Crestron CLX-2DIMU8-277 Manual

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Side 1/2

Quick Start

Control up to eight channels of dimmed lighting using the Crestron®

CLX-2DIMU8-277 module. The CLX-2DIMU8-277 supports two 277

VAC line power inputs and can dim LED, incandescent, magnetic

low-voltage, electronic low-voltage, and 2-wire dimmable fluorescent

lighting loads. The CLX-2DIMU8-277 auto-detects the dimmed load

type and selects the appropriate operating mode for each channel.

The CLX-2DIMU8-277 pairs with the CLT-2DIMU8-277 terminal block to

facilitate simple wiring. The CLT-2DIMFLV8-277 ships separately from

the CLX-2DIMFLV8-277 to allow termination and testing of the field

wiring prior to the installation and setup of the CLX-2DIMFLV8-277.

The CLT-2DIMU8-277 and CLX-2DIMU8-277 install in a CAEN enclosure

as part of a complete Crestron centralized lighting control system.

Check the Box

Item Qty

CLX-2DIMFLV8-277 1

Cable, Interconnect (P/N 4500250) 1

Screw, 8-8B x 1/4 in., Pan Head, Phillips (P/N 2007277) 4

CLT-2DIMFLV8-277 1

Label, Terminal Block, CLT-2DIMFLV8, 277V, Left

(P/N 4524249)

Label, Terminal Block, CLT-2DIMFLV8, 277V, Right

(P/N 4524250)

Screw, 8-8B x 1/4 in., Pan Head, Phillips (P/N 2007277) 2

Installation Overview

Unless otherwise indicated, the lighting system specified in this guide

is modular, requiring assembly in the field by a licensed electrician in

accordance with all national and local codes.

If an assembled UL® Listed panel is required, Crestron offers this

service through its UL Listed panel shop. This includes complete

in-factory system configuration and assembly by Crestron for an

additional fee.

WARNING:

• The CLT-2DIMU8-277 and CLX-2DIMU8-277 may be powered

from multiple circuit breakers.

• A licensed electrician must mount the CLT-2DIMU8-277 and

CLX-2DIMU8-277 into the CAEN 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 certified breakers have a

2,000-watt limit.

CAUTION: This equipment is for indoor use only and needs to be air

cooled. Mount 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% (noncondensing).

IMPORTANT NOTES: When controlling magnetic low-voltage

transformers:

• Do not use a CLX-2DIMU8-277 module for switching or dimming

large magnetic transformers (>100 VA).

• Do not connect more than eight magnetic transformers on any

one output, regardless of lamp wattage.

• Do not hot plug transformers or add or remove bypass jumpers

while the output channel is energized.

• Do not mix magnetic and electronic transformers on the same

output channel.

Failure to follow the guidelines above can lead to damage of the

dimmer module and transformers.

CLT-2DIMU8-277 and CLX-2DIMU8-277 in a Single-Wide CAEN

Enclosure

Ground bus CLT- terminal

block

CLX- module

CLT-2DIMU8-277 and CLX-2DIMU8-277 in a Double-Wide CAEN

Enclosure

Ground bus

CLT- terminal block CLT- terminal blockCLX- modules

Install and Wire the Terminal Block

Install the Terminal Block

Install the CLT-2DIMU8-277 into the lowest available space in the

CAEN enclosure. Mount additional CLT-2DIMU8-277s into the spaces

above it in ascending order.

The CLT-2DIMU8-277 installs along the left side of a single-

wide enclosure and along the outside edges of a double-wide

enclosure. Refer to the CAEN Installation Guide (Doc. 5940) at

www.crestron.com/manuals for mounting information.

1. Turn the power OFF at the circuit breaker(s) or fuse panel(s).

2. Remove the backing from the terminal block label. Align the holes

on the label with the holes on the enclosure and attach the label

to the enclosure.

• Use the Left Terminal Block Label when mounting the

CLX-2DIMU8-277 into a single-wide CAEN enclosure or into

the left side of a double-wide CAEN enclosure

• Use the Right Terminal Block Label when mounting the

CLX-2DIMFLV8-277 into the right side of a double-wide CAEN

enclosure.

3. Align the CLT-2DIMU8-277 with the terminal block label. The

colors on the CLT-2DIMU8-277 match the colors on the terminal

block label. Secure the CLT-2DIMU8-277 to the enclosure using

two 8-8B x 1/4 in. screws. The wiring label lies beneath the

terminal block.

CAUTION: Bypass jumpers are provided to test the circuits and to

protect the module during installation. When properly secured by

five screws, the jumpers on the black and red sections of the terminal

block short (connect) the line in to the dim out so that the circuit is

energized. Do not remove the 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

and Wiring” for details.

Do not remove the two jumpers on the white sections of the terminal

bock that tie the neutral in and neutral out wires.

Wire the Terminal Block

Connect the feed (Line and Neutral) and the load (controlled circuit)

wires to the terminal block. For 2-feed systems, the two power feeds

can be different phases. Follow the labeling on the wiring label.

NOTE: Use copper conductors only, rated 75 °C or greater.

When connecting wires:

• Use 14-10 AWG wire.

• Strip wire to 1/2 in (13 mm).

• Tighten the terminal blocks to 9 in-lb.

Connect the Ground wires to the ground bus inside the enclosure:

• Strip wire to 1/2 in (13 mm).

• Tighten 14-10 AWG wire to 35 in-lb.

• Tighten 8 AWG wire to 40 in-lb.

• Tighten 6-4 AWG wire to 45 in-lb.

Connect the Feed and Load wires to the CLT-2DIMU8-277

LINE 1

Line power from a

15 or 20 A circuit

breaker

N IN 1

Neutral from the

circuit breaker

N IN 2

Neutral from the

circuit breaker

GND

Ground from the

circuit breaker

Bypass

jumpers

Terminal

block

Dim and

Neutral to

loads

Left-side

wiring label

LINE 2

Line power from a

15 or 20 A circuit

breaker

Ground

bus

Module

location

label

NOTE: When wiring the terminal block on right-side double-wide

enclosures, the connection points on the label are reversed.

Test the Terminal Block Wiring:

1. Turn the power ON at the circuit breaker(s) or fuse panel(s).

2. Verify that the circuit breakers do not trip.

3. Verify that the power is delivered to the proper loads.

4. Repeat Steps 1-3 for the other circuit breaker(s) or fuse panel(s).

Install and Wire the Dimming Module

The dimming module installs along the right side of a single-wide

CAEN enclosure and side-by-side in the center of a double-wide CAEN

enclosure. Install the CLX-2DIMU8-277 next to the CLT-2DIMU8-277

and in the lowest available space. Refer to the CAEN Installation Guide

(Doc. 5940) at www.crestron.com for mounting information.

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.

NOTE: 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(s) or fuse panel(s).

2. Secure the dimming module to the enclosure using four

8-8B x 1/4 in. screws.

• The wires on the CLX-2DIMU8-277 should exit and face the

left when installing in a single-wide CAEN enclosure or on the

left side in a double-wide CAEN enclosure.

• The wires on the CLX-2DIMU8-277 should exit and face the

right when installing on the right side in a double-wide CAEN

enclosure

3. Connect the prestripped 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 inch (13 millimeters). Tighten to

9 in-lb.

NOTE: The CLX-2DIMU8-277 is powered from the LINE 1

connection.

Wiring the Terminal Block to the Module

(Single-Wide and Left-Side Double-Wide Enclosures)

Black from breaker

White from panel

Red to loads

White to loads

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 meet.

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

Module interconnect

cable attached

Connection

not made

CLT-2DIMU8-277/CLX-2DIMU8-277

Terminal Block and Module

Test the Dimming Module Wiring:

1. Turn the power ON at the circuit breaker(s) or fuse panel(s).

2. Verify the following:

• 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(s) or fuse panel(s).

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)

Jumper removed

Jumper installed

Jumper removed

Jumper installed

Jumper removed

Jumper installed

Jumper removed

Jumper installed

3. Turn the power ON at the circuit breaker or fuse panel.

Test the System

Use Local mode to verify that each load is connected to the proper

output on the modules. Refer to the illustration that follows for button

locations.

1. Press the SETUP button to enter Local mode. Output 1 turns full

on.

2. Press the mode button to cycle through the dimming modes, and

press the SETUP button to save the setting and advance to the

next output. The dimming mode is identified by the blinking LED.

• Green indicates forced reverse phase.

• Red indicates forced forward phase.

• Yellow and green indicate auto-select reverse phase.

• Yellow and red indicate auto-select forward phase.

• Red and green indicate non-dim.

3. Press the SETUP button to advance to output 2. Repeat step 2 for

the remaining outputs.

4. After turning on the last output, press the button again to SETUP

turn on all outputs and verify that they are operating correctly.

5. Press the SETUP button to turn off all outputs and LEDs and exit

Local mode.

NOTE: The dimming mode cannot be changed if the dimming

phase is set in the SIMPL program.

CLX-2DIMU8 Mode and SETUP Button Locations

Setup button

Mode button

Operation

NOTE: Before using the CLX-2DIMU8-277, ensure the device is using the

latest firmware. Check for the latest firmware for the CLX-2DIMU8-277

at Load the firmware onto the device www.crestron.com/firmware.

using Crestron Toolbox™ software.

Buttons

• 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.

LEDs

• 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.

Specifications

Specification Details

Load Ratings

Dimmer Channels

Per Channel

Per Group

Module Total

Minimum Load

SCCR

Dimming Modes

Load types

2.5A (692 W)

Channels 1-4: 10 A (2770 W)

Channels 5-8: 10 A (2770 W)

20 A (5,540 W)*

0 W

30 kA

Auto-load detection, forced reverse-phase, forced

forward-phase

LED, incandescent, MLV, ELV, 2-wire fluorescent, non-

dimmable lighting

Power Requirements One or two feeds (the same or different phases)

277 VAC, 50/60Hz, single-phase

10A max per feed

Environmental

Temperature

Humidity

Heat Dissipation

32º to 104 ºF (0º to 40 ºC)

10% to 90% RH (non-condensing)

88 Btu/h maximum

* When connecting to a third-party arc-fault breaker, ensure that the total load does not

exceed 1,000 W per feed.

Troubleshoot Symptoms

The module displays error codes using the dimmer output LEDs. The

LED blinks a pattern, such as 1-2 or 2-4, to indicate the error on that

output. For example, a 1-2 error blinks the LED 1 time, pauses for 1

second, blinks two times, pauses for two seconds, and then repeats

until the error is corrected. A 2-4 error blinks the LED blinks twice,

pauses for 1 second, blinks four times, pauses for two seconds, and

then repeats until the error is corrected. Refer to the following table for

possible corrections.

Error

Code

Error Name Fault Description

1-1 Master MCU

Stuck in

Bootloader

The firmware upgrade has failed or been aborted,

leaving the master processor in bootloader. Reinitiate

firmware upgrade from Crestron Toolbox software.

1-2 Dimming

Processor

Unresponsive

Communications to the corresponding dimming

processor have failed. Confirm that power is supplied

to LINE 2/N IN 2. Then reboot the unit or contact

Crestron customer service.

1-3 Dimming

Processor

Firmware

Upgrade Failed

The firmware upgrade has failed or been aborted,

leaving the dimming processor in bootloader. Reinitiate

the firmware upgrade from Crestron Toolbox.

2-1 Overcurrent

Tripped

A short circuit or overload has been detected and

output has been switched off.

• Check wiring for shorts.

• Verify that the total load connected to the

channel is less than 4 A.

• Verify that the dimming phase has not been

set to Forward Phase mode if an incandescent

or electronic load is connected.

The channel attempts to resume normal operation

after receiving another command to turn on.

Error

Code

Error Name Fault Description

2-2 Shorted FET The dimmer channel has failed. Disconnect the load

and contact Crestron Technical Support.

2-3 Over-

temperature

Tripped

The dimming channel has overheated and shut down

due to excessive load.

• Verify that the total load connected to the

channel is less than 4 A.

• Verify that the panel ventilation is not blocked.

The channel resumes normal operation after cooling.

2-4 Overvoltage

Detected

High voltage spikes have been detected and output

has been shut down.

If a magnetic load is connected, verify that the

dimming phase has been set to Forward Phase mode.

3-1 Zero Cross

Fault

The dimmer is unable to lock onto the ac line.

If the unit is powered by a generator, verify that

generator output is 50/60 Hz and stable.

The following table provides corrective action for possible trouble

situations. If further assistance is required, please contact a Crestron

Customer service representative.

Symptom Issue Action

The output does not

appear to dim below

50%.

The dimmer channel

may have been

damaged.

Contact Crestron customer

service.

The connected LED

load buzzes and

flickers when dimmed.

An incompatible LED

fixture is installed.

Verify the connected LED load

is dimmable and has been test-

ed. Refer to Crestron’s Light

Fixture Compatibility Listing at

www.crestron.com/resources/

lighting-fixture-compatibility.

An incorrect dimming

phase is selected.

Set the dimming phase to

Auto or Reverse Phase mode to

reduce current spikes to load.

The connected LED

load flickers or turns

off when dimmed to a

low level.

The minimum

dimming level is set

too low.

Adjust the minimum dimming

level to match the minimum

level required by the LED load.

The LED load does

not dim to a low

brightness level.

An incorrect dimming

phase is selected.

Set the dimming phase to

Forward Phase mode.

For Additional Information

Scan or click the QR code for detailed product information.

CLT-2DIMU8-277 CLX-2DIMU8-277

Compliance and Legal

This product is Listed to applicable UL® Standards and requirements tested by Underwriters

Laboratories Inc.

Ce produit est homologué selon les normes et les exigences UL applicables par Underwriters

Laboratories Inc.

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.

CAUTION: Changes or modifications 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 A

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

CAN ICES-3(A)/NMB-3(A)

The product warranty can be found at www.crestron.com/warranty.

The specific patents that cover Crestron products are listed at

www.crestron.com/legal/patents.

Certain Crestron products contain open source software. For specific 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.

Crestron Electronics, Inc.

15 Volvo Drive, Rockleigh, NJ 07647

Tel: 888.CRESTRON

Fax: 201.767.7576

www.crestron.com

Quick Start - Doc. 7850C

(2053069)

11.18

Specifications subject to

change without notice.

Produkt Specifikationer

Mærke:	Crestron
Kategori:	Ikke kategoriseret
Model:	CLX-2DIMU8-277
Type:	Lysdæmper
Vekselstrømsindgangsspænding:	277 V
Bredde:	176 mm
Dybde:	87 mm
Højde:	194 mm
Relativ luftfugtighed ved drift (H-H):	10 - 90 %
Driftstemperatur (T-T):	0 - 40 °C