Installation Instructions
Document No. 997-1005
February 23, 2009
SLX Series
Room Sensor – LED, Override Button and Setpoint Adjustment (°F)
(SLX-RTS-SLO-F)
- The device is designed to operate under the following
1. Product Description
The SLX-RTS-SLO-F wall sensor is designed to interface
with any fan coil, heat pump, rooftop or terminal
heating/cooling unit. The device provides precision local
temperature sensing with the capability of local setpoint
adjustment.
The sensor has a built-in communications jack allowing the
®
user to connect to the LON network directly from the
sensor. This is an extremely convenient feature when
calibrating VAV controllers, enabling the user to connect a
computer or hand-held device to the LON network.
environmental conditions:
ƒ Ambient temperature from 32°F to 158°F (0°C to
70°C)
ƒ Relative humidity from 0% to 95%, non-condensing.
- Ensure proper ventilation of device and avoid areas
where corroding, deteriorating or explosive vapors,
fumes or gases may be present. The device must be
oriented with the ventilation slots towards the top to
permit proper heat dissipation.
Take
reasonable
precautions
to
prevent
electrostatic discharges to the device when
installing, servicing or operating the device.
Discharge accumulated static electricity by
touching one’s hand to a securely grounded object
before working with this device.
Alternatively, if the communication jack is connected to the
SMRT inputs of an SLX-ASC-AVAV, then an SLX-STATVAV (used as a hand-held balancing tool) can plug into the
communications jack to perform SLX-ASC-AVAV calibration.
The modern, sleek profile enclosure is suitable for
classrooms, hotels, executive areas, office spaces and other
commercial areas. Mounting hardware with a separate subbase is provided with the device for installation on drywall or
on a 2” × 4” electrical junction box.
This document describes the hardware
procedures for the SLX-RTS-SLO-F:
installation
3. General Wiring Recommendations
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 the device, use the terminal
connectors which are located inside the device’s
enclosure. Use a small flat screwdriver to tighten the
terminal connector screws once the wires have been
inserted.
- The board connectors accept wires or flat cables
ranging from 22 to 14 AWG (0.644-1.630 mm diameter)
per pole.
- It is recommended that all terminals be wired by 18
AWG wire except for LON communications.
4. Mounting Instructions
The SLX-RTS-SLO-F has been specially designed for easy
installation. However, certain conditions apply when
choosing a suitable location for the device:
Figure 1-1: SLX-RTS-SLO-F Sensor.
- The device should not be installed on an exterior wall.
- The device should not be installed near a heat source.
- The device should not be installed near an air discharge
grill.
2. General Installation Requirements
- The device should not be installed in a place were it can
For proper installation and subsequent operation of the
SLX-RTS-SLO-F, pay special attention to the following
recommendations:
- Install the device in an area that provides proper device
- Upon unpacking the product, inspect the contents of the
carton for shipping damages. Do not install damaged
devices.
- Allow for proper clearance of device enclosure and
wiring terminals for easy access, hardware configuration
and maintenance.
SLX Series
be affected by the sun.
ventilation. Nothing must restrain air circulation to the
device.
The SLX-RTS-SLO-F has not been designed for
outdoor use.
Page 1 of 4
Document No. 997-1005
Installation Instructions
February 23, 2009
Installation procedure
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Remove the security screw from the device (Figure 5-1).
Open the device by pressing in the two (2) tabs on the
bottom of the device and pulling the bottom side of the
front plate outwards.
Flip the printed circuit board over to access the
mounting hole.
Pull all cables 6” out of the wall, and insert them through
the central hole of the back plate.
Align the back plate with the wall and mark the location
of the two mounting holes on the wall. Make sure to
orient the proper side of the back plate facing upwards.
Remove the back plate and drill holes in the wall if
necessary.
Install anchors in the wall if necessary.
Make sure that the mounting surface is flat and clean.
Screw the back plate onto the wall. Do not overtighten.
Strip each wire 1/4” and insert each one according to
the wiring diagrams shown in this document.
Gently push excess wiring back into the wall.
Flip the printed circuit board back into place.
Reattach the front plate and make sure it clips tightly
into place.
Install security screw.
Figure 6-1: SLX-RTS-SLO-F Wiring Terminals.
5. Device Components
Figure 6-2: SLX-RTS-SLO-F Terminal Description.
Wiring a 10K Ω Thermistor
Terminals 1 and 2 are used for the 10K Ω type 2 NTC
thermistor, as well as for the override button
Figure 6-3: 10K Ω NTC Thermistor Input.
The override button creates a short circuit on the
controller input, which is interpreted as an override
signal.
Wiring a 10K Ω Setpoint Potentiometer
Figure 5-1: Mounting an SLX-RTS-SLO-F.
6.
Terminals 3 and 4 are used for the 10K Ω setpoint
potentiometer.
Device Wiring
The SLX-RTS-SLO-F has physical connections for up to four
different features depending on the model. The following
table identifies how the sensor's terminals are used:
SLX-Sensor Feature
Thermistor
Averaging Thermistor
Setpoint Potentiometer
LED
Communications Jack
Page 2 of 4
Figure 6-4: 10K Ω Setpoint Potentiometer Input.
Associated Terminals
1&2
2&3
3&4
5&6
Communications Terminals
(1 & 2)
SLX Series
Document No. 997-1005
Installation Instructions
February 23, 2009
If both the 10K Ω Type 2 NTC thermistor and 10K Ω
setpoint potentiometer are being wired to the same
controller, only three wires are required. Connect terminal
2 to terminal 3.
Figure 6-5: 10K Ω NTC Thermistor and Setpoint
Potentiometer Inputs.
Wiring a Status LED indicator
Terminals 5 and 6 are used to connect a controller output
to the status LED indicator.
Figure 6-6: Status LED Indicator Input.
Wiring an SLX-STAT to a VAV for VAV Balancing
The SLX-STAT-VAV can be used as a hand-held device to
perform VAV balancing. The communications terminals (1
and 2) within the SLX-RTS-SLO-F must be connected to the
SMRT+ and SMRT- inputs of the VAV before the
communications jack can be used.
Wiring an SLX-RTS-SLO-F to a LON Network for
Technician Use
The communications terminals (1 and 2) within the SLXRTS-SLO-F can be optionally wired to the LON terminals of
a controller. If inserting multiple wires in the terminals,
ensure to properly twist wires together prior to inserting them
in the terminal connectors.
A laptop can then access the LON network by plugging into
the SLX-RTS-SLO-F communications jack with am 1/8"
audio cable at any time.
To wire a computer to the LON network via an SLX-RTSSLO-F, do the following:
1. Remove the front plate of the SLX-RTS-SLO-F.
2. Connect the communication terminals (1 and 2) of the
SLX-RTS-SLO-F to the LON1 and LON2 input terminals
on the controller.
3. Connect the two (2) wires that terminate with the 1/8"
audio cable to the output terminals of the PCLTA card on
the computer (other methods of connecting to the
computer are possible).
4. Insert the 1/8" audio cable into the communications jack
of the EC-Sensor.
To wire an SLX-STAT-VAV to a VAV via an SLX-RTS do the
following:
1. Remove the front plate of the SLX-RTS-SLO-F
2. Connect the communications terminals (1 and 2) to the
SMRT+ and SMRT- terminals of the VAV controller.
3. Remove the front plate of the SLX-STAT-VAV.
4. Connect the two (2) wires that terminate with the 1/8"
audio cable to the T1 and T2 output terminals of the SLXSTAT-VAV.
5. Insert the 1/8" audio cable into the communications jack
of the SLX-RTS-SLO-F.
VAV Controller
SMRTSMRT+
PL0168R1
EC-Sensor
2
1
1/8" Com. Jack
SMRT
SLX-STAT
T2
T1
Figure 6-7: Wiring SLX-STAT to a VAV
for VAV Balancing.
SLX Series
Figure 6-8: Wiring SLX-RTS-SLO-F to a LON Network for
Technician Use.
The recommended cable type for LON communications is 22
AWG (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, special care must be taken when
connecting the LON network to avoid short circuit.
For more information and detailed explanations on network
topology and wire length restrictions, please refer to the
Junction Box and Wiring Guideline for Twisted Pair
LonWorks® Networks, published by Echelon® Corporation.
• If the distance between the SLX-RTS-SLO-F
and the controller (stub length) is less than 10 ft
(3 m) a bus topology must be used. If the stub
length is greater than 10 ft (3 m) a free topology
in a daisy manner must be used.
Page 3 of 4
Document No. 997-1005
Installation Instructions
February 23, 2009
7. Troubleshooting Guide
Device 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
Verify that the total wire length does not exceed the specifications of the Junction
Box and Wiring Guideline for Twisted Pair LonWorks Networks.
Verify that the wire type agrees with the specification of the Junction Box and
Wiring Guideline for Twisted Pair LonWorks Networks.
Verify that the wire connections are correct.
Verify the termination(s). Incorrect or broken termination(s) will make the
communication integrity dependent upon a device’s position on the network.
Verify that no extra capacitance is being connected to the network other than the
standard FTT circuit and that there is a maximum stub length of 10 feet (3 m) in
bus topology.
The number of devices 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
Verify that the wiring is correct according to this manual and according to the
peripheral device’s manufacturer.
Using a voltmeter, check the voltage on the input terminal. Short circuit (0V) and
open circuit (5V).
Refer to the device’s user guide for more information.
Hardware output is not operating correctly
Output wiring problem
Configuration problem
Verify that the wiring is correct according to this manual and according to the
peripheral device’s manufacturer.
Refer to the device’s user guide for more information.
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. 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. 997-1005
Country of Origin: US
Page 4 of 4