
* Setting switches 2 or 4 to ON inverts the polarity, causing the
control signal to read “100%” at 0 V and “0%” at 10 V.
This product is Listed to applicable UL®Standards and requirements by Underwriters Laboratories
Inc.
Ce produit est homologué selon les normes et les exigences UL applicables par Underwriters
Laboratories Inc.
Suitable for use in environmental air space in accordance with Section 300-22(c) of the National
Electrical Code (US, NFPA-70), and Sections 2-128, 12-010(3), and 12-100 of the Canadian
Electrical Code, Part 1, CSA C22.1.
As of the date of manufacture, the device has been tested and found to comply with specications
for CE marking.
Federal Communications Commission (FCC) Compliance Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following
conditions:(1) This device may not cause harmful interference and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Troubleshooting
The following table provides corrective actions for possible trouble situations. If further
assistance is required, please contact a Crestron customer service representative.
NOTE: When troubleshooting, keep in mind that operation is ultimately determined by
the control system program.
Crestron Electronics, Inc. Installation & Operation Guide - DOC. 6768C
15 Volvo Drive Rockleigh, NJ 07647 (2022952)
Tel: 888.CRESTRON 12.16
Fax: 201.767.7576 Specications subject to
www.crestron.com change without notice.
CAUTION: Changes or modications not expressly approved by the manufacturer responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
The product warranty can be found at www.crestron.com/warranty.
The specic patents that cover Crestron products are listed at patents.crestron.com.
Certain Crestron products contain open source software. For specic information, please visit
www.crestron.com/opensource.
Crestron, the Crestron logo, Crestron Green Light, Cresnet, and Crestron Toolbox are either trademarks
or registered trademarks of Crestron Electronics, Inc. in the United States and/or other countries. UL
and the UL logo are either trademarks or registered trademarks of Underwriters Laboratories, Inc. in the
United States and/or other countries. Other trademarks, registered trademarks, and trade names may
be used in this document to refer to either the entities claiming the marks and names or their products.
Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not
responsible for errors in typography or photography.
This document was written by the Technical Publications department at Crestron.
©2016 Crestron Electronics, Inc.
Switch Settings for Digital Input
(Crestron occupancy sensors, e.g., GLS-ODT-C500/1000/2000)
Analog Input
When using the GLS-SIM to read an analog input, set the DIP switches as shown in the
tables and wiring diagrams to congure the GLS-SIM. The analog input is rated for
0–10 Vdc, protected to a maximum of 24 Vdc, and the input impedance is 18.5k ohms.
Switch Settings for Analog Input (Read Voltage from Analog Source)
Switch Settings for Analog Input (Crestron Photocells, e.g., GLS-LCL and GLS-LOL)
Switch Settings for Analog Input (Read Resistance of Potentiometer)
Digital Output
When using the GLS-SIM as a digital output, set the DIP switches as shown in the table
and wiring diagram. The digital output is a 250mA sink from a maximum of 24 Vdc, and
catch diodes are used with “real world” loads.
Switch Settings for Digital Output (Drive a Relay Coil)
SENSOR
24 1 2 G
GLS-SIM
GLS-ODT-C
Sensor
Red
Black
Blue
INPUT
CHANNEL
DIP
SWITCH SETTING
1 1 ON
2 ON
2 3 ON
4 ON
SENSOR
24 1 2 G
10 Vdc
Reading a
voltage from an
analog source
INPUT
CHANNEL
DIP
SWITCH SETTING
1 1 ON
2 OFF*
2 3 ON
4 OFF*
* Setting switches 2 or 4 to ON inverts the polarity, causing the
control signal to read “100%” at 0 V and “0%” at 10 V.
SENSOR
24 1 2 G
GLS-SIM
Orange
GLS-LCL
Red
Black
INPUT
CHANNEL
DIP
SWITCH SETTING
1 1 ON
2 OFF*
2 3 ON
4 OFF*
SENSOR
24 1 2 G
Reading the
resistance of a
potentiometer
INPUT
CHANNEL
DIP
SWITCH SETTING
1 1 OFF
2 OFF*
2 3 OFF
4 OFF*
SENSOR
24 1 2 G
Driving a
relay coil
24 Vdc
max.
INPUT
CHANNEL
DIP
SWITCH SETTING
1 1 ON
2 OFF*
2 3 ON
4 OFF*
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
The device does not
turn on (PWR LED is not
lit).
The device is not
receiving power from a
Crestron power source.
Use the provided
Crestron power
source. Verify that the
connections are
correct.
The device is not
receiving sufcient
power.
Use the Crestron
Power Calculator to
help calculate how
much power is needed
for the system.
There is electrostatic
discharge due to
improper grounding.
Check that all ground
connections have
been made properly.
The device does not
function as expected.
The unit is not
congured correctly.
Verify that the DIP
switch settings and
sensor wiring are
correct.
The programming in the
control system is
incorrect.
Check the control
system logic, or
contact Crestron for
assistance.
* Setting switches 2 or 4 to ON inverts the polarity, causing the
control signal to read “100%” at 0 V and “0%” at 10 V.
* Setting switches 2 or 4 to ON inverts the polarity, causing the
control signal to read “100%” at 0 V and “0%” at 10 V.