
Terminal Block and Module
2-feed, 8-dimmer terminal block and module (CLT-2DIM8 and CLX-2DIM8)
are a single entity and must be used together. They ship separately so that the terminal
block (CLT-2DIM8) wiring can be accomplished before module (CLX-2DIM8) installation.
The terminal block is designed to terminate the circuit feed (line and neutral) and distribute
the controlled circuit (load) to the fixtures. The module connects to the terminal block and
performs dimming control of eight incandescent, magnetic low voltage, neon/cold cathode,
or dimmable 2-wire fluorescent lighting loads.
The maximum load for the CLX-2DIM8 is 16 A per channel, 32 A total. The CLX-2DIM8
accepts two 16 A feeds that must be the same phase or split phase. The unit requires
120 Vac 50/60 Hz, 1 phase input voltage.
An oversized heat sink dissipates heat efficiently. There are LEDs on the module to
indicate communication with a Cresnet
network, input power to the module, and output
The CLT-2DIM8 terminal and CLX-2DIM8 module are shown in the following illustrations.
CLT-2DIM8 Terminal Block with Left- and Right-Side CLX-2DIM8 Wiring Labels
Visit the product page on the Crestron website (www.crestron.com) or
scan the QR code to the right for additional information and the latest
NOTE: Before using the CLX-2DIM8, ensure the device is using the latest rmware.
Check for the latest rmware for the CLX-2DIM8 at www.crestron.com/rmware.
Firmware is loaded onto the device using Crestron Toolbox™.
The terminal block and module must be mounted into a Crestron Automation Enclosure by
a licensed electrician and in accordance with all national and local codes.
CAUTION: This equipment is for indoor use only and needs to be air-cooled. Mount it in
a well-ventilated area. The ambient temperature must be 32° to 104° F (0° to 40° C). The
relative humidity must be 0% to 90% (non-condensing).
NOTE: The two input lines must be the same phase or split phase.
NOTE: When connecting to an arc fault breaker, the load should not exceed 1,000 watts
total. Crestron certied breakers have a 2,000 watt limit.
Terminal blocks are installed along the left side of single-wide enclosures and along the
outside edges (left and right sides) of double-wide enclosures. Modules are installed along
the right side of single-wide enclosures and side-by-side in the center of double-wide
enclosures. When installing modules and terminal blocks in a double-wide enclosure, be
sure to invert the units on the right side so that they can be properly wired. Refer to the
illustrations that follow when considering the location of terminal blocks and modules within
NOTE: Modules and terminal blocks must be installed into the lowest available spaces
and continue toward the top of the enclosure.
When using electrical equipment, basic safety precautions should always be followed
READ AND FOLLOW ALL SAFETY INSTRUCTIONS.
● Do not mount near gas or electric heaters.
● Equipment should be mounted in locations and at heights where it will not be subjected
to tampering by unauthorized personnel.
● The use of accessory equipment not recommended by the manufacturer may cause an
● Do not use this equipment for other than its intended use.
● All servicing should be performed by qualified service personnel.
● If any Emergency Circuits are fed or controlled from this panel, it must be located
electrically where fed from a UPS, generator, or other guaranteed source of power
during emergency and power outage situations.
Terminal Block and Module Layout for a Double-Wide Enclosure
CLX-2DIM8 Module (Connects to a CLT-2DIM8)
NOTE: Unless otherwise indicated, the lighting system specied in this guide is modular,
requiring assembly in the eld by a licensed electrician in accordance with all national and
If an assembled UL Listed panel is required, it can be obtained through Crestron’s UL
Listed panel shop. This includes complete in-factory system conguration and assembly
by Crestron for an additional fee.
Terminal Block Installation and Field Wiring
Apply the supplied adhesive label before installing the terminal block. The adhesive label
provides the labeling for each terminal in the terminal block and is designed to accomodate
installation into the left or right side of a cabinet.
WARNING: The CLX-2DIM8 may be powered from multiple circuit breakers.
NOTE: Both left-side and right-side adhesive wiring labels are provided. The left-side
labels are used in both single- and double-wide enclosures. The right-side labels are only
used in double-wide enclosures.
1. Remove the backing from the left- or right-side adhesive wiring label.
2. Apply the adhesive label by aligning the holes in the label with the holes on the
Crestron Automation Enclosure where the terminal block is to be mounted. The wiring
label lies beneath the terminal block as shown in the following diagrams.
3. Use the two supplied self-tapping Phillips pan head screws (8B x 1/4 inch length) to
secure the terminal block to the Crestron Automation Enclosure.
CAUTION: Bypass jumpers are provided to test circuits and to protect the module
during installation. When properly secured by five screws, each of the two jumpers
on the black and red sections of the terminal block shorts the line in to dim out so
that the circuit is energized. Do not remove any bypass jumpers until all feed and
load wiring has been completed, the circuit has been tested for electrical faults, and
the module has been installed. Refer to “Module Installation.”
Furthermore, the two jumpers on the white sections of the terminal block tie the
neutral ins to the neutral outs. These jumpers should never be removed.
NOTE: Use copper conductors only—rated 75° C or greater.
4. Turn off the circuit breakers.
5. Connect the circuit feed (line and neutral) and controlled circuit (load) wires to the
terminal block per the markings provided on the wiring label (as shown in the following
diagrams). Terminal blocks accept one 14–10 AWG wire. Strip the wires to 1/2 inch
(13 millimeters). Tighten terminal blocks to 9 in-lbs.
6. Terminate the ground wires at the grounding terminal blocks that are available in the
cabinet. Tighten the grounding terminal blocks to 35 in-lbs (14–10 AWG), 40 in-lbs
(8 AWG), or 45 in-lbs (6–4 AWG).
7. Test each circuit for electrical faults by turning on each of the circuit breakers and
checking that the breakers do not trip and that power is delivered to the proper loads.
Wiring the Terminal Block to the Feed and Load(s)
(Single-Wide and Left-Side Double-Wide Enclosures)
Wiring the Terminal Block to the Feed and Load(s) (Right-Side Double-Wide Enclosures)
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.
Install the modules after the terminal blocks are installed and the enclosure has been
1. Use the four supplied self-tapping Phillips pan head screws (8B x 1/4 inch length) to
secure the module to the enclosure.
2. As shown in the wiring diagrams on the next page, 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
pre-stripped to 1/2 inch (13 millimeters). Tighten to 9 in-lbs.
3. If the module is being installed above another module within the enclosure, attach
the supplied module interconnect cable to the two modules. The illustration that
follows shows the area within a double-wide enclosure where the corners of four
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.
Use Module Interconnect Cable to Wire One Module to Another
4. Turn on the circuit breakers and verify that the green PWR LED on the module lights,
the breakers do not trip, and power is delivered to the loads.
5. Turn off the circuit breakers.
NOTE: Before the bypass jumpers are removed, the control system that provides
functionality to the system should be properly connected and programmed.
6. 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. Refer to
the gures that follow for reference.