Installation Sheet
RDM-3FDB Triple Channel Lutron FDB Ballast Dimmer
1900 W
The RDM-3FDB Triple Channel Ballast Dimmer is a 1920 W positive air gap
relay and dimmer, built for strength and for reliable switching/dimming of
Lutron FDB ballasts. It is designed for use with the RDA series of enclo-
sures, in an AMX Lighting™ modular digital dimming system. The RDM-
3FDB module's 120, 240, and 277 VAC ratings are CE, UL, and C-UL
approved.
•
This module may require extra power from the AXlink connection or an
external power supply connected to the control card.
Connecting the RDM-3FDB to the AMX Lighting Master
Pin 3 (RLY)
Pin 2 (DIM)
Pin 1 (+12 V)
Mounting
points
RDM-3FDB 4-pin module connector
3 (-)
Relay
2 (AC)
Line in (hot)
Ballast A
1 (+)
Switched out
Dimmed out
4-pin plug from RDM series module
Note: The 4-pin plugs from the module connector
Relay
to the 4-pin connector on the master (black plug cover facing up).
Line in (hot)
Ballast B
Switched out
Dimmed out
FIG. 2 RDM-3FDB connections
Lighting Application Drawing
Relay
All neutrals are
common to the
Neutral block in the
enclosure. Provide a
separate neutral for
Line in (hot)
Ballast C
Switched out
Dimmed out
Neutral
Neutral
each load.
Fuse
Positive air
gap relay
Switched
Dimmed
Line in (HOT)
Ballast
Florescent
Ballast
Low-voltage control wiring:
4-pin connector to AMX
Lighting master controller
Circuit breaker
panel
The fuses protect the dimming
circuit from a low impedance
load.
•
The fuse would blow if it
were incorrectly wired
Catastrophic ballast failure
Reversing switched and
dimmed circuits
FIG. 1 RDM-3FDB
•
•
RDM-3FDB UL and C-UL Ratings
•
Reversing dimmed and
line circuits.
•
•
120 VAC, 1920 W
240/277 VAC, 1920 W
The dimmed output must be
connected to a high impedance
load.
Suggested Dimmed Loads
•
•
•
Most 3-wire dimmable fluorescent ballasts
©
®
FIG. 3 RDM-3FDB wiring configuration
Lutron Hi-Lume FDB Ballasts
®
Lutron Eco-10 Dimmable Ballasts
Specifications
•
•
•
•
•
•
•
•
•
•
Dimensions (HW): 10.0" x 2.75" (25.4 cm x 6.99 cm)
Dimmed output protected by a 250 mA GMA 5 x 20 mm fuse
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)
Weight: 1.57 lbs. (0.712 kg)
BTU/hr: 5
Control current: 85 mA @ 12 VDC
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.
Use field installed copper conductors.
All electrical ratings are for continuous duty.
For indoor use only.
|