Installation Sheet
RDM-MDM Multimode Dimmer Module
2400 W
The RDM-MDM Multimode Dimmer Module is ideally used in situations
where the load is not specified or the load may change at the last moment.
This unit is a unique combination 2400 W Incandescent dimmer,
2400 W Switch, or 2400 W FDB fluorescent dimmer. It consists of a heavy
duty SSR construction for dimming and a heavy duty positive air gap relay
for switching. The RDM-MDM module's 120 and 240-277 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.
Test loads for shorts before connecting.
Use low-voltage wires with a 300 volt rating or greater.
Use field-installed copper conductors.
Run all low-voltage and control wires away from heat producing parts
of the dimmer.
Mounting points
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Each dimming circuit must have a separate neutral connection.
All electrical ratings are for continuous duty.
For indoor use only.
AC lighting loads only.
This module may require extra power from the AXlink connection or an
external power supply connected to the control card.
Neutral
Line
High-voltage
connections
Dimmed
Switched
Connecting RDM Series Modules to the RDM-MDM:
Pin 4 (GND)
Pin 3 (RLY)
350 µS Choke
Pin 2 (DIM)
Pin 1 (+12 V)
RDM-MDM four-pin module connector
Mechanical Relay
4-pin plug from a 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).
2400 W power device
FIG. 2 Connecting RDM series modules to the RDM-MDM
Low-voltage control
wiring: four-pin connector
to AMX Lighting master
controller
FIG. 1 RDM-MDM
RDM-MDM UL and C-UL Ratings:
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120 VAC, 50/60 Hz, 2400 W per circuit
240/277 VAC, 50/60 Hz, 2400 W per circuit
Specifications:
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Dimensions (HW): 10.00" x 2.75" (25.40 cm x 6.99 cm)
Phase dependant dimming
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: 4.5 lbs (2.04 kg)
BTU/hr: 300
Control current: 190 mA @ 12 VDC
Suggested Loads:
• Incandescent
• Two-wire, phase-controlled ballast
• Three-wire, phase-controlled ballast
• Switched fluorescent ballast
• Low-voltage
• Neon, cold-cathode
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