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Installation Sheet

RDM-ZC50 Zero Cross Module

6000 W

The RDM-ZC50 Zero Cross Module is a 6000 W solid-state zero-cross 
relay built for extra large loads. It is designed for use with the RDA series of 
enclosures, in an AMX Lighting™ modular digital dimming system. The 
RDM-ZC50 module's 120 VAC and 277 VAC ratings are CE, UL, and C-UL 
approved.  

RDM-ZC50 UL and C-UL Ratings

120-277 VAC, 6000 W

Suggested Switched Loads

Incandescent

Electronic transformers

HID ballast

Fluorescent ballast

Specifications

Dimensions (HW):  10.00" x 2.75" (25.40 cm x 6.99 cm)

Non-phase dependant

Use 75°C (167°F) copper conductors only

Torque terminals to 16 in-lbs. (7.25 kg-m)

Max. wire size:  6 AWG; 14 AWG min.

Wire stripping length: 0.35" (9 mm)

Weight:  1.0 lb. (0.45 kg)

BTU/hr: 400

Control current: 45 mA @ 12 VDC

Caution: Pre-Installation Notes

All Class 1 wiring must be connected to proper terminals.

All control wiring must be connected to proper terminals.

Disconnect power while installing or connecting the unit.

Keep top and bottom air vents clear at all times.

Test loads for shorts before connecting.

Run all low-voltage and control wires away from heat producing parts 

of the dimmer.

Each dimming circuit must have a separate neutral connection.

All electrical ratings are for continuous duty.

AC lighting loads only.

For indoor use only.

This module may require extra power from the AXlink connection or an 

external power supply connected to the control card.

Connecting the RDM-ZC50 to the AMX Lighting Master

Lighting Application Drawing

FIG. 1  RDM-ZC50

Low-voltage control
wiring: 4-pin controller
to AMX Lighting master
controller

Zero cross relay

Line in (hot)

Load out

High-voltage
connections

Mounting points

FIG. 2  RDM-ZC50 connections

FIG. 3  RDM-ZC50 wiring configuration

Pin 4 (GND)

Pin 3 (RLY)
Pin 2 (DIM)

Pin 1 (+12 V)

3 (-)

1 (+)

RDM-ZC50 4-pin module connector

4-pin plug from RDM series module

NOTE: The 4-pin plugs from the module connector to
the 4-pin connector on the master (black plug cover facing up).

 

Ballast 

 

Circuit breaker
panel

 

Neon lights

(cold-cathode, on/off)

Neutral

Load

All neutrals are common
to the Neutral block in the
enclosure. Provide a 
separate neutral for 
each load.

Load

Neutral

Fluorescent Lighting

Line in (HOT)

Load

Neutral

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