AMX Heavy Duty FDB Module RDM-HFDB Installation Sheet

The RDM-HFDB Heavy Duty FDB Module is a heavy-duty, 2400 W positive
air gap relay and dimmer, built for strength and for reliable switching/dim-
ming of Lutron FDB ballasts. It is designed for use with the RDA series of
enclosures, in a AMX Lighting™ modular digital dimming system. The
RDM-HFDB module's 120, 240, and 277 VAC ratings are CE, UL, and C-UL
approved.
Mounting points
High
Neutral
voltage
Line in (hot)
connections
Positive air
gap relay
FIG. 1 RDM-HFDB

RDM-HFDB UL and C-UL Ratings

• 120 VAC, 2400 W
• 240/277 VAC, 2400 W

Suggested Dimmed Loads

©
• Lutron FDB Ballasts
®
• Lutron ECO-10 Ballasts (refer to the AMX Lighting instruction manual
for more information)

Specifications:

• Dimensions (HW): 10.0" x 2.75" (25.4 cm x 6.99 cm)
• 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: 1.50 lbs. (0.680 kg)
• BTU/hr: 150
• Control current: 135 mA @ 12 VDC
• Use Dimming Curve 6 (refer to the Programming AMX Lighting
instruction manual for more information).
• For use with FDB ballasts.
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.
• 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.
• This module may require extra power from the AXlink connection or an

Connecting the RDM-HFDB to the AMX Lighting Master

High
Switched out
voltage
Dimmed out
connections
FIG. 2 Connecting the RDM-HFDB and AMX Lighting Master
Solid state relay
Low-voltage control
wiring: 4-pin connector
to AMX Lighting master
controller
Circuit breaker
panel
FIG. 3 RDM-HDC application wiring
Installation Sheet
RDM-HFDB Heavy Duty FDB Module
external power supply connected to the control card.
Pin 3 (RLY)
Pin 2 (DIM)
Pin 1 (+12 V)
RDM-HFDB 4-pin module connector
3 (-)
2 (AC)
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).

Lighting Application Drawings

Line in (HOT)
Neutral
RDM-HFDB
NEUTRAL LINE SWITCHED DIMMED
2400 W
All neutrals are common
to the Neutral block in
the enclosure. Provide
a separate neutral for each
Neutral
load.
Florescent Ballast
Ballast
Switched
Dimmed