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.
RDM-HDC UL and C-UL Ratings
• 120 VAC, 50/60 Hz, 2400 W
• 240/277 VAC, 50/60 Hz, 2400 W
• Control Out: 50 mA, 12 VDC
sourcing/sinking
Suggested Dimmed Loads
• Four-wire dimmable ballasts
• All low-voltage DC controlled ballasts
Specifications
• 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
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.
• 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.
• 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
Lighting Application Drawings
Warning: Failure to ground the ballast may cause ballast
failure
FIG. 1 RDM-HDC
Low-voltage control
wiring: 4-pin
Relay
+ out (LV)
- out (LV)
Neutral
Line in
Load
High
Low-voltage
voltage
connector to AMX
Lighting master
controller
Mounting
points
FIG. 2 Connecting the RDM-HDC and AMX Lighting Master
FIG. 3 RDM-HDC application wiring
Pin 4 (GND)
Pin 3 (RLY)
Pin 2 (DIM)
Pin 1 (+12 V)
RDM-HDC 4-pin module connector
1 (+)
2 (DIM)
3 (-)
GND
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).
RDM-HDC
LOAD LINE NEUT CON
Ballast
Florescent Ballast
Neutral
Line in (HOT)
Load
Neutral
+
-
Low-voltage wire rated
to 300 V
Circuit breaker
panel
