Installation Sheet
RDM-HDC Heavy Duty DC Module
2400 W, 0-12 VDC
The RDM-HDC Heavy Duty DC Module is a heavy-duty 2400 W module for
dimming of fluorescent ballast loads. It uses a 0 to 12 VDC current sinking
or sourcing for use with all four-wire ballasts. 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.
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.
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.
Test loads for shorts before connecting.
Mounting
points
This module may require extra power from the AXlink connection or an
external power supply connected to the control card.
Connecting the RDM-HDC to the AMX Lighting Master
Pin 4 (GND)
Neutral
High
Pin 3 (RLY)
Pin 2 (DIM)
voltage
Line in
Pin 1 (+12 V)
- out (LV)
+ out (LV)
Load
Low-voltage
RDM-HDC 4-pin module connector
GND
3 (-)
2 (DIM)
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).
Relay
FIG. 2 Connecting the RDM-HDC and AMX Lighting Master
Lighting Application Drawings
Florescent Ballast
-
Neutral
Line in (HOT)
Ballast
+
Low-voltage control
wiring: 4-pin
connector to AMX
Lighting master
controller
Load
Neutral
RDM-HDC
LOAD LINE NEUT
CON
Low-voltage wire rated
to 300 V
FIG. 1 RDM-HDC
Circuit breaker
panel
RDM-HDC UL and C-UL Ratings
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120 VAC, 50/60 Hz, 2400 W
240/277 VAC, 50/60 Hz, 2400 W
Control Out: 50 mA, 12 VDC
sourcing/sinking
FIG. 3 RDM-HDC application wiring
Warning: Failure to ground the ballast may cause ballast
failure
Suggested Dimmed Loads
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Four-wire dimmable ballasts
All low-voltage DC controlled ballasts
Specifications
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Dimensions (HW): 10" x 2.75" (25.4 cm x 6.99 cm)
Non-phase dependant
Use wires rated at 75°C (167°F)
Torque terminals to 20 in-lbs. (2.3 N/M)
Max. wire size: 10 AWG (4 mm²)
Wire stripping length: 0.28" (7 mm)
Weight: 1.3 lbs. (0.590 kg)
BTU/hr: 150
Control current: 150 mA @ 12 VDC
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