Crestron electronic GLS-LCL Manual De Usuario

Crestron GLS-LCL

CLOSED-LOOP PHOTOCELL LIGHT SENSOR

Operations & Installation Guide

If you cannot locate specific information or have questions after reviewing this guide, please take 

advantage of Crestron's award winning customer service team by calling Crestron at 

1-888-CRESTRON [1-888-273-7876].

You can also log onto the online help section of the Crestron website (www.crestron.com/onlinehelp) to 

ask questions about Crestron products. First-time users will need to establish a user account to fully 

benefit from all available features.

As Crestron improves functions, adds new features and extends the capabilities of the GLS-LCL units, 

additional information may be made available as manual updates. These updates are solely electronic 

and serve as intermediary supplements prior to the release of a complete technical documentation 

revision.

Check the Crestron website periodically for manual update availability and its relevance. Updates are 

identified as an “Addendum” in the Download column.

This device complies with part 15 and part 18 of the FCC rules. Operation is subject to the following 

two conditions: (1) This device must not cause harmful interference, and (2) This device must accept 

any interference received, including interference that may cause undesired operation.

The GLS-LCL Closed-Loop Photocell responds to ambient light 

levels within an occupied space and provides an analog voltage 

proportionate to the ambient light level.

The ambient light measured is the light from any light source in the 

visible spectrum. The photocell does not distinguish between natural 

sunlight and artificial light. It contains a sensor which is color and 

spatially corrected to provide a true representation of changes in 

lighting levels that the human eye perceives.

The sensor measures the ambient light that actually falls upon it 

within a 60º cone extending downward from the sensor (refer to 

“Field of View” illustration on the second page). This is the light that 

gets reflected to the ceiling from the walls, floor and furniture.

 

NOTE: Care must be taken when choosing the mounting location.

It is recommended that the sensor be mounted directly above the 

work space, such as a desk, conference table or computer terminal.

Mounting location is important because the ambient light level will 

be different at different points in the room, depending on the location 

of the windows, lighting fixtures, wall colors, etc. The ambient light at 

the doorway can be much less than that at the windows, corners of 

the room, or especially on the ceiling. Therefore, it is important to 

measure the ambient light level over the workplace.

• 

To be installed and/or used in accordance with appropriate electrical codes and 

regulations.

•  If you are unsure about any part of these instructions, consult a qualified electrician.

When wiring the Cresnet

®

 network, consider the following:

• 

Use Crestron Certified Wire.

•  Use Crestron power supplies for Crestron equipment.

• 

Provide sufficient power to the system.

CAUTION: Insufficient power can lead to unpredictable results or damage to the 

equipment. Please use the Crestron Power Calculator to help calculate how much power 

is needed for the system. (www.crestron.com/calculators).  

WARNING: To avoid fire, shock, or death; turn off power at circuit breaker or fuse and 

test that power is off before wiring!

NOTES: Observe the following points regarding sensor installation.

Strip the ends of the wires approximately 1/2”. Use care to avoid nicking the conductors. 

Twist together the ends of the wires that share a connection and tin the twisted 

connection. Apply solder only to the ends of the twisted wires. Avoid tinning too far up 

the wires or the end becomes brittle. 

The GLS-LCL can either be fastened onto the ceiling surface, flush 

mounted into the ceiling, or installed in a 4 inch (10.2 cm) round or 

octagonal outlet box, depending on ceiling material and local codes.

 

1.  To fasten the photocell to the ceiling surface, attach the outer 

shell provided to the ceiling at the desired location using two 

#4 screws and appropriate anchor hardware, where neces-

sary. For concealed wiring, access to the space above the 

ceiling is required, as well as a hole in the ceiling above the 

photocell to connect the wires from the optional GLS-SIM or 

other Crestron interface device. 

 

  Make all connections as described in Steps 3 through 8. 

Carefully feed the wires into the hole and press the Photocell 

body into the outer shell until the rim is flush with the shell.

NOTE: If wiring is to be run exposed along the ceiling, carefully 

trim the plastic from the indentation in the side of the outer shell 

and lay the photocell wires through it before tightening the shell 

onto the ceiling.  

 

2.  To flush mount into the ceiling (only allows concealed wiring, 

the outer shell is not used), cut a 2 inch (5.1 cm) diameter 

hole through the ceiling. Make all connections as described in 

Steps 3 through 8. Carefully feed the wires back through the 

hole and press the GLS-LCL into the hole until the rim is flush 

with the ceiling. 

Crestron Electronics, Inc. 

 

15 Volvo Drive   Rockleigh, NJ 07647 

Tel: 888.CRESTRON 

Fax: 201.767.7576  

Specifications subject to 

www.crestron.com 

change without notice.

Power Consumption

1W (42mA @ 24VDC)

Field of View Coverage

60° Cone

Output

0 - 10VDC (0 - 70 footcandles)

Recommended Mounting Location

Directly above work space