
Install and Wire the Dimming Module
Install the dimming module along the right side of a single-wide enclosure and side-by-side
in the center of a double-wide enclosure. Install the dimming module next to the terminal
block and in the lowest available space.
WARNING: The dimming module may be powered from multiple circuit breakers.
CAUTION: The module contains electrostatic sensitive devices (ESDs); the unit must be
handled from the metal chassis. Do not touch the PC board or components.
• A licensed electrician must mount the terminal block and module into an
enclosure in accordance with all national and local codes.
• When connecting to an arc fault breaker, ensure the load does not exceed 1,000
watts total. Crestron certied breakers have a 2,000-watt limit.
• Install the modules after the enclosure has been completely wired. Refer to Install
the Terminal block for details.
Install the Dimming Module
1. Turn the power OFF at the circuit breaker or fuse panel.
2. Secure the dimming module to the enclosure using the four supplied self-tapping
Phillips pan head screws (8B x 1/4-inch L). Rotate the dimming module 180-degrees
when installing on the right side of a double-wide enclosure.
3. Connect the wires from the module to the terminal block. Each wire exits the module
directly in line with, and is the same color as, the terminal to which it should be
connected. Wires are prestripped to 1/2 in (13 mm). Tighten to 9 in-lb.
NOTE: Power is supplied to the dimming module from the LINE 1 connection.
Wiring the Terminal Block to the Module
(Single-Wide and Left-Side Double-Wide Enclosures)
Install the Module Interconnect Cable (Optional)
If multiple modules are installed within an enclosure, use the module interconnect cable
(supplied) to pass control system communication to the module. The illustration that
follows shows the area within a double-wide enclosure where the corners of four modules
NOTE: One wire on the module interconnect cable may be a different color from the
rest. The color has no bearing on its orientation during installation.
Using Module Interconnect Cable to Wire One Module to Another
Make the neutral, switched power, +, and - connections to the ballast.
• The 0–10 V control wires to driver attach directly to the module using 2-pin pluggable
connectors. The 0–10 V should be kept clear of the ac wiring.
• The 0–10 V wiring can be run as Class 1 or Class 2.
Test the Dimming Module Wiring:
1. Turn the power ON at the circuit breaker or fuse panel.
• The circuit breakers do not trip.
• The power is delivered to the proper loads.
• The green PWR LED on the module lights.
3. Turn the power OFF at the circuit breaker or fuse panel.
4. Repeat steps 1 through 3 for the other circuit breaker or fuse panel.
Remove the Bypass Jumpers
NOTE: Before removing the bypass jumpers, make sure to properly connect and
program the control system that provides functionality to the system.
1. Turn the power OFF at the circuit breaker or fuse panel.
2. Remove the bypass jumpers on the black and red sections of the terminal block. The
jumpers on the white sections of the terminal block must remain installed.
Removing the Bypass Jumpers after Testing (Single-Wide and Left-Side Double-Wide
Enclosures and Right-Side Mounted CLT-2DIMFLV8 Shown)
3. Turn the power ON at the circuit breaker or fuse panel.
Use the individual output controls to test the functionality of each output.
• Press the button above each 1–8 LED to toggle the load. The LED lights red to
indicate that the load is on.
• Press and hold the button above each 1–8 LED to cycle-dim the load. The LED lights
red to indicate that the load is on.
NOTE: Before using the CLX-2DIMFLV8, ensure the device is using the latest rmware.
Check for the latest rmware for the CLX-2DIMFLV8 at www.crestron.com/rmware.
Load the rmware onto the device using Crestron Toolbox software.
• SETUP - Press to identify the device when Touch Settable ID (TSID) is active.
• 1–8 - Press to toggle the load. Press and hold to cycle dim the load.
• POWER - Lights to indicate that the device is receiving power.
• NET - Lights to indicate that the device has been polled on the Cresnet network
within the last 2 seconds.
• 1–8 - The LED lights red to indicate that the load is on.
100 mA Max per output, sink or source
0-10 V uorescent ballast or LED driver (4-wire)
LED, incandescent, uorescent, MLV, ELV, HID
120 Vac, 50/60 Hz; requires one or two single-phase
feeds (may be same or different phases)
277 Vac, 50/60 Hz; requires one or two single-phase
feeds (may be same or different phases)
32° to 104 °F (0° to 40 °C)
10% to 90% RH (noncondensing)
The following table provides corrective actions for possible trouble situations. If further
assistance is required, please contact a Crestron customer service representative.
CLT-2DIMFLV8 and CLX-2DIMFLV8 Troubleshooting
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
not on. No LEDs are lit on
LINE1 breaker is off. Check the breaker.
The internal fuse for LINE
1 may have blown due to a
short circuit on a switched
Find and correct the short.
Contact Crestron customer
LINE 2 breaker is off Check the breaker.
The internal fuse for LINE
2 may have blown due to a
short circuit on a switched
Find and correct the short.
Contact Crestron customer
channel stay at a dim level.
may be shorted to ground.
connections to identify the
error code 2-1 (2 ashes,
pause, 1 ash, long pause,
One or more 0-10 V outputs
connections to identify the
Perform the following basic steps to troubleshoot 0–10 V driver or ballast issues.
• Apply bypass jumpers so that all xtures are energized.
• Disconnect the purple and gray wires (0–10 V control) from the module. The xtures
should go to full brightness. If xtures do not go to full brightness, then one of the
• There is a short in the wiring (purple to gray).
• A ballast or driver has the purple and gray wires reversed.
• One or more purple and one or more gray wires are shorted to ground.
• There is a faulty driver or ballast.
• Create a short by connecting the purple and gray wires. The xtures should go to
their minimum brightness. If a xture does not dim down, then one of the following
• There is a break in the gray or purple control wires.
• There is a faulty driver or ballast.
Visit the product page on the Crestron website
(www.crestron.com) for additional information and
the latest rmware updates. Click the QR code or
use a QR reader application on your mobile device
CLT-2DIMFLV8 CLX-2DIMFLV8
This product is Listed to applicable UL
Standards and requirements tested by Underwriters
Ce produit est homologué selon les normes et les exigences UL applicables par Underwriters
Federal Communications Commission (FCC) Compliance Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two 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.
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 when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio communications. Operation of
this equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Industry Canada (IC) Compliance Statement
The product warranty can be found at www.crestron.com/warranty.
The specic patents that cover Crestron products are listed at www.crestron.com/legal/patents.
Certain Crestron products contain open source software. For specic information, please visit
www.crestron.com/opensource.
Crestron, the Crestron logo, 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.
©2018 Crestron Electronics, Inc.
Crestron Electronics, Inc. Installation Guide - DOC. 7840D
15 Volvo Drive, Rockleigh, NJ 07647 (2047538)
Fax: 201.767.7576 Specications subject to
www.crestron.com change without notice.