Rack Mount Dimmer
• 12 Channels
• 2400W per Channel
Rack Mount Dimmer
RD122
• LMX-128 & DMX-512
• Fast Acting Magnetic Circuit Breakers
• Dim/Non-Dim Mode by Channel
• 8 Chases
• Softpatch
• 120/240V 120 Amp
The RD122 is a 28,800 Watt, 12 channel, rack mount lighting dimmer. It is suitable for church, stage, theater, school, night club,
live performances and other event and artistic applications. Each of the channels has a capacity of 2400 Watts. It is controlled
via low voltage signals which may be LMX-128 (3 wire multiplex), or USITT DMX- 512. The unit is fan cooled. Channels may
be independently assigned from the unit. The unit is over temperature and over voltage protected and has a magnetic circuit
breaker for each channel. The RD122 has several stand alone functions which enable it to operate without a control console.
These functions include a storable scene which may be activated by an external switch closure, a programmable chaser, and 7
factory set chase patterns.
Control Output Connection Options: Duplex outlet panel with 1 connection per channel, External terminal strip (includes
knockout cover), Patchbay panel with 2 powerlock connections per channel, Socapex connector panel (wiring per customer
selection)
SPECIFICATIONS
Channels/Capacity: 12 @ 2400 Watts each
Power Input: 2 HOTS of 120VAC Single/Three
Phase 120 Amps per Hot Input
Under Full Load
Overload Protection: 20 Amp Fast Acting Circuit
Breakers
System Addressability: Softpatch any dimmer channel
to any control channel
Cooling: Variable speed fan with auto
shutdown
Filtering: 450 Microseconds Minimum
Rise Time
Relay Mode: Each individual channel may be
set for relay mode
Minimum Load: 15 Watts
Display: Dimmer Levels, Scene/Chase/Control
Signal Status and Setup Menus
Control Sources: DMX-512, LMX-128
Local Control: Dimmers may be adjusted without
a console
Internal Scene: Level memory with 2 second fade
rate, pile-on mode
Remote Switch: Scene ON/OFF, Chase ON/OFF, or
Not Used
Chase Patterns: 7 Preset, 1 User Programmable
Chase Steps: 32 Maximum
Step Rates: 1/4 Second Increments, 1/4 Second
to 16 1/2 Minutes
Size: 19”W x 3.5”H x 17”D
Weight: 43 Pounds
509 Central Dr STE 101, Virginia Beach, VA 23454 Tel: 757-486-3588 / 800-472-8541
Fax: 757-486-3391 Visit us online at www.lightronics.com (131017)
LMX IN
Rack Mount Dimmer
3
8 9 10
CHANNEL OUTPUT CONNECTIONS
5
6 7 8
4
CHANNEL OUTPUT
CONNECTIONS
12
1
11
13
18
10
19
17
9
16
15
8
7
6
CHANNEL OUTPUT CONNECTIONS
4
9 10
11 12
3
4
DMX AND
OTHER CONTROLS
LMX IN
DMX AND
OTHER CONTROLS
LMX IN
DMX AND
OTHER CONTROLS
LMX IN
DMX AND
OTHER CONTROLS
1 2
7
3
1 2
2
3
14
4
5
OUTPUT CHANNELS CONNECTORS (19 pin)
1 2 3 4 5 6 7 8 9 10 11 12
Architect & Engineer’s Specications
INPUT
POWER
5
6
ACCESS
The dimming system shall have 12 circuits with
a load capacity of 2400 Watts per circuit. Each
circuit is protected by a 20 Amp fast acting
11
12
magnetic circuit breaker. An allowance of 200%
overhead capacity is employed in the circuit
design. The dimming system shall have a rise
time of not less than 350 microseconds.
Programming setup and memory attributes is via
INPUT
POWER
ACCESS
a front panel LCD display with keypad controls.
A user may program the system setup, dimmer
attributes of Dim or Relay, Softpatch, a single
scene memory and a chase via the front panel
display and keypad controls. There are seven
preset chases and one user programmable
NEUTRALS
GROUNDS
chase, a maximum of 32 steps are available in
the chase, chase steps are programmable in 1/4
Sec. increments, 1/4 sec to 16 1/2 Minutes in
12
1
2
11
13
18
10
19
14
17
9
16
15
5
8
7
6
INPUT
POWER
ACCESS
length. The single scene and chase on/off are
recalled via contact closure. The dimming system uses the USITT standard DMX-512 protocol
and LMX-128 protocol for direct control of the
dimming circuits.
Power requirements of the dimming system shall
be 2 hots of 120VAC Single/Three phase service.
Capacity shall be 120 Amps per leg. DMX-512
INPUT
POWER
ACCESS
and contact closure are connected through a
standard DB9 connector, a ribbon connector is
used to pass data to subsequent RD series
dimmers. A variety of electrical output
connections are available including Edison,
Socapex, conduit knockout, terminal
NEUTRALS
GROUND
connector, Stagepin, and Hot-Patch bay.
Mounting of the dimming system shall be on
standard 19” EIA rack mount.
Dimensions are 3.5”H x 19”W x 17”D and the
weight shall be 43 lbs.
The dimming system shall be a
Lightronics RD122.
To view and/or download the Owner’s Manual
click here: www.lightronics.com/manuals/
rd122m.pdf
509 Central Dr STE 101, Virginia Beach, VA 23454 Tel: 757-486-3588 / 800-472-8541
Fax: 757-486-3391 Visit us online at www.lightronics.com (131017)
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