Installation Instructions
Document No. 997-1000
February 12, 2009
SLX Series
Application Specific Controllers
(SLX-ASC-FCU-L, SLX-ASC-HPU-L, SLX-ASC-RTU-L, SLX-ASC-UV-L)
Free Programmable Controllers
(SLX-PC-203, SLX-PC-300, SLX-PC-400 Models, SLX-PC-500 Models)
1. Product Description
This document describes the hardware installation procedures
for the SLX Series Application Specific Controller (ASC) and
free Programmable Controller (PC).
The ASC product line is designed to control and monitor HVAC
equipment such as fan coil units, rooftop units, heat pump units
and unit ventilators. This product line includes the following
controllers: SLX-ASC-FCU-L, SLX-ASC-HPU-L, SLX-ASCRTU-L and SLX-ASC-UV-L.
The PC product line is designed to control and monitor various
HVAC equipment such as rooftop units and air handling units,
as well as chillers and boilers. Moreover, it is suitable for any
lighting control and power measurement application. This
product line includes the following controllers: SLX-PC203,SLX-PC-300, SLX-PC-400, SLX-PC-403 SLX-PC-410,
SLX-PC-413, SLX-PC-500 and SLX-PC-510.
These product lines are based on the LONWORKS® technology
for peer-to-peer communication between controllers and are
LONMARK® certified.
• All of these controllers are built on a similar
platform, but have different numbers of inputs
and outputs. Moreover, each individual model
has different amounts of digital and/or universal
outputs. For more information on the specific
layout and functionality of each controller, please
refer to their individual technical specification
sheets.
• The following controllers are housed in small
enclosures: SLX-ASC-FCU-L, SLX-ASC-HPU-L,
SLX-ASC-RTU-L, SLX-ASC-UV-L, SLX-PC-203,
and SLX-PC-300.
• The following controllers are housed in large
enclosures: SLX-PC-400 models and SLX-PC500 models.
Figure 1: (Top to Bottom) Large Enclosure with HOA
Switches, Large Enclosure, and Small Enclosure.
SLX Series
Page 1 of 9
Document No. 997-1000
Installation Instructions
February 12, 2009
2. General Installation Requirements
3. General Wiring Recommendations
For proper installation and subsequent operation of each
controller, pay special attention to the following
recommendations:
- It is recommended that the controller(s) be kept at room
-
-
-
-
-
temperature for at least 24 hours before installation to
allow any condensation that may have accumulated, due
to low temperature during shipping/storage, to evaporate.
Upon unpacking the product, inspect the contents of the
carton for shipping damages. Do not install damaged
controllers.
Allow for proper clearance of controller enclosure, wiring
terminals and service pin for easy access, hardware
configuration and maintenance. Remember to record the
®
Neuron ID located on both sides of the device (in text and
barcode format) for later commissioning.
Each controller is designed to operate under the following
environmental conditions:
ƒ Ambient temperature from 32°F to 158°F (0°C to 70°C)
ƒ Relative humidity from 0% to 90%, non-condensing
Ensure proper ventilation of each controller and avoid
areas where corroding, deteriorating or explosive vapors,
fumes or gases may be present. Each controller must be
oriented with the ventilation slots and power supply/output
terminal block connector towards the top to permit proper
heat dissipation.
The plastic enclosure has a back plate that is separable
from the front plate allowing the back plates (with the
connectors) to be shipped directly to the installation site
while all the engineering is done in the office.
If the controller is used and/or installed in a manner not
specified, the functionality and the protection provided by
the controller may be impaired.
Any type of modification to any SLX Series product
will void the product’s warranty.
Take special care to keep the front and back plate
aligned when separating and joining them.
Take
reasonable
precautions
to
prevent
electrostatic discharges to each controller when
installing, servicing or operating the controller.
Discharge accumulated static electricity by
touching your hand to a securely grounded object
before working with each controller.
Page 2 of 9
Turn off power before any kind of servicing.
- All wiring must comply with electrical wiring diagrams as
well as national and local electrical codes.
- To connect the wiring to each controller, use the terminal
-
-
-
connectors. It is recommended to remove the front plate
from the back plate to facilitate the wiring process;
however, it is possible to do all wiring with the front and
back plates together. Use a small flat screwdriver to
tighten the terminal connector screws once the wires have
been inserted.
Power type cables (i.e. for power, 2- and 3-wire voltage
and current inputs and outputs, as well as triac outputs)
should be kept apart from other types of wiring to avoid
any ambient noise transmission to other wires.
The board connectors accept wires or flat cables ranging
from 22 to 14AWG (0.644 to 1.630mm diameter) per pole.
However, power cables must remain between 18 and
14AWG (1.024 to 1.630mm diameter).
Do not connect the universal inputs, analog/digital outputs
or common terminals to earth or chassis ground (unless
stated otherwise).
The transformer powering each controller must be
configured as a floating transformer (i.e. it should not be
grounded).
Keep all wires away from high speed data transmission
cables (ie. Ethernet, etc.).
Keep input and output wiring in conduits or trays, or close
to the building frame if possible.
4. Mounting Instructions
Each controller can be mounted on a DIN rail to speed up the
installation procedure. The controllers are also equipped with
two mounting holes of 0.25” (6.35mm) by 0.165” (4.191mm).
They can be mounted in a panel or on a wall by using
appropriate screw types (use sheet metal, thread forming or
self-tapping screws accordingly).
DIN Rail-Mounted Installation
1. Make sure that the DIN rail is properly mounted on the wall.
2. Simply clip controller onto the DIN rail.
Wall-Mounted Installation
1. Open the controller by separating the front and back plate
using the side clips.
2. From within the back plate use the mounting holes to mark
the location of any holes that need to be drilled.
3. Remove the back plate and drill holes.
4. Finally, clean the perforated surface and fasten the device
using the appropriate screw types.
SLX Series
Document No. 997-1000
Installation Instructions
February 12, 2009
5. Controller Dimensions
6. Power Wiring
Voltage: 24VAC/DC; ± 15%, Class 2
To conform to Class 2 requirements in the United
States, use transformers of 100VA or less to power
the controller.
When powering one or multiple devices, use the following
method to calculate the power requirements of the required
transformer:
- Add up the maximum power consumption of all controllers
and multiply this sum by 1.3.
- If the resulting number is higher than 100VA, consider
using multiple transformers.
Use an external fuse on the 24VAC/DC side (secondary side)
of the transformer, as shown in Figure 3, to protect all
controllers against power line spikes.
Maintain consistent polarity when connecting controllers and
devices to the transformer. That is, the COM terminal of each
controller and each peripheral should be connected to the
same terminal on the secondary side of the transformer.
The controllers are half-wave rectified. Connecting
two half-wave power supplies to the same
transformer without maintaining polarity will cause a
short circuit.
Controller 1
24VAC/DC
24V COM
Controller 2
24VAC/DC
24V COM
Fuse
24VAC
AC
Transformer
Figure 3: Power Wiring – AC.
Figure 4: Power Wiring – DC.
The COM terminals of the controller are internally
wired to the 24V COM terminal of the power supply.
Therefore, if powering peripherals and controllers
with the same transformer, it is essential to maintain
polarity. Failure to do so will result in a short circuit
and/or a damaged controller.
Figure 2: (Top to Bottom) Rear View of the Large
Enclosure, Rear View of the Small Enclosure, and Side
View of the Large and Small Enclosure.
SLX Series
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Document No. 997-1000
Installation Instructions
February 12, 2009
7. Input Wiring
Each controller has physical connections for inputs that are
software configurable from within the controller’s LNS® plug-in.
Each input can be configured for digital, resistive, current or
voltage signals. Input types must be configured properly with
the LMT to ensure proper input readings.
On the SLX-PC-400 models and SLX-PC-500
models, the onboard 15 VDC output can be used to
supply the current loop shown in Figure 8. Refer to
the transducer installation guide for further details.
Connect the current input according to the following figure if
a 3-wire, 4-20mA transducer is being used.
Before connecting any input equipment to the
controller, refer to the installation guide of the
equipment manufacturer.
• For a wire length less than 75’ (23m), either a
shielded or unshielded 18AWG wire may be
used.
• For a wire length between 75’ and 200’ (23m to
61m), a shielded 18AWG wire is recommended.
• The wire should be shielded on the controller
side and the shield length should be kept as
short as possible.
Wiring Digital Inputs
This input configuration is used to monitor digital dry
contacts, as well as pulsed contacts (PC models only).
Figure 9: Current Input – 3-Wire Transducer.
Connect the current input according to the following figure if
the transducer is powered by its own power source.
Figure 10: Current Input – Transducer with its Own
Power Source.
Wiring Voltage Inputs
Voltage inputs have a range of 0 to 10VDC. Connect the
voltage input according to the following figure if a 3-wire 010V transducer is being used.
Transducer
+
0-10V
UIx
COM
Common
Figure 5: Digital Input – Digital Dry Contact (NO and NC).
Wiring Resistive Inputs
This input configuration is used to monitor 100Ω and 1000Ω
RTDs, 10kΩ type II and III thermistors, as well as 10kΩ and
100kΩ (PC models only) potentiometers.
Figure 6: Resistive Input – RTD /Thermistor Input.
24VAC
24VAC
Figure 11: Voltage Input – 3-Wire Transducer.
Connect the voltage input according to the following figure if
the transducer is powered by its own power source.
Figure 12: Voltage input – Transducer with its Own
Power Source.
8. SLX-RTS/SLX-STAT Wiring
Figure 7: Resistive Input – 10kΩ Potentiometer Input.
• The ASCs do not support 100Ω or 1000Ω inputs.
• When using a 100Ω input, the wire length should
be kept short so as to avoid a possible
temperature offset. For example, an 18AWG
wire, 25’ (7.6m) in length can create an offset of
2°F (1.1°C).
Wiring Current Inputs
Current inputs have a range of 4 to 20mA. Connect the
current input according to the following figure if a 2-wire, 420mA transducer is being used.
Figure 8: Current Input – 2-Wire Transducer.
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Each controller is compatible with the SLX-RTS line of
standard room sensors. Refer to the SLX-RTS and SLX-STAT
installation instructions for wiring details.
9. Output Wiring
Each controller has physical connections for triac outputs
and/or universal outputs, depending on the type and model.
These outputs are all software configurable.
Controller
SLX-ASC-FCU-L
SLX-ASC-HPU-L
SLX-ASC-RTU-L
SLX-ASC-UV-L
SLX-PC-203
Models
SLX-PC-300
Models
Triac
Outputs
5
5
5
5
5
Universal
Outputs
2
2
2
2
3
0
8
Jumper
0-10VDC/0-20mA
SLX Series
Document No. 997-1000
Installation Instructions
February 12, 2009
Controller
SLX-PC-4x0
Models
SLX-PC-4x3
Models
SLX-PC-500
Models
Triac
Outputs
0
Universal
Outputs
12
Jumper
0-10VDC/0-20mA
9
8
4
9
0
12
9
Figure 15: Discrete 0 or 12VDC Universal Output – Relay.
Wiring Current Outputs
The 0 to 20mA signal is configurable by jumper (available
for SLX-PC-400 models and SLX-PC-500 models only).
Before connecting any output equipment to the
controller, refer to the installation guide of the
equipment manufacturer.
• For a wire length less than 75’ (23m), either a
shielded or unshielded 18AWG wire may be
used.
• For a wire length between 75’ and 200’ (23m to
61m), a shielded 18AWG wire is recommended.
• The wire should be shielded on the controller
side, and the shield length should be kept as
short as possible.
Figure 16: Current 0-20mA Universal Output and
Jumper Configuration.
Wiring Voltage Outputs
Connect the 0 to 10VDC output according to the following
figure.
Wiring Triac Outputs
Digital outputs are all made of triacs and there is no voltage
present on the output terminals. Therefore, an external
power source has to be added if necessary.
To measure the state of a triac output, an external
load must be connected.
Figure 17: Voltage 0-10VDC Universal Output.
Connect the 0 to 10VDC output according to the following
figure if an analog actuator is being controlled.
Connect the digital output according to the following figure if
a relay is being controlled.
Figure 18: Voltage 0-10VDC Universal Output –
Analog Actuator.
Figure 13: Digital Triac Output – Relay.
Connect the digital output according to the following figure if
a floating actuator is being controlled.
Figure 14: Digital Triac Output – Floating Actuator.
Wiring Universal Outputs
Universal outputs can be configured to provide either a
discrete signal of 0 or 12VDC, a linear signal ranging from 0
to 10VDC or a 0 to 20mA signal (SLX-PC-400 models and
SLX-PC-500 models). The discrete signal can be used to
generate a pulse wave modulation (PWM) signal or a simple
two-state signal. These outputs are protected by an autoreset fuse.
Wiring Discrete Outputs
When controlling a relay with a universal output, a diode
must be connected in parallel to protect the controller from
back-emf current, which occurs when the relay is turned off.
It is recommended to use diodes that are part of the 1N400x
family and they should be placed closer to the relay.
SLX Series
10. Communications Wiring
The recommended cable type for LON® communications is
22AWG (0.65 mm), twisted pair, unshielded. The LON
communication wire is polarity insensitive and can be laid out
in a bus, star, loop or free topology. For loop topology, polarity
is important and special care must be taken when connecting
the LON network to avoid a short circuit.
It is recommended to use the bus topology network
configuration for all LON communication wiring, as it
allows for easy network troubleshooting.
Connect both wires to the LON 1 or 2 terminals of the
controller. If inserting multiple wires in the terminals, ensure
that the wires are properly twisted together prior to inserting
them in the terminal connectors.
Figure 19: Communications Wiring.
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Document No. 997-1000
Installation Instructions
February 12, 2009
For more information and detailed explanations on network
topology and wire length restrictions, refer to the Junction Box
and Wiring Guideline for Twisted Pair LonWorks® Networks,
published by Echelon® Corporation.
It is important to use proper network terminators
depending on the type of network topology used.
Failure to do so can result in communication errors
between controllers. Do not use multiple gauges of
cable on the same communication bus, as this may
also result in communication errors.
Selecting Network Terminators
Topology
Bus
Free
Part #
PDIDI-BT-TP10XX
PDIDI-FT-TP10XX
Figure 21: Memory Erase Jumper Location (J4) on
SLX-PC-203 and SLX-PC-300.
For a bus topology, two network terminators are required
(one at each end of the bus topology channel). For a free
topology, one network terminator is required, and it can be
put anywhere on the channel.
11. Memory Erase Jumper
Each controller features a memory erase jumper that can be
used to erase the Neuron chip’s memory. If an incorrect APB
file is loaded into the controller, the Neuron chip's memory will
be corrupted and no communication with the controller will be
possible. The memory erase jumper can be used to correct this
problem by resetting the Neuron chip’s memory; the chip will
then be in an application-less state. The memory erase jumper
is labeled J2 on the ASCs, J4 on the SLX-PC-203 and SLXPC-300, and J20 on the SLX-PC-400 models and SLX-PC-500
models.
To erase the Neuron chip's memory using the memory erase
jumper, do the following:
1. Disconnect the power to the controller.
2. Place a jumper on the proper pins on the controller.
Figure 22: Memory Erase Jumper Location (J20) on
SLX-PC-400 and SLX-PC-500.
3. Reconnect power to the controller.
4. The orange-colored service LED will blink rapidly indicating
that it is erasing the Neuron chip's memory. When the
service LED stops blinking and remains solid, the erase
procedure is complete. The erase procedure typically takes
between 2 and 10 seconds.
5. Disconnect the power to the controller and remove the
jumper.
6. Reconnect the power. The service LED will blink twice and
become solid indicating that the controller is applicationless.
The proper APB (using the Commission or Load option in
LNS, e.g. SLX Series LMT) can now be loaded into the
controller.
12. Maintenance
Turn off power before any kind of servicing.
Each controller requires minimal maintenance, but it is
important to take note of the following:
Figure 20: Memory Erase Jumper Location (J2)
on SLX-ASC Models.
- If it is necessary to clean the outside of the front plate
and/or the inside of the back plate, use a dry cloth.
- Verify the tension of all wires and cables whenever the
controller is serviced.
Page 6 of 9
SLX Series
Document No. 997-1000
Installation Instructions
February 12, 2009
13. Disposal
The Waste Electrical and Electronic Equipment (WEEE)
Directive sets out regulations for the recycling and disposal of
products. The WEEE2002/96/EG Directive applies to
standalone products, ie. products that can function entirely on
their own and are not a part of another system or piece of
equipment.
For this reason SLX Series products are exempt from the
WEEE Directive. Nevertheless, they are marked with
the WEEE symbol, indicating that disposal of the
devices shall not be done together with municipal
waste.
Products must be disposed of at the end of their useful life
according to local regulations and the WEEE Directive.
SLX Series
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Document No. 997-1000
Installation Instructions
February 12, 2009
14. Typical Rooftop Application Wiring Diagram
Page 8 of 9
SLX Series
Document No. 997-1000
Installation Instructions
February 12, 2009
15. Troubleshooting Guide
Controller is powered but does not turn on
Fuse has blown (Auto-reset fuse)
Power supply polarity
Disconnect the power, the input and the output terminals. Then wait a few seconds to allow the auto-reset
fuse to cool down. Check the power supply and check input and output wiring. Reconnect the power.
Verify that consistent polarity is maintained between all controllers and the transformer. Ensure that the
COM terminal of each controller is connected to the same terminal on the secondary side of the
transformer. See Figure 3.
Controller cannot communicate on a FTT network
Absent or incorrect supply voltage
Overloaded power transformer
Network not wired properly
Absent or incorrect network termination
Incorrect APB file has been loaded
Service pin not working
1. Check power supply voltage between 24VAC/DC ±15% and COM pins, and ensure that it is between
acceptable limits.
2. Check for tripped fuse or circuit breaker.
Verify that the transformer used is powerful enough to supply all controllers.
Double check that the wire connections are correct.
Check the network termination(s).
Use the memory erase jumper to reset the Neuron chip's memory, then load the proper APB into the
controller using a network management tool (e.g. LMT).
Controller communicates well over a short network, but does not communicate on large network
Network length
Wire type
Network wiring problem
Absent or incorrect network termination
Extra capacitance
Number of devices on network segment
exceeded
Network traffic
Check that the total wire length does not exceed the specifications of the Junction Box and Wiring
Guideline for Twisted Pair LonWorks Networks.
Check that the wire type agrees with the specification of the Junction Box and Wiring Guideline for Twisted
Pair LonWorks Networks.
Double check that the wire connections are correct.
Check the termination(s). Incorrect or broken termination(s) will make the communication integrity
dependent upon a controller’s position on the network.
Make sure that no extra capacitance is being connected to the network other than the standard FTT circuit,
and a maximum of a 3 meter stub (in bus topology).
The number of controllers on a channel should never exceed 64. Use a router or a repeater in accordance
to the Junction Box and Wiring Guideline for Twisted Pair LonWorks Networks.
Query node statistic to check errors.
Use a LON protocol analyzer to check network traffic.
Hardware input is not reading the correct value
Input wiring problem
Open circuit or short circuit
Configuration problem
Check that the wiring is correct according to this document and according to the peripheral device’s
manufacturer.
Use a voltmeter to check the voltage on the input terminal. Short circuit (0V) and Open circuit (5V).
Use the controller configuration plug-in to check the configuration of the input.
Hardware output is not operating correctly
Output wiring problem
Configuration problem
Check that the wiring is correct according to this document and according to the peripheral device’s
manufacturer.
Use the controller configuration plug-in to check the configuration of the input..
Service LED (Orange Color)
Off (does not apply to PC models)
Repeated Blink (PC models only)
On
Slow Blink
(1 sec. On, 1 sec. Off)
Fast Blink
(0.3 sec. On, 1 sec. Off)
The controller is in normal operation.
The controller is in normal operation. The LED will blink according to the controller code execution time.
The controller is application-less.
Appropriate action: Reload the APB.
The controller is unconfigured.
Appropriate action: Commission the controller.
Watchdog time out. Application corrupted.
Appropriate action: Use the memory erase jumper to reset the Neuron chip's memory, then load the proper
APB into the controller using a network management tool (e.g. LMT).
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as
design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their respective owners.
© 2009 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
Document No. 997-1000
Country of Origin: US
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