AMX RDM-3DC User Manual
Installation Sheet
RDM-3DC Triple DC Dimmer Module
1920 W, 0-10 VDC (x3)
The RDM-3DC Triple DC Module is a 1920 W module used for the dimming
of fluorescent ballast loads. It uses a 0 to 10 VDC current sinking for use
with 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 and 277 VAC ratings are CE, UL, and C-UL approved.
Mounting
points
Relay
Relay
High
voltage
High
voltage
Line in
Load
out
Relay
Line in
Load
out
- out (LV)
+ out (LV)
Load out
Line in
+ out (LV)
- out (LV)
+ out (LV)
- out (LV)
Fuses
Low-voltage
High
voltage
Low
voltage
Low
voltage
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-3DC to the AMX Lighting Master
Pin 4 (GND)
Pin 3 (RLY)
Pin 2 (DIM)
Pin 1 (+12 V)
RDM-3DC 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).
Low-voltage control
wiring: 4-pin
connector to AMX
Lighting master
controller
FIG. 1 RDM-3DC
RDM-3DC UL and C-UL Ratings
• 120 VAC, 50/60 Hz, 1920 W
• 277 VAC, 50/60 Hz, 1920 W
• Control Out: 50 mA, 12 VDC sinking
Suggested Dimmed Loads
• Four-wire dimmable ballasts, like Advance Transformer Mark VII™ or
the Energy Savings SuperDim™ series
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: 2.9 lbs. (1.315 kg)
• BTU/hr: 150
• Control current: 125 mA @ 12 VDC
FIG. 2 Connecting the RDM-3DC and AMX Lighting Master
Lighting Application Drawings
Neutral
Line in (HOT)
Circuit breaker
panel
FIG. 3 RDM-3DC application wiring
Neutral
Ballast
+
Load
The fuses protect the dimming
circuit from a low impedance load.
• The fuse will blow if it were
incorrectly wired
• Catastrophic ballast failure
• Reversing switched and
dimmed circuits
• Reversing dimmed and
line circuits.
The dimmed output must be
connected to a high impedance
load.
Florescent
Ballast
Warning: Failure to ground the ballast may cause ballast failure
AMX Corporation reserves the right to alter specifications without notice at any time.
For full warranty information, refer to the AMX Instruction Manual(s) associated with your Product(s).
The AMX logo is a trademark of AMX Corporation. AMX Corporation reserves the right to alter specifications without notice at any time.
3000 research drive, richardson, TX 75082 USA • 469.624.8000 • 800.222.0193 • fax 469.624.7153 • technical support 800.932.6993
043-019-2546 12/03 ©2003 AMX Corporation. All rights reserved.
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