Installation Sheet
RDM-2ZC Dual Zero Cross Module
2400 W
The RDM-2ZC Dual Zero Cross Module is a dual 2400 W zero-cross relay
built for long term, reliable switching of electronic fluorescent ballasts, elec-
tronic transformers and incandescent lamps. It is designed for use with the
RDA series of enclosures, in an AMX Lighting™ modular digital dimming
system. The module's 120, 240, and 277 VAC ratings are CE, UL, and C-
UL approved.
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This module may require extra power from the AXlink connection or an
external power supply connected to the control card.
Connecting the RDM-2ZC to the AMX Lighting Master
Pin 4 (GND)
Pin 3 (RLY)
Pin 2 (DIM)
Mounting
points
Pin 1 (+12 V)
RDM-2ZC 4-pin module connector
Line in (hot)
3 (-)
High-voltage
connections
1 (+)
4-pin plug from RDM series module
Load out
NOTE: The 4-pin plugs from the module connector to
the 4-pin connector on the master (black plug cover facing up).
FIG. 2 RDM-2ZC connections
Zero cross relay A
Lighting Application Drawing
All neutrals are common
to the Neutral block in the
enclosure. Provide a
separate neutral for
each load.
Zero cross relay B
(B) Load
(A) Load
(B) Line in (HOT)
Low-voltage control
wiring: 4-pin connector
to AMX Lighting master
controller
(A) Line in (HOT)
Fluorescent Ballast
Ballast
FIG. 1 RDM-2ZC
Load
RDM-2ZC UL and C-UL Ratings
Neutral
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120-277 VAC, 2400 W
240/277 VAC, 2400 W
Safety ground
Circuit breaker
panel
Suggested Switched Loads
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Incandescent
Electronic transformers
HID ballast
Neutral
Load
Neon lights
(cold-cathode, on/off)
Electronic and magnetic ballast
Specifications
FIG. 3 RDM-2ZC wiring configuration
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Dimensions (HW): 10.00" x 2.75" (25.40 cm x 6.99 cm)
Non-phase dependant
Use wires rated at 75°C (167°F)
Torque terminals to 7 in-lbs. (0.8 N/M)
Max. wire size: 10 AWG (4 mm²)
Wire stripping length: 0.28" (7 mm)
Weight: 2.0 lbs. (0.91 kg)
BTU/hr: 300
Control current: 45 mA per relay (90 mA total) @ 12 VDC
Caution: Pre-Installation Notes
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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.
Use low voltage wires with a 300 volt rating or greater.
Use field installed copper conductors.
All electrical ratings are for continuous duty.
For indoor use only.
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