User manual
ATU800
Table of Contents
1
2
INTRODUCTION ................................................................................................................................................ 5
INSTALLATION ................................................................................................................................................ 9
2.1
Environmental .................................................................................................................................... 9
2.2
Mechanical ......................................................................................................................................... 9
2.3
Battery Power Supply ....................................................................................................................... 12
2.3.1
Alkaline Battery Power Supply......................................................................................................... 12
2.3.2
Alkaline Battery Removal and Replacement..................................................................................... 13
2.4
DC Power Supply ............................................................................................................................. 13
2.4.1
DC Supply Module Removal and Replacement ................................................................................ 14
2.5
Mains Power Supply......................................................................................................................... 14
2.5.1
Mains Power Supply Module Removal and Replacement ................................................................ 15
2.5.2
Back-up Battery Power Supply (Mains version)............................................................................... 15
2.5.3
Battery Pack Removal and Replacement (mains version) ............................................................... 16
2.6
Battery Safety and Disposal.............................................................................................................. 16
2.7
Modem Communications (units with internal modems only)............................................................ 16
2.7.1
Connecting to the Telephone Line (units with internal modems only).............................................. 17
2.7.2
Connecting to the GSM network (units with internal GSM units only) ............................................ 17
2.7.3
Connecting to the GPRS network (units with internal GPRS units only) ......................................... 17
2.7.4
Connecting to the LEO Satellite. ...................................................................................................... 17
2.8
CPU Reset ........................................................................................................................................ 17
2.9
Displays ............................................................................................................................................ 18
2.9.1
LCD and LED display ...................................................................................................................... 18
2.9.2
Local Display Interface .................................................................................................................... 18
2.10
Input / Output Capabilities ............................................................................................................... 18
2.10.1 I/O Wiring......................................................................................................................................... 18
2.10.2 Digital Inputs.................................................................................................................................... 19
2.10.3 Count (Accumulator) Inputs ............................................................................................................. 19
2.10.4 Digital Outputs ................................................................................................................................. 19
2.10.7 Analogue Inputs................................................................................................................................ 20
2.10.8 MODBUS.......................................................................................................................................... 22
2.11
Pseudo Analogue Inputs ................................................................................................................... 23
2.11.1 Battery Powered ATU800................................................................................................................. 23
2.11.2 DC Powered ATU800....................................................................................................................... 23
2.11.3 Mains Powered ATU800 .................................................................................................................. 23
3 COMMUNICATIONS ........................................................................................................................................ 24
3.1
Masterstation (units with remote communication modules only) ..................................................... 24
3.1.1
Alarm dial-outs ................................................................................................................................. 24
3.1.2
Interrogations ................................................................................................................................... 24
3.2
Outstation Programming Terminal for Windows (OPTwin) ............................................................ 24
3.2.1
Local OPTwin (RS232)..................................................................................................................... 24
3.2.2
Remote OPTwin (units with remote communication modules only) ................................................. 25
3.2.3
Local interrogation (RS232)............................................................................................................. 25
3.3
GSM Interface Card ......................................................................................................................... 25
3.4
PSTN Interface Card ........................................................................................................................ 26
3.5
Auxiliary communications (RS232, RS485, SDI-12, Ethernet)......................................................... 26
3.5.1
RS232 Interface Card ....................................................................................................................... 26
3.5.2
RS485 Interface Card ....................................................................................................................... 27
3.5.3
SDI-12 Interface Card ...................................................................................................................... 28
3.5.4
Ethernet Card ................................................................................................................................... 29
4 SHORT-FORM SPECIFICATIONS ...................................................................................................................... 30
4.1
Common Specification across all Inputs .......................................................................................... 30
4.2
Digital Inputs.................................................................................................................................... 30
4.3
Analogue Inputs................................................................................................................................ 30
4.4
Count inputs...................................................................................................................................... 31
4.5
Digital outputs .................................................................................................................................. 31
4.7
Sequences ......................................................................................................................................... 31
4.8
Site and Telephone Data................................................................................................................... 31
4.9
Communications (units with internal modems fitted) ....................................................................... 32
4.10
Communications (local) ................................................................................................................... 32
ATU800 User manual
3
Communications (auxiliary)............................................................................................................. 32
4.11
4.12
Mechanical....................................................................................................................................... 32
4.13
Electrical .......................................................................................................................................... 32
4.14
Environmental .................................................................................................................................. 32
4.15
Real-time clock (RTC)...................................................................................................................... 32
5 APPENDIX A – STANDARD CABLING INFORMATION...................................................................................... 33
5.1
Mains Power Cable Wiring Schedule............................................................................................... 34
5.2
DC Power Cable Wiring Schedule................................................................................................... 34
5.3
Local (OPTwin) Serial Port Connector Wiring Schedule ................................................................ 34
5.4
8 Digital Input + 2 Digital Output Connector Wiring Schedule ...................................................... 35
5.5
2 Analogue Input Connector Wiring Schedule ................................................................................. 36
5.6
RS232 (Modbus) Wiring Schedule ................................................................................................... 37
5.7
Simple 5-Wire MODBUS Wiring Schedule ...................................................................................... 37
5.8
Simple 4-Wire SDI-12 Wiring Schedule ........................................................................................... 37
4
ATU800 User manual
Introduction
1
Introduction
Figure 1: ATU800
The D715x MkII family will now be designated ATU800 family and is a range of IP65/IP67 low-power
data logger/telemetry outstations. Four power options are available, each with their own method of
power back-up. These are D-cell battery powered with a second bank of D-cells as back-up, DC
powered with D-cells back-up, DC powered with NiMH back-up and mains AC powered with NiMH backup. The name “ATU800” will be used throughout this manual as a generic name for all members of the
family unless specifically stated otherwise.
The many capabilities and small size of the ATU800 means that it is ideally suited to a wide range of
applications in the utilities and industrial markets. These include the monitoring of: •
Water Hydrology
•
•
Zonal distribution
Environmental
•
•
•
Industrial Pollution
Water and Sewage
Gas Installations
-
Rain
River
Tidal
Flood Warning
-
Temperature
Wind
Humidity
Pressure
Data logging, telemetry and local intelligence (sequences) are all combined in the one unit and thus the
need for separate outstations and data loggers is reduced. MODBUS, WITSDNP3, AquaCom, FSK and
SDI-12 protocols are available to accept input and output data from existing PLCs and intelligent
instrumentation thus integrating the islands of automation and information that may presently exist.
As a telemetry outstation, the ATU800 unit is capable of reporting alarm conditions as they arise. Stored
data can be retrieved at any time over PSTN / GSM / GPRS or Satellite links to a Masterstation, or
locally via direct RS232 cable connection.
ATU800 User manual
5
The ATU800 can be configured to implement a wide variety of logging strategies. Powerful bespoke
logging can be achieved when sequences are employed e.g. variable rate or combined event logging to
fit a daily, weekly or monthly pattern. The unit may be fully configured using Outstation Programming
Terminal for Windows (OPTwin) software, available from Xylem Water Solutions UK Ltd.
Key features in this unit include:
• Reduced power consumption using low-voltage electronics and advanced power
management.
• Proven multi-microprocessor system with integral self-diagnostic electronics.
• Glanded cables or military-style connectors for easy cable installation and removal.
• “Green” - alkaline and NiMH batteries with lower environmental impact.
• Increased battery capacity to reduce service requirements.
• Intelligent charging techniques to maximise battery capacity and service life.
• High-resolution analogue measurement – up to 16-bit possible.
• Wide variety of analogue inputs supported.
• Enhanced protocol set – Dynamic Logic FSK, AquaCom, MODBUS, SDI-12, WITS DNP,
and Ethernet.
• Optional interface to radio, GSM, GPRS and satellite equipment - configurable as RS232 or
RS485.
• Improved operating temperature specification with internal monitoring.
• Enhanced noise immunity
Caution
ATU800 units contain low-power CMOS
components that are static-sensitive. As with
all electronic equipment, standard ESD
precautions must be observed when opening
the enclosure to prevent possible damage
through static discharge.
Warning
Electric shock hazard may be present in mains
powered ATU800 units.
ATU800 must be disconnected from the mains
power supply before removing the lid
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ATU800 User manual
A summary of features is given below: Parameter
Power Supply Options
Internal Battery Back-up
Options
Operating Temperature
Range
Relative Humidity
Digital Inputs
Digital Outputs
Analogue Inputs
Counter Inputs (configurable
as Digital Inputs)
Display
Serial Communication Ports
Log size
Sensor Connection
Enclosure (W x H x D)
IP ratings
Specification
9Vdc (using six or twelve alkaline D cells)
11Vdc to 36Vdc
100 - 240Vac @ 50-60Hz 0.4A
One battery pack on both battery and dc powered units and the
option of two NiMH (rechargeable battery back-up) packs on
dc and mains units.
-10°C to +50°C
0 to +95% @ +45°C (non-condensing)
Eight
Input: volt-free contacts: closed < 1kΩ, open > 100kΩ
Input: open-collector (open-drain) transistor
Two
volt-free photoMOS relay outputs rated 24V ac/dc @ 0.5A
Two
16-bit resolution max, 14-bit min.
Accuracy ±0.05%
Current, voltage, potentiometric
12Vdc and Vref pulsed sensor supplies with short- circuit
protection
Eight inputs as per digital inputs. Note replaces digital inputs.
0 – 99999999 (eight decade)
LCD: 2-rows, 16-characters
EL illumination as an option
Three communication ports configured as one local (COM0) for
OPTwin, two internal for PSTN/GSM/GPRS/Satellite modems /
RS232/RS485/SDI-12 interfaces. A further Ethernet port is also
an option.
Supported protocols include MODBUS RTU/ASCII, SDI-12,
FSK, AquaCom, WITSDNP3 protocols available.
>500KB
Low cost military-style circular connectors or glanded cables.
188mm x 188mm x 130mm
IP67 (enclosure), IP65 connectors
The ATU800 range is designed to maximise energy efficiency and employs state-of-the-art power
management circuitry. The unit conserves power by switching into a “sleep” mode whenever possible,
where all but the highest priority functions are inactive. The unit “wakes” periodically to perform various
housekeeping duties, such as: • Reading of digital inputs.
• Count rate update.
• Time log / analogue conversion.
In addition, the unit will stay awake while carrying out particular functions:
• Analogue alarm delay.
• Digital output active.
• All external communications.
• Sequence wake states.
The unit is designed to conduct wake-state functions with optimum speed and efficiency. In order to
maximise battery life, it is recommended that the above functions be configured with care, keeping
wake-states to a minimum. Failure to observe this operational requirement may significantly reduce
battery life.
ATU800 User manual
7
A typical ATU800 unit comprises: 1. A main board, containing the major system components (processors, memory, I/O electronics).
2. A primary power supply board. On Battery units, this board houses battery holders and
associated regulator electronics. On Mains powered units, the holders are replaced with an
encapsulated power supply module and one NiMH Battery Pack as standard, (optionally two
NiMH packs can be fitted). The DC units with D-cell backup have dc regulator electronic
components fitted. The DC units with NiMH back-up have one NiMH battery pack, (optionally
two NiMH packs can be fitted).
3. An LCD/Display board. In the battery and DC powered units this has the additional facility of
holding additional D-cell backup batteries
4. Up to two Signal Conditioning Modules.
5. An optional Ethernet module
6. Up to two communications interface units
7. External cabling either glanded cables or cables with military-style connectors.
8
ATU800 User manual
Installation
2
Installation
Note: ATU800 Series Outstations should only be opened by suitably qualified personnel, as
dangerous voltages may exist if the unit is disassembled.
2.1
Environmental
The ATU800 utilises a polycarbonate enclosure rated to IP-67. The following environmental conditions
apply: Operating temperature: -10°C to +50°C.
Storage temperature: -10°C to +60°C.
Relative humidity:
0 to 95% @ 45°C (non-condensing).
2.2
Mechanical
It is recommended that the unit is mounted vertically on a stable structure, secured using screws or bolts
via the four mounting holes located in the enclosure corners – these apertures can be accessed by
removing the lid. All input cabling connects to the units are via glanded cables or two-part military-style
connectors.
A dimensioned drawing of the ATU800 and enclosure is shown in Figure 2.
The main assembly comprises three PCBs mounted in a stack within the enclosure.
The bottom PCB in the stack is the main board housing all the CPU and interface electronics. It is
affixed directly to the mounting bosses at the bottom of the enclosure. Internal modems PSTN or GSM /
GPRS and RS232/RS485/SDI-12 and Ethernet modules plug directly into this board. The I/O wiring and
Signal Conditioning Modules (SCMs) also plug into this board via modular connectors.
Mounted above the main board are two additional boards. These power modules house the batteries,
power supplies, LCD and status LEDs as required. The primary power module, mounted above the CPU
board accommodates: • six ‘D’ cell battery holders in battery-powered units,
• four ‘D’ cell battery holders in the case of DC powered units with D call backup.
• one or two NiMH Battery packs in the case of DC or Mains powered units
• an encapsulated power supply in the case of mains powered units
along with electronic circuitry to regulate the power on dc and mains units.
Mounted on the lid is the display board. The LCD and LEDs are fitted on the reverse side, facing
upwards towards the user. This board also contains the secondary power module, and may house a
further six ‘D’ cell battery holders in battery powered units, allowing up to twelve batteries in total to be
fitted to that model and 10 batteries in total to be fitted to the DC-D cell backup units.
The PCBs are connected together such that in the case of the battery version all twelve batteries are
exposed simultaneously for easy changeover.
Caution
These battery banks should be changed one bank completely at a time to prevent any
data loss. Also polarity of all batteries must be carefully observed as described later in
this document.
A desiccant sachet is incorporated into the unit to protect against corrosion, dampness and
condensation. This material can be re-activated by placing the sachet in an oven at +120°C for four
hours. The material will last approximately one year before drying out is required, depending on the
ambient environmental conditions and the amount of time in which the enclosure lid is removed.
The unit is fitted with an internal sensor for measuring the enclosure temperature (an important
parameter when charging batteries) which can be checked using OPTwin.
ATU800 User manual
9
Figure 2a: ATU800 dimensions Glanded version
Figure 2b: ATU800 dimensions Military version
10
ATU800 User manual
Figure 2c: ATU800 height dimensions both versions
ATU800 User manual
11
2.3
Battery Power Supply
2.3.1 Alkaline Battery Power Supply
The battery-powered variant of the ATU800 range is designed to operate from up to twelve alkaline ‘D’
cells on two independent power supply boards. The battery holders are arranged in two arrays of six.
Below is the DC version with six batteries in the lid and 4 on the main power PCB. The orientation is
shown as if the unit is vertically wall-mounted i.e. the lid folds down toward you.
CAUTION
The proper battery polarity is moulded into the battery holder and all batteries in the array MUST be
positioned correctly. Failure to do this can result in battery leakage and subsequent unit damage.
Ensure the batteries are inserted properly.
Figure 3: Alkaline Battery Holder Array
(DC Version)
Electrical power is applied to the ATU800 electronics as soon as the last battery is inserted into the
battery holder. The working voltage of this unit is nominally 9Vdc. The condition of each battery array is
monitored by the system and alerts are generated if faults are detected. In addition, the gradual decline
in battery-array voltage is measured and when the levels drop below defined thresholds, the unit can be
configured to generate an alarm dial-out.
The gentle slope of the alkaline discharge curve means that low-battery warnings can be generated far
in advance of complete power failure, allowing reasonable time to change the cells. Eventually, when
the end-of-discharge-voltage (EODV) is reached, the unit will inhibit LED operation in order to extend the
battery life thus safeguarding plant and preserving data. The unit will remain in this state until the
batteries are replaced. Note: - new batteries must be replaced in one array at a time if data is to be
preserved.
A dedicated fuse, adjacent to the holders, protects each battery array. The fuse will rupture if all the
batteries are inserted the wrong way round. However if only one battery is inserted with the wrong
polarity then this may lead to electrolyte leakage which will destroy the unit’s electronics and poses a
potential fire hazard. Reference should be made to the polarity symbols on the battery holders,
reproduced in Figure 3.
The operational life of alkaline batteries is largely defined by a combination of the following parameters:
•
12
Rated battery capacity.
The rated capacity of a particular alkaline ‘D’ cell is dependent on model and manufacturer.
Xylem Water Solutions UK Ltd recommends that high-capacity batteries (Duracell M3,
Procell or similar) are used to reduce service requirements.
ATU800 User manual
2.3.2
•
Shelf life.
All batteries are subject to loss of capacity due to self-discharge. A five to seven year shelf
life is quoted for Duracell M3 or Procell alkaline batteries. The shelf life of cheaper brands
may be considerably less.
•
Temperature.
Battery self-discharge increases above +50°C because of the deterioration of the chemical
cells. A more severe effect occurs below 0°C, in which the capacity is degraded due to a
reduction in electrochemical activity within the battery. Ideally, the unit should be protected
from temperature extremes.
•
Sensor loading
Sensors that are powered from the unit obviously place a load on it and therefore a drain on
the batteries. In terms of energy requirements, the most demanding sensors are incremental
shaft encoders, current transducers PSTN, GSM/GPRS and radio communications. Battery
service life can be maximised by the use of low-power sensors, by selecting low scan-rates
and by minimising the communications and log transfers.
•
Operational usage
The unit is designed to minimise the quiescent power requirements that occur during sleep
mode. The majority of battery energy is consumed during sequence wake-states and when
communications are active. Minimising these operations will extend battery life.
Alkaline Battery Removal and Replacement
CAUTION
When replacing batteries, always change one array at a time in order to ensure continuity of
supply. Failure to observe this procedure will cause loss of data. Ensure that the
batteries are inserted with the correct polarity as indicated on the battery holder.
•
•
•
•
•
Unscrew the two corner screws and open downward gently to expose the batteries.
The batteries are arranged in horizontal arrays as shown in Figure 3 – observe the battery
polarities shown.
Remove the cells in one array and replace with fresh batteries.
Repeat each battery in turn until all the batteries have been replaced.
Carefully replace the lid of the outstation, and firmly screw in place to ensure a good seal.
2.4
DC Power Supply
The dc-powered variant in the ATU800 range can be connected to an 11Vdc to 36Vdc supply. The dc
supply is protected with a slow-blow 20mm fuse. This fuse is designated F1 and is located on the dc
power supply module. The unit should only be opened by suitably qualified personnel and the fuse
should only be replaced with one of the same type and rating.
WARNING
Short-circuiting when the unit is disassembled may damage live electronics.
Disconnect from the dc supply before removing the lid.
Battery back-up is provided in the event of mains failure by optional alkaline batteries that are not
charged during normal operation or NiMH battery packs that are trickle charged and power cycled. This
allows the unit to dial out and report the power failure while continuing to operate for a period of time
without a dc supply, depending on ambient temperature and usage.
In the D-cell backup Pseudo Analogue 6 is the external DC Input monitor. This can be configured to
indicate when the dc power is disconnected. Alarm dial-outs may be generated on this input, thus
providing the facility to inform the Masterstation of DC power supply failure on site. Similarly Pseudo
Analogue 5 is the back-up battery monitor that can also be configured to dial out when the back-up
battery voltage is getting low.
In the case of the NiMH back-up Pseudo Analogues 7, 8, 9 and 10 can be used in battery pack
diagnostic. They may also be configured to cause a dial out when an abnormal condition arises.
ATU800 User manual
13
2.4.1
DC Supply Module Removal and Replacement
CAUTION
Removal of the dc power supply module will result in loss of data. In order to avoid this, read
and store the live data before disconnecting the module and set this as the preset (via
OPTwin) after replacement.
WARNING
Unit may be damaged if live terminals are short-circuited. Removal and replacement
of the power supply module should only be carried out by suitably qualified
personnel.
•
•
•
•
•
•
•
•
Disconnect unit from external power supply.
Unscrew the two corner screws and open downward gently to expose the dc power supply
module.
Disconnect the power plug from the DC power supply module and in the case where NiMH
battery packs are present – remove their plugs from the PCB
Disconnect the ribbon cables from the dc power supply module.
In the case of D-cell backup, unscrew the six screws that secure the dc power supply
module and remove. In the case of NiMH backup, unscrew the four screws that hold the
NiMH cover plate and remove.
Unscrew the two screws and four hex pillars that secure the mains power supply module
and remove.
DC power supply module replacement is the reverse of the above procedure.
Carefully replace the lid of the outstation, and firmly screw in place to ensure a good seal.
2.5
Mains Power Supply
The mains powered variant in the ATU800 range can be connected to a 100Vac to 240Vac supply at
50Hz to 60Hz. The mains supply is protected with a slow-blow 20mm fuse. This fuse is located on the
mains power supply module. The unit should only be opened by suitably qualified personnel and the
fuse should only be replaced with one of the same type and rating.
WARNING
Electric shock hazard may be present when the unit is disassembled. Disconnect
from the mains supply before removing the lid.
Battery back-up is provided in the event of mains failure by NiMh batteries that are trickle charged during
normal operation. This allows the unit to dial out and report the mains failure while continuing to operate
for a period of time without a mains supply, depending on ambient temperature and usage.
Pseudo Analogue 11 is the Mains Fail monitor. This will be ‘Failed’ when the mains supply is
disconnected. Alarm dial-outs may be generated on this input, thus providing the facility to inform the
Masterstation of mains failure on site. Pseudo Analogues 7, 8, 9 and 10 can be used in Battery pack
diagnostics. They may also be configured to dial out when this condition arises.
14
ATU800 User manual
2.5.1
Mains Power Supply Module Removal and Replacement
CAUTION
Removal of the mains power supply module will result in loss of data. In order to avoid this,
upload the live data before disconnecting the module and set this as the preset (via OPTwin)
after replacement.
WARNING
Hazardous voltages are present on the mains power supply module. Disconnect from
the supply before removal. Removal and replacement of the power supply module
should only be carried out by suitably qualified personnel.
•
•
•
•
•
•
•
•
2.5.2
Disconnect unit from mains supply.
Unscrew the two corner screws and open downward gently to expose mains power supply
module.
Disconnect the power plug from the AC power supply module and disconnect the NiMH
plugs from the PCB
Disconnect the ribbon cables from the mains power supply module.
Unscrew the four screws that hold the NiMH cover plate and remove.
Unscrew the two screws and four hex pillars that secure the mains power supply module
and remove.
Mains power supply module replacement is the reverse of the above procedure.
Carefully replace the lid of the outstation, and firmly screw in place to ensure a good seal.
Back-up Battery Power Supply (Mains version)
In the event of external supply failure, back-up power can be provided by one or two 9.6Vdc battery
packs. These packs are available from Xylem Water Solutions UK Ltd and the basic ATU800 comes
with one NiMh cell fitted.
The mains units feature comprehensive battery management circuitry, designed to charge NiMh cells
safely and effectively. When two NiMh packs are fitted the batteries are conditioned to maximise
capacity and service life and are monitored to ensure availability of a reliable back-up supply. (i.e. the
batteries are checked regularly to ensure they have adequate capacity rather than assuming everything
is o/k until proven otherwise.). The description on this page is for twin NiMh packs fitted.
Each pack is connected to a conditioning circuit that controls the battery charge and discharge cycles.
There are four modes of operation, listed as follows:
•
Trickle charge
The battery packs are subjected to a trickle charge regime to overcome self-discharge.
•
Fast charge
The battery packs receive full-rated charge current for up to eighteen hours.
•
Discharge
Periodically, a battery pack in turn is completely discharged to prevent a reduction in
capacity and then fully recharged. This cycle is then repeated for the other battery pack. The
packs are independent so one can supply the back-up power while the other is in a
discharged state.
•
Back-up powered
This mode is implemented when the mains fail and the unit is operating from the back-up
power.
Visual indications of the charger modes are provided by LEDs adjacent to each pack. The LEDs are
illuminated as shown in the following table:
ATU800 User manual
15
Trickle charge
Fast charge
Discharge cycle
Back-up powered
Discharging LED
OFF
OFF
ON
OFF
Trickle LED
ON
ON
OFF
OFF
Charging LED
OFF
ON
OFF
OFF
The battery pack capacities are measured periodically by the system. If a pack is faulty or its capacity
has dropped below a minimum threshold, the unit can be configured to generate an alarm dial-out.
2.5.3
Battery Pack Removal and Replacement (mains version)
CAUTION
If operating from battery back-up supply, always change one pack at a time in order to
ensure continuity of supply. Failure to observe this procedure will cause loss of data.
Ensure that the batteries are inserted with the correct polarity as indicated on the battery
holder.
•
•
•
•
•
•
•
Unscrew the two corner screws and open downward gently to expose the batteries.
Unscrew the four screws on the NiMh safety plate to access the two battery packs that are
mounted one behind the other.
Remove the cells in one pack replace with a new pack.
Replace the power lead observing correct polarity.
Repeat for other pack if it requires replacing.
Replace safety cover with label to front.
Carefully replace the lid of the outstation, and firmly screw in place to ensure a good seal.
2.6
Battery Safety and Disposal
Alkaline batteries do not contain heavy metals such as cadmium and therefore these cells are not
classified as hazardous waste. NiMh batteries have a lesser impact on the environment than other types
of cells (i.e. NiCad cells), but may still be subject to local regulations in some areas. It is recommended
that the local authorities be contacted for their disposal guidelines.
Incorrect handling may cause the batteries to rupture, leak or decrease in performance. To prevent this,
please observe the following precautions:
•
•
•
•
•
•
•
•
For best performance and longevity, it is recommended that alkaline batteries, such as
Duracell M3, be used.
Replace battery with same type only. Using another battery may present a risk of fire or
explosion.
Do not short-circuit, disassemble, heat above 100°C or incinerate batteries.
Do not compact, mutilate or physically abuse the batteries.
Do not re-charge alkaline batteries.
Dispose of batteries promptly with observance of local guidelines.
Keep batteries away from children.
Do not consume.
2.7
Modem Communications (units with internal modems only)
For communicating over PSTN it is recommended that the unit be connected to an ex-directory, data
quality, dedicated telephone line. Line loss must not exceed 27dB.
The ATU800 modem can operate in pulse or DTMF modes – in order to save power, it is recommended
that the ATU800 be connected to a DTMF telephone line that provides a quicker connection. If unsure of
the type of telephone line connected to the unit, contact your service provider.
PSTN can be used as a fallback option if GPRS, Radio or Private Wire is used as primary
communication. Full configuration and set-up of the fallback functionality including timeouts is detailed in
the OPTwin manual.
16
ATU800 User manual
2.7.1 Connecting to the Telephone Line (units with internal modems only)
The ATU800 modem is ready for connection to the PSTN. Xylem Water Solutions UK Ltd strongly
recommends that Lightning Protection Units (LPUs) are used with every ATU800 outstation. An LPU is
located between the telephone line and the ATU800 as shown in Figure 4. A suitable LPU for PSTN
applications is available from Xylem Water Solutions UK Ltd. If using a Lightning Protection Unit then
reference to the LPU instruction should be made.
Telephone Jack Boxes
ATU800
Outstation
LPU
Telephone Line
Figure 4: Lightning Protection Unit connections
2.7.2 Connecting to the GSM network (units with internal GSM units only)
The ATU800 GSM is ready for connection to Vodafone, O2 or Orange GSM networks; however the SIM
card inserted into the units must be an analogue data SIM and set accordingly. This analogue data
service is also known as Circuit Switched Data or CSD. This SIM is available from your network service
provider. For further information regarding telephone number configuration and set-up please refer to
the OPTwin manual.
2.7.3 Connecting to the GPRS network (units with internal GPRS units only)
The ATU800 GPRS is ready for connection to Vodafone, or Orange GPRS. Currently the ATU800 will
operate on a scanned system where the masterstation polls for data from each of the remote outstations
on a regular basis. A fixed IP address for host (masterstation) is required for either operation.
Configuration of the GPRS interface module is performed using the OPTwin configuration tool and
details of this are in the OPTwin manual.
2.7.4 Connecting to the LEO Satellite.
The ATU800 is ready for connection to a LEO, (low earth orbit), satellite system in two flavours.
• Satellite modem to satellite modem, thus eliminating any dependence on terrestrial
telecommunication network infrastructure
• Satellite modem to PSTN modem eliminating the need for remote PSTN installation costs where
none already exist.
The data transfer speed is 2400Baud. Currently the ATU800 will control the external power to the
satellite modem so that remote unattended battery operation is a viable option.
For further information regarding Satellite number configuration and set-up please refer to the OPTwin
manual.
2.8
CPU Reset
The ATU800 unit is monitored by sophisticated watchdog circuitry. In the unlikely event of the outstation
“hanging up” then a pushbutton, mounted on the main board, is provided for manual reset. Note that
logged data and unit configuration are unaffected by pressing this button. Depending on type, some
sequences may require to be re-started (via OPTwin).
ATU800 User manual
17
2.9
Displays
2.9.1 LCD and LED display
The ATU800 unit is supplied with an integral display as shown in Figure 2, comprising a two-line by
sixteen-character liquid crystal display (LCD) and up to six light emitting diodes (LEDs). These items are
visible via windowed areas in the lid. The following table defines the function of each LED when
illuminated. When active, the LEDs are pulsed in order to save power.
Label
Description
Actions
LED
Connect
Test dial active &
call status.
Power
Mains or dc power
is connected.
Battery
Battery power on.
Comm 1
Modem serial port
1 active.
Comm 2
Modem serial port
2 active.
Local*
Local indication of
Alarm status
Option selected
Connected
Acknowledged
Power OK
Power Low
No Power
Battery OK
Battery Low
No Battery
Powered but no connection
Connected
GSM/PSTN Call
GPRS connected to network
GPRS in Use – TCP Connection
Powered but no connection
Connected
GSM/PSTN Call
GPRS connected to network
GPRS in Use – TCP Connection
Unacknowledged Active Alarm
No Alarms
Full On
Slow Flash
Fast Flash
Full On
Medium Flash
Off
Full On
Medium Flash
Off
Full On
Flashing
Medium Flash
Slow Flash
Fast Flash
Full On
Flashing
Medium Flash
Slow Flash
Fast Flash
Medium Red Flash
Full On Red
*Note the Local LED is intentionally dimmer than the other LEDs
2.9.2 Local Display Interface
The local interface operates in conjunction with the integral display components detailed in the previous
section. Two switches are concealed behind the LCD and MODE labels on the lid which are operated
using the orange Data Collector key supplied with the unit. To activate the LCD, briefly place the flat end
of the key on the LCD label and then remove in a “dabbing” motion. This should initiate a scrolling
display, in which the salient details such as sensor data, status information etc. are shown in a
sequential manner (if required the ATU800 can be programmed so that only important data is
displayed). To freeze the scroll at a particular point, dab the MODE label. To continue scrolling, dab the
MODE label again. Finally, the display can be de-activated by dabbing the LCD label. In the absence of
user activity, the LCD will automatically de-activate after 30 minutes.
An additional switch is concealed behind the test DIAL label. In units fitted with PSTN or GSM modems,
dabbing the test DIAL label will cause the unit to dial the number in the test dial phone field and transmit
a low-level alarm. The unit reports the result of the test dial on the LCD.
2.10
Input / Output Capabilities
The full I/O capability is described in Sections 1 and 4 of this document. The customer specifies the
exact I/O mix at the order stage.
2.10.1 I/O Wiring
The ATU800 unit is fitted with circular military–type connectors or glanded, flying leads to suit the I/O
requirements of the unit. The pin assignments of each connector are specified in the appendices of this
document. The connectors are rated to IP-65 on standard units. Unused connectors are fitted with dust
caps.
Note: where possible, the sensor wiring should have the signal and return wires running
together as twisted pairs. In order to minimise noise-related problems, ensure that the sensor
wiring is separate from any mains or three-phase supplies that may be present on site.
18
ATU800 User manual
2.10.2 Digital Inputs
Up to eight digital inputs can be connected to an ATU800 unit. Volt-free contacts, open collector and
open-drain inputs are supported as shown in the drawing below.
PLANT
D7000
DIGITAL INPUT
VOLT-FREE
CONTACT
0V
DIGITAL INPUT
OPEN-DRAIN
MOSFET
0V
DIGITAL INPUT
OPEN-COLLECTOR
TRANSISTOR
0V
Figure 5: Digital Input Connections
The digital inputs are protected against reversal, transients, ac mains interference and contact bounce.
2.10.3 Count (Accumulator) Inputs
Count inputs provide a totalled count for digital inputs Using OPTwin, any digital input can be configured
as a count input. Volt-free contacts, open collector and open-drain inputs are supported. The following
states can be counted:
• Opening contacts.
• Closing contacts.
• Opening and closing contacts.
Each count input can be configured with up to two independent trip points. These trip points (Rate Alarm
detectors – RADs) may be used to trigger an alarm dial-out or an ‘event’ log on breaching a set value in
any direction.
2.10.4 Digital Outputs
The two digital outputs utilise single pole normally open photoMOS relay contacts to provide switching
functions. These outputs may be configured to close for any period up to 65535 seconds. As the unit is
intended primarily for low-power operation, it is recommended that these outputs be used to provide
brief and infrequent signals e.g. process or initialisation.
To comply with the low-voltage directive, voltages to the digital output relay contacts must be limited to
24Vdc (0.5A maximum) or 24Vac (0.5A maximum), thus complying with safe extra low voltage (SELV).
Note: All dangerous live voltages greater than SELV (50Vac or 75Vdc) must be
terminated externally to the ATU800 enclosure, and be isolated from the ATU800
circuitry e.g. via interposing relays.
When wiring digital outputs to plant it is preferable to run a twisted-pair from the outstation to the power
supply unit and relay, where possible. This reduces the risk of RFI pick-up.
ATU800 User manual
19
2.10.7 Analogue Inputs
The ATU800 unit will support up to four analogue inputs. The inputs are galvanically isolated from the
unit and are configured using a range of plug-in Signal Conditioning Modules (SCM). Each supported
sensor input type, and corresponding SCM number is listed in the following table:
Sensor Type
SCM Number
0 – 1 mA
0 – 10 mA
1 – 10 mA
0 – 20 mA
4 – 20 mA
1
2
3
4
5
0 – 1Vdc
0 – 2Vdc
0 – 5Vdc
1 – 5Vdc
0 – 10Vdc
Potentiometric
6
7
8
9
10
11
The required SCMs are specified at the customer order stage. The plug-in design allows field retrofits to
be accomplished with relative ease.
The ATU800 unit is fitted with integral power supplies for sensor excitation. To save energy, the sensors
are powered during the scan interval only. Two supply options are available:
• 12Vdc for current and voltage sensors
• 2.048Vdc for potentiometric sensors
Using OPTwin, the unit may be configured with a pre-scan power-up time to power the sensor prior to
measurement. This starts at 1mS and has an upper limited depending on the firmware version in the
outstation. Outstations with firmware version 2.021 and greater and pic firmware versions 1.10 or 1.11
can have a pre-power time of up to 60 seconds. OPTWin Version 2.01 or greater is also required to
enable this to be set. Units with firmware earlier than these releases are limited to 1999mS.
All analogue inputs can be configured with up to four independent trip points. These trip points (Level
Alarm Detectors - LADS) may be used to trigger an alarm dial-out or an ‘event’ log on breaching a set
value in any direction.
Figures 9A to 9D show example wiring diagrams for the supported sensor types.
20
ATU800 User manual
PLANT
D7000
ATU800
Fig 9A Example of Voltage Input Connection
V
VOL TAGE INP UT
AI_ 1+
AI_ 1-
E XTE RNAL 12Vdc
SUPPLY
(ALTERNATIVE)
+
+V_1
-
GND_1
VOLTAGE SIGNA L
CONDITIONING
MODUL E (S CM)
ISO LATED
CO NVE RSION
ELE CTRONICS
12Vdc ON-BO ARD
SENSOR SUPPLY
Fig 9B Example of 4 Wire Current Input Connection
mA
CURRENT TRANSMITTER INPUT
AI_ 1+
AI_ 1-
E XTE RNAL 12Vdc
SUPPLY
(ALTERNATIVE)
+
+V_1
-
GND_1
CURRENT SIG NAL
CONDITIONING
MODUL E (S CM)
ISO LATED
CO NVE RSION
ELE CTRONICS
12Vdc ON-BO ARD
SENSOR SUPPLY
Fig 9C Example of 2 Wire Current Input Connection
mA
CURRENT L OOP INPUT
AI_ 1+
AI_ 1-
E XTE RNAL 12Vdc
SUPPLY
(ALTERNATIVE)
+
+V_1
-
GND_1
CURRENT SIG NAL
CONDITIONING
MODUL E (S CM)
ISO LATED
CO NVE RSION
ELE CTRONICS
12Vdc ON-BO ARD
SENSOR SUPPLY
Fig 9D Example of Potentiometric Input Connection
POTENTIOMETRIC INPUT
>2K
AI_ 1+
AI_ 1-
EXTERNA L 2.048Vdc
SUPPLY
(ALTERNATIVE)
+
+VREF_1
-
GND_1
POTENTIOMETRIC
SIGNA L
CONDITIO NING
MO DULE (SCM)
ISO LATED
CO NVE RSION
ELE CTRONICS
2.048Vdc O N-BO ARD
SENSOR SUPPLY
Figures 9A to 9D: Examples of Analogue Input Connections
ATU800 User manual
21
2.10.8 MODBUS
The ATU800 unit will support MODBUS data both from the masterstation via a dial-up connection and to
other outstations / PLCs connected to it on the secondary serial port. A maximum of 32 outstations /
PLCs may be daisy chained on the RS458 data bus each individually addressed and scanned. (Note the
maximum of 32 assumes that each PLC has the same single data-type e.g. digital inputs.) This
maximum of 32 is reduced by each of the different types of inputs present e.g. if digital inputs and digital
outputs are to be read in or out of each of the attached PLC’s then the maximum number of PLC’s that
can be attached is reduced to 16. Similarly if digital inputs and outputs along with analogue inputs and
outputs are to be read then the maximum number of PLCs that can be attached is reduced to 8.
The ATU800 unit can be configured to be master, where it will control the polling and data transfer to
other MODBUS units / systems, or it can be set to be a slave where it will respond to other MODBUS
masters.
The ATU800 MODBUS can be configured to communicate RTU or ASCII protocol. Note however that
the serial port settings differ depending on the type of MODBUS selected. Both options are given below:
• MODBUS RTU – 8 data bits, 1 stop bit, no parity
• MODBUS ASCII – 7 data bits, 1 stop bit, no parity
A fully integrated solution is available where MODBUS inputs and outputs are treated as native direct
inputs and outputs. The ATU800 unit will time-stamp these inputs on receipt from the PLC. These may
subsequently be used in sequences or other ATU800 control or monitoring strategies.
Note however that inputs from the MODBUS port will not be available at exactly the same time as
native inputs therefore any strategy that combines local and MODBUS inputs to form alarm or
control actions must take this delay into account.
An alternative method of interfacing to MODBUS data is PASSTHRU mode. This is in effect MODBUS in
and MODBUS out. The ATU800 does not perform any processing on the data but becomes a telemetry
MODBUS data gateway. In this mode there is no effective limit on the I/O other than what the PLC(s)
already place. In this mode the limit on the number of external PLC’s able to be connected to the RS485
data bus is 32.
22
ATU800 User manual
2.11
Pseudo Analogue Inputs
As well as having 8 unassigned physical analogue inputs for customer use the ATU800 has a number of
Pseudo Analogue Inputs that are used for diagnostic purposes. These are assigned depending on the
particular ATU model i.e. Battery, DC or Mains powered. For each the following gives how they are
used.
For each power variation the first four are common namely: PA 1 = PSTN Powered-on Time in minutes
PA 2 = PSTN Dial-out Counter
PA 3 = PSTN Ring or Dial-in Counter
PA 4 = PSTN Connection Failed Counter
2.11.1 Battery Powered ATU800
PA5 = Battery Bank 1 Voltage
PA6 = Battery Bank 2 Voltage (if fitted)
PA7 = ATU800 Internal Temperature in 1/10th ˚C
2.11.2 DC Powered ATU800
PA5 = Battery Bank Voltage
PA6 = Input Voltage
PA7 = ATU800 Internal Temperature in 1/10th ˚C
2.11.3 Mains Powered ATU800
PA5 = Rechargeable Cells Bank 1 Status
PA6 = Rechargeable Cells Bank 2 Status (if fitted)
PA7 = Rechargeable Cells Bank 1 Capacity mAHr
PA8 = Rechargeable Cells Bank 2 Capacity mAHr (if fitted)
PA9 = Rechargeable Cells Bank 1 Voltage Level
PA10 = Rechargeable Cells Bank 2 Voltage Level (if fitted)
PA11 = DC Input Voltage (after PSU).
PA12 = ATU800 Internal Temperature in 1/10th ˚C
Note these only apply to the Primary channel and only on PSTN.
ATU800 User manual
23
Communications
3
Communications
There are three communication ports available on the ATU800 with Com 0 reserved for local
configuration / interrogation. The remaining two are flexible and can be configured with communication
modules to suit the particular users’ needs. Note however only 1 Master and one Secondary remote
communications module is allowed. However if this is configured then there are no ports left for
communicating with MODBUS in either RS232 or RS485 format and for SDI-12.
3.1
Masterstation (units with remote communication modules only)
The ATU800 outstation communications with Masterstations can be either outgoing (alarm) or incoming
(interrogation). The following sections describe the general sequence of events in both alarm and
interrogation modes.
3.1.1 Alarm dial-outs
Up to five different telephone numbers may be programmed into the ATU800 unit, each up to eighteen
digits long (including pauses). The status of each telephone number may be designated as Master or
Back-up.
Each Sensor configured on the ATU800 for alarm dial-outs may be linked to any back-up number via the
special phone index (see OPTwin guide). When an alarm condition arises on that sensor, then the
corresponding backup is promoted to Master status for that alarm condition only.
On waking from the low-power “sleep” mode, if a valid alarm is detected, the unit will dial ALL enabled
Master telephone numbers in order (from 1 to 5). If a number fails to respond it will go on to the rest of
the numbers before retrying the failed one. Backup telephone numbers will be dialled if ANY Master
telephone number has failed to respond correctly. They will be dialled, in order, until a successful
attempt to ONE of them has been made.
Each telephone number will be tried in turn up to four times, with a delay of one minute between
different numbers and three and a half minutes before dialling the same failed number again.
3.1.2 Interrogations
Approximately six seconds after detecting an incoming-ringing signal the ATU800 unit will answer the
call and commence communications with the interrogating equipment. Once communications have
finished, the ATU800 and the interrogating equipment will release the communications path line. The
unit will then return to “sleep” mode.
3.2
Outstation Programming Terminal for Windows (OPTwin)
OPTwin is a proprietary application program available from Xylem Water Solutions UK Ltd. It may be
used to both configure and interrogate an ATU800 unit. The host PC must be IBM-compatible, running
Microsoft Windows 95 or better.
The host PC may be connected locally to the ATU800 unit on COM 0 using RS232. Alternatively, the PC
may remotely access the outstation via the PSTN or GSM links. The details are given in the following
sections.
3.2.1 Local OPTwin (RS232)
Local communications requires a custom cable to connect from an RS232 serial port of a host PC to the
local RS232 programming port connector on the ATU800 enclosure. The connection will automatically
activate the LCD and LEDs. Details of this cable are provided in the appendices
The communication settings in the host PC must be configured in OPTwin to match the settings on the
ATU800 unit. The usual data format is 8-bit, no parity, 1-stop bit. The transmission speed is set at
115200 baud.
.
24
ATU800 User manual
3.2.2 Remote OPTwin (units with remote communication modules only)
Remote communications require no additional wiring or setting up at the ATU800 but make use of a
compatible PSTN modem or GSM / GPRS or Satellite module connected to the host PC.
On detection of an incoming call, e.g. the ringing signal on PSTN, the ATU800 will “wake-up”.
Approximately six seconds later it will answer the call and commence communications with the host PC.
Once communications are finished, the ATU800 and the host PC will release the communication line
and the outstation will then return to “sleep” mode.
Full details for using OPTwin and ATU800 programming are covered in the OPTwin Operators Guide.
3.2.3 Local interrogation (RS232)
The ATU800 unit can also be interrogated by data gathering equipment via the local RS232 port in the
manner described in the previous sections.
3.3
GSM Interface Card
The GSM option is a quad band module.
On-board these cards are 5 diagnostic LEDs controlled either from the main microprocessor or
permanently in circuit when Link LK1 is inserted. A sixth LED shows the status of the GSM module and
its connection to the network. Looking at the card from the component side with the 5 LEDs on the right
they are: Signal
Colour
Description
POWER
TX
Red
Green
RX
Red
DCD
Data Carrier Detect
RI
Ring Indicator
Yellow
On when the RS232 card is powered
Flashes in synchronism with data being
transmitted from the ATU800 to any external
device.
Flashes in synchronism with data being received
from an external device into the ATU800.
On indicates a connection has been established
with the remote device.
Flashes on and off indicating the ATU800 is
receiving a call.
Orange
The separate 6th LED flashes fast ? per second indicating it is searching for the GSM network and
flashes slow about ? per second indicating it is established on the GSM network.
Customer connection to the GSM module is via a MMCX socket i.e. the connection to the antenna is a
plug with the centre pin.
For country settings and initialisation strings please see Telit manual.
ATU800 User manual
25
3.4
PSTN Interface Card
The PSTN option is a full V? modem.
On-board these cards are 5 diagnostic LEDs controlled either from the main microprocessor or
permanently in circuit when Link LK1 is inserted. Looking at the card from the component side with the 5
LEDs on the right they are: Signal
LED
Colour
Description
POWER
TX
Transmit Data
RX
Received Data
RTS
Request To Send
DCD
Data Carrier Detect
RI
Ring Indicator
Red
Green
On when the PSTN card is powered
Flashes in synchronism with data being transmitted
from the ATU800 to any external device.
Flashes in synchronism with data being received from
an external device into the ATU800.
On indicates the ATU is ready to send data.
Red
Yellow
Yellow
Orange
On indicates a connection has been established with
the remote device.
Flashes on and off indicating the ATU800 is receiving
a call.
LK2 allows the card to be configured for passive or active ring detect which allows the ATU800 to sleep
and wake-up when it is being contacted from a remote system.
Customer connection to the PSTN module is via a standard RJ11 socket.
For country settings and initialisation strings please see Telit manual.
3.5
Auxiliary communications (RS232, RS485, SDI-12, Ethernet)
The general purpose communication port can be populated with an RS232, RS485 or SDI-12 card. The
Ethernet option is an option for DC and Mains powered units and must be specified at order placement.
These interface cards will also allow the ATU800 unit to be used as a MODBUS and/or SDI-12 interface.
Note power to these interface cards is controlled by the main microprocessor which may be configured
to be off most of the time conserving power.
3.5.1 RS232 Interface Card
The RS232 option is a full V24-compliant serial port, designed to interface with approved third-party
communication equipment with a similar interface e.g. radio modems, GSM transceivers, satellite
terminals, etc. A full list of compliant equipment is available from Xylem Water Solutions UK Ltd.
26
ATU800 User manual
On-board these cards are 9 diagnostic LEDs controlled either from the main microprocessor or
permanently in circuit when Link LK1 is inserted. .Looking at the card from the component side with the
LEDs on the right they are: Signal
Colour
Description
POWER
TX
Red
Green
RX
Red
RTS
Request To Send
CTS
Clear To Send
DTR
Data Terminal Ready
DSR
Data Set Ready
DCD
Data Carrier Detect
RI
Ring Indicator
0V
Enable Power
Enable Relay
RS232 Power
Relay Switched power
Yellow
On when the RS232 card is powered
Flashes in synchronism with data being
transmitted from the ATU800 to any
external device.
Flashes in synchronism with data being
received from an external device into the
ATU800.
On indicates the remote device is ready to
send data to the ATU800.
On indicates the ATU800 is ready to
accept data.
On indicates the remote device is ready to
accept a connection.
On indicates the ATU800 is ready for
communicating.
On indicates a connection has been
established with the remote device.
Flashes on and off indicating the ATU800
is receiving a call.
Yellow
Yellow
Yellow
Yellow
Orange
Connect to 0V to select
Connect to 0V to select
+12V
+12V
20 Way
connector
1
11
2
12
3
13
4
14
5, 15, 8, 18
6
16
9, 19
10,20
On-board this card is the ability to either power the RS232 external device or to switch a +12V via a
relay under the control of the ATU800 (not both). These signals are available on the 20 way connector
as shown previously.
3.5.2 RS485 Interface Card
The RS485 option can be configured as either a 2 wire or 4 wire RS485 multi-drop interface and has two
links (LK1 and LK2) for connecting the terminating resistors on the final ATU800 in a multi-drop RS485
network. Link LK4 is used to provide external power at either 12V or 15 Volts. The maximum current that
can be drawn is ?mA
On-board these cards are 8 diagnostic LEDs controlled either from the main microprocessor or
permanently in circuit when Link LK1 is inserted. .Looking at the card from the component side with the
LEDs on the right they are: -
ATU800 User manual
27
Signal
Colour
Description
POWER
A1
Red
Green
B1
Red
On when the RS232 card is powered
Flashes in synchronism with data being
transmitted from the ATU800 to any
external device.
Flashes in synchronism with data being
received from an external device into the
ATU800.
CD1
CD2
2 Wire
4 Wire
RQW
Request Wake
Wake request
Yellow
Yellow
Red
Red
Green
Loop Common
0V
A2
B2
+12V
0V
6 Way
connector
Low input from remote RS485 device to
wake-up the ATU800
Low output from ATU800 to remote
RS485 device to wake-up.
Only used for 4 wire RS485
Only used for 4 wire RS485
1
2
4
5
3
6
1
2
3
4
3.5.3 SDI-12 Interface Card
The Serial Data Interface at 1200 baud (SDI-12) option is an asynchronous, ASCII Serial
communications card that provides the means for interfacing to intelligent sensory instruments.
Included on the card is the means of supplying +12V (LK 3 between 1&2) or +15V (LK 3 between 2&3)
On-board these cards are 3 diagnostic LEDs controlled either from the main microprocessor or
permanently in circuit when Link LK1 is inserted. Looking at the card from the component side with the
LEDs on the right they are: Signal
Colour
Description
POWER
Red
TX
Data
Green
On when the RS232 card is powered
Flashes in synchronism with data being
transmitted from the ATU800 to any external
device.
Flashes in synchronism with data being received
from an external device into the ATU800.
RX
Common
+Power
12V or 15V
28
Red
Power dependent on position of LK3
4 Way
connector
1
2, 3
4
ATU800 User manual
3.5.4 Ethernet Card
The Ethernet card comes with only the single Ethernet circuitry is present. Diagnostic LEDs are the 2
normal LEDs on the Ethernet socket.
Note there is no communication expander electronics present.
ATU800 User manual
29
Short-form Specifications
4
Short-form Specifications
4.1
Common Specification across all Inputs
Alarm delay period
Alarm Inhibit Period
Special Phone Index
4.2
0 to 65535 seconds
0 to 65535 seconds
Promotes any back-up number in the telephone list to a Master number.
Digital Inputs
Number of real digital inputs.
Number of pseudo digital inputs.
Number of derived digital inputs.
Engineer-on-site timer.
Scanning period.
Signal detection.
Electrical characteristics:
Scan interval
Holding current
Wetting current
Activation
4.3
Eight
Two
Fifty.
0 to 65535 minutes (default = 60 minutes).
One second for all digital inputs.
Any duration down to one second.
Non-isolated. Internally pulled-up to +3Vdc.
15mSecs to 1 Sec
3μA minimum.
32mA peak (4.7μs time constant).
Connect to 0V via external volt-free contacts, open-drain or opencollector inputs.
Analogue Inputs
Number of real analogue inputs.
Number of derived analogue inputs.
Number of pseudo analogue inputs.
Battery:
DC:
Mains:
Number of LADs per analogue
Scanning period.
Time logging period.
Input ranges and input impedance,
Current:
Input ranges and input impedance,
Voltage:
Two.
Twenty-five.
Seven (Modem 1-4, Battery 5-6, Temperature 7).
Seven (Modem 1-4, DC 5, Battery 6, Temperature 7).
Twelve (Modem 1-4, Batt state 5-6, Batt Capacity 7-8, Batt
9-10, Mains 11, Temperature 12).
4
1 to 65535 seconds (default = 900 seconds)
0 (disabled) to 65535 minutes between readings
0 – 1 mA, 1 kΩ minimum.
0 – 10 mA, 100 Ω minimum
1 – 10 mA, 100 Ω minimum
0 – 20 mA, 50 Ω minimum
4 – 20 mA, 50 Ω minimum
0 – 1Vdc, 500 kΩ minimum
0 – 2Vdc, 490 kΩ minimum
0 – 5Vdc, 470 kΩ minimum
1 – 5Vdc, 470 kΩ minimum
0 – 10Vdc, 470 kΩ minimum
Input ranges, Potentiometric:
The parallel resistance of potentiometric inputs on
the unit must not fall below 2 kΩ.
Potentiometric input, Reference
voltage.
Isolation between input channels.
Isolation between input channel and
ATU800.
Measurement resolution.
Accuracy over operating temperature
range.
Transducer power supply.
Pre-scan power-up time.
2.048Vdc ± 5%
30
30Vdc
500Vdc
16-bits / 15bit + sign (14-bits minimum)
±TBA% full scale
12Vdc ± TBA% (when measuring analogues)
0 to 4000ms, settable in 15ms increments
ATU800 User manual
4.4
Count inputs
Count detection (contact only).
Number of count inputs. Configurable as
Digital Inputs)
Closing, opening or both.
Eight
Number of RADs per count.
Scale factor (per pulse).
Preset value.
Roll-over value.
Scanning period
Time logging period
Stored data format
Signal detection
Maximum frequency.
Electrical characteristics (non-isolated)
Holding current
Wetting current
Activation
Two.
0.01 to 99.99
0 to 99999999 (8 decades maximum).
0 to 99999999 (8 decades maximum).
15ms to 1 s
0 (disabled) to 65535 minutes between readings
5 or 8 decades (for all count inputs)
Any duration down to 20ms.
25Hz
Internally pulled-up to +3Vdc.
See digital inputs for details
See digital inputs for details
Connect to 0V via external volt-free contacts, open-drain or
open-collector inputs
4.5
Digital outputs
Output type:
Number of digital outputs.
Inch delay period.
Isolation between digital outputs.
Isolation between digital outputs and ATU800.
Rating (per output)
PhotoMOS relay
Two.
0 to 65535 seconds in 1ms increments.
>5kVac.
5kVac.
24V ac or dc, 500mA maximum.
4.7
Sequences
Sequences are user-written programs that provide flexible, local processing, calculation and control
facilities within the ATU800 outstation, giving them a high level of local intelligence.
Up to sixteen individual sequences may be active within the ATU800 at any one time with varying
degrees of interaction possible, together with automatic re-start on power-up (if required).
Each sequence program may accept up to ten parameters, which are then allocated to specific I/O or
values at download time.
In addition to the full range of real I/O, the sequences may also write data to and read data from:•
•
•
•
Up to seventy-five Derived Analogues.
Up to fifty Derived Digitals.
Up to twenty-five Derived Counts.
Up to fifty inter-sequence variables (used to pass information from one sequence to another).
The fcomplete list of reserved words, symbols and commands is in the OPTwin manual.
4.8
Site and Telephone Data
Site identity range.
Security code range.
0001 to 9999.
0001 to 9999.
The following applies to units with
internal modems fitted:
Telephone number list.
Up to five telephone numbers + one test dial number.
Digits per telephone number (including
pauses)
Communications type.
Up to eighteen digits.
ATU800 User manual
PSTN, GSM, GPRS, Satellite
31
4.9
Communications (units with internal modems fitted)
Telephone numbers, communication rotas, protocols, baud rates etc are all configurable with OPTwin
and are described in the OPTwin manual
4.10
Communications (local)
OPTwin communication protocol.
D1236 FSK plus D4100 superset+ D7xxx superset.
Logging communication protocols.
D1236 FSK plus D4100 superset+ D7xxx superset.
Transmission (RS232).
300 baud to 115200 baud.
8 data bits, no parity, 1 stop bit.
4.11
Communications (auxiliary)
Communications Protocol.
DL FSK, MODBUS (optional) RTU or ASCII, DNP,
WITSDNP, AquaCom
Transmission.
RS232/v24, RS485
300 baud to 115200 baud
8 data bits, 1 stop bit., no parity
MODBUS RTU 8 data bits, 1 stop bit., no parity
MODBUS ASCII 7 data bits, 1 stop bit., no parity
4.12
Mechanical
Enclosure dimensions.
Height: 188 mm excluding connectors
Width: 188 mm
Depth: 130 mm
3 kg. (ATU800)
1.5mm2 maximum.
Polycarbonate
Base unit: Light-grey – RAL 7032
Lid: Clear polycarbonate with adhesive diagnostic label.
Average weight
Maximum sensor wiring size.
Enclosure material.
Enclosure finish.
4.13
Electrical
Operating voltage.
Battery:
DC:
Mains:
9Vdc (using six or twelve alkaline D cells) fused
11Vdc to 36Vdc (dc-powered option) fused
100 - 240Vac @ 50-60Hz 0.4A (ac-powered option) fused
Sensor wiring.
Use screened twisted-pairs for all I/O.
Connect screen to 0V.
Digital output loads.
Directly connected – do not exceed 24V ac or dc @ 500mA.
Indirectly connected – larger loads may be switched if external
interposing relays are used
4.14
Environmental
Operating temperature range.
Storage temperature range.
Temperature sensor accuracy
Relative humidity at 45°C.
Enclosure ingress rating.
Connector ingress rating.
4.15
Real-time clock (RTC)
+10°C to +40°C.
0°C to +50°C.
-10°C to +60°C.
Date.
32
-10°C to +50°C.
-10°C to +60°C.
±1°C
Up to 95% (non-condensing).
IP67.
IP65 (IP67 available as an option).
better than 25 seconds per month – TBA
better than 50 seconds per month – TBA
better than 90 seconds per month - TBA
Valid until year 2135.
ATU800 User manual
Appendices
5
Appendix A – Standard Cabling Information
Fig 10: Position of plant input cables shown above (Military Connectors).
With the exception of the Power, Antenna, PSTN and or RS232/RS485/SDI12 connections all inputs
and outputs are connected to the ATU800 via military style connectors. These can be obtained directly
from Xylem Water Solutions UK Ltd. The pin-out arrangements of these sockets are shown in the next
pages.
Power and PSTN connection to the unit is via the supplied glands, as is the Antenna coax cable
connection to the GSM terminal.
When MODBUS RS232, RS485 or SDI-12 is required, this connection to the unit is via either the
Comm1 or Comm 2 gland.
If GPRS with PSTN fallback is required then further serial communication ports are not available.
Fig 11: Position of plant input cables shown above (Glanded Cables).
ATU800 User manual
33
5.1
Mains Power Cable Wiring Schedule
ATU800
CORE
PLANT
SIGNAL
BROWN
1
LIVE
BLUE
2
NEUTRAL
FUNCTION
EARTH
GREEN/YELLOW
5.2
WIRE NUMBER
DC Power Cable Wiring Schedule
ATU800
CONNECTION
PLANT
SIGNAL
RED
1
DC+
BLUE
2
DC-
FUNCTION
EARTH
GREEN/YELLOW
5.3
WIRE NUMBER
Local (OPTwin) Serial Port Connector Wiring Schedule
A
B
D
C
Figure 12: Connector Insert Arrangement and Contact Identification
The table below indicates the pin connections required to make an RS232 interface cable between the
ATU800 and a host PC. Suitable cables are available from Xylem Water Solutions UK Ltd.
ATU800
CONNECTION
HOST PC
SIGNAL
9-way D socket
25-way D socket
OV
A
Red
GND
5
7
/OPT
B
Blue
LINK
5
7
RXD (in)
C
Green
RXD
3
3
TXD (out)
D
Yellow
TXD
2
2
34
ATU800 User manual
5.4
8 Digital Input + 2 Digital Output Connector Wiring Schedule
(Digital Connector)
A
B
M
C
N
L
P
D
U
V
K
R
T
E
S
J
F
H
G
Figure 13: Connector Insert Arrangement and Contact Identification
(Viewed from front on to Sockets)
ATU800
PLANT
Signal
Military
Pin
Description
DI_1
A
Digital Input 1
Black
Black
DI_2
B
Digital Input 2
White
White
DI_3
C
Digital Input 3
Red
Red
DI_4
D
Digital Input 4
Green
Green
0V
E
Dig I/P 1-4 0V common
Orange
Yellow
DI_5
M
Digital Input 5
Blue
Blue
DI_6
N
Digital Input 6
White/Black
Brown
DI_7
P
Digital Input 7
Red/Black
Violet
DI_8
R
Digital Input 8
Green/Black
Orange
Glanded Cable
Colour
Alternate
Colour
0V
V
Dig I/P 5-8 0V common
Orange/Black
Pink
DO_1
G
Digital Output 1
Blue/Black
Turquoise
DO_1
H
Digital Output 1
Black/White
Grey
DO_2
J
Digital Output 2
Red/White
Red/Blue
DO_2
K
Digital Output 2
Green/White
Green/Red
S
Not used
Blue/White
Yellow/Red
T
Not used
Black/Red
White/Red
U
Not used
White/Red
Red/Black
L
Not used
Orange/Red
Red/Brown
F
Not used
---
Wire
No.
Function
Note 1) Screen is to be left on at free-end of cable and connected to customers 0V.
2) Colour identifier is ‘Base colour/Stripe 1/Stripe 2’
3) Table shows the basic (minimum) configuration.
ATU800 User manual
35
5.5
2 Analogue Input Connector Wiring Schedule
(Analogue Connector)
A
B
M
C
N
L
P
U
D
V
K
R
T
E
S
J
F
H
G
Figure 14: Connector Insert Arrangement and Contact Identification
(Viewed from front on to Pins)
ATU800
Signal
Military
Pin
Description
PLANT
Glanded Cable
Colour
Alternative
Colour
Ch_1 0V
A
Analogue 1 Supply 0V
Black
Black
Ch_1 –ve
B
Analogue 1 Signal –ve
White
White
Ch_1 +ve
C
Analogue 1 Signal +ve
Red
Red
Ch_1+Vref*
D
Analogue 1 Supply +ve
Green
Green
Ch_2 0V
G
Analogue 2 Supply 0V
Orange
Yellow
Ch_2 –ve
H
Analogue 2 Signal –ve
Blue
Blue
Ch_2 +ve
F
Analogue 2 Signal +ve
White/Black
Brown
Ch_2+Vref*
E
Analogue 2 Supply +ve
Red/Black
Violet
Wire
No.
Function
Optional
Ch_3 0V
J
Analogue 3 Supply 0V
Green/Black
Orange
Ch_3 –ve
K
Analogue 3 Signal –ve
Orange/Black
Pink
Ch_3 +ve
L
Analogue 3 Signal +ve
Blue/Black
Turquoise
Ch_3+Vref*
M
Analogue 3 Supply +ve
Black/White
Grey
Ch_4 0V
N
Analogue 4 Supply 0V
Red/White
Red/Blue
Ch_4 –ve
P
Analogue 4 Signal –ve
Green/White
Green/Red
Ch_4 +ve
R
Analogue 4 Signal +ve
Blue/White
Yellow/Red
Ch_4+Vref*
S
Analogue 4 Supply +ve
Black/Red
White/Red
T
Not used
White/Red
Red/Black
U
Not used
Orange/red
Red/Brown
V
Not used
---
Note 1 ) Screen is to be left on at free-end of cable and connected to customers 0V.
2 ) Colour identifier is ‘ Base colour/Stripe1/Stripe2 ‘
3) Table shows the basic (minimum) configuration.
* +12V dc for current & voltage personality cards and +2.048V dc for potentiometric personality
card.
36
ATU800 User manual
5.6
RS232 (Modbus) Wiring Schedule
The RS232 link is rated at 115200 baud maximum over a 30m link.
ATU800
5.7
Connection
Cable Colour
Alternative Cable Colour
Signal
TX
White
White
TXD (output)
RX
Turquise
Tan (Light Brown)
RXD (input)
RTS
Brown
Brown
Ready to Send
CTS
Orange
Orange
Clear to Send
DTR
Purple
Violet
Data Terminal Ready
DSR
Blue
Blue
Data Set Ready
DCD
Green
Green
Data Carrier Detect
RING
Pink
Pink
Ring
0V
Black
Black
Signal Ground
+V-Rly
Yellow
Yellow
Power or Relay
Simple 5-Wire MODBUS Wiring Schedule
ATU800
CONNECTION
5.8
SIGNAL
Data A
Blue
Data B
Green
Loop Common
Yellow
+12V DC Sensor
Red
0V
Black
Simple 4-Wire SDI-12 Wiring Schedule
ATU800
CONNECTION
ATU800 User manual
SIGNAL
Data Signal
Blue
Data Common
Green
+12V DC
Red
Gnd
Black
37
1) The tissue in plants that brings water from the roots
2) A leading global water technology company.
We’re 12,000 people unified in a common purpose: creating innovative
solutions to meet our world’s water needs. Developing new technologies
that will improve the way water is used, conserved and re-used in the future
is central to our work. We move, treat, analyse and return water to the
environment and we help people use water efficiently, in their homes,
buildings, factories and farms. In more than 150 countries, we have strong,
long-standing relationships with our customers who know us for our
powerful combination of leading product brands and applications expertise,
backed by a legacy of innovation.
For more information on how Xylem can help you, go to xyleminc.com
Xylem Water Solutions (UK) Ltd
Colwick
Nottingham
NG4 2AN
United Kingdom
Tel +44 (0)115 940 0111
Fax +44(0) 115 940 0444
ATU800 Owner manual V1.3
38
ATU800 User manual