Installation Sheet
RDM-ZC Zero Cross Module
2400 W
The RDM-ZC Zero Cross Module is a 2400 W zero-cross relay built for long
term, reliable switching of electronic fluorescent ballasts, electronic trans-
formers and incandescent lamps. It is designed for use with the RDA series
of enclosures, in an AMX Lighting™ modular digital dimming system. The
RDM-ZC 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-ZC to the AMX Lighting Master
Pin 4 (GND)
Pin 3 (RLY)
Pin 2 (DIM)
Mounting points
Pin 1 (+12 V)
RDM-ZC 4-pin module connector
High-voltage
connections
Line in (hot)
Load out
3 (-)
1 (+)
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).
FIG. 2 RDM-ZC connections
Lighting Application Drawing
All neutrals are common
to the Neutral block in the
enclosure. Provide a
separate neutral for
each load.
Neutral
Zone 1
Zero cross
relay
Load
Line in (HOT)
Incandescent track
lighting
Low-voltage control
wiring: 4-pin connector
to AMX Lighting master
controller
FIG. 1 RDM-ZC
Fluorescent Ballast
BALLAST
RDM-ZC UL and C-UL Ratings
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120-277 VAC, 50/60 Hz, 2400 W
240/277 VAC, 50/60 Hz, 2400 W
Circuit breaker
panel
Neutral
Load
Suggested Switched Loads
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Incandescent
Electronic transformers
HID ballast
Neutral
Load
Neon lights
(cold-cathode, on/off)
Electronic and magnetic ballast
FIG. 3 RDM-ZC wiring configuration
Specifications
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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: 1.5 lbs. (0.68 kg)
BTU/hr: 150
Control current: 45 mA @ 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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