Lightronics RE121D-XT User Manual

Rack Mounted Dimmers

• 12 Channels

• 1200 Watts per Channel

• 6 Output Connection Options

• DMX-512 OR LMX-128 Control

• UL-508 Compliant

Available in DMX-512 or LMX-128 (3 pin multiplex), the RE-121D and the RE-121L answer the need
for quality and reliability in a basic dimmer. High reliability 40 Amp triacs on each channel carry their

10Amploadwithplentyofpowertospare.Efcientfancoolingkeepsthetemperaturelowandthe

reliability high. Individual channel switches allow for fast and convenient lamp testing and focus. LED
indicators display individual channel levels, signal presence, and input power status. A DIP switch
allows for easily setting the starting channel number, moving in blocks of four. Front panel mounted
electronics allow fast and easy replacement should the need ever arise. Relay mode may be activated
in blocks of 6 channels on the RE-121D version. Both versions may (optionally) be ordered with 10
Amp fast acting magnetic circuit breakers replacing the channel fuses.

CHANNEL OUTPUT CONNECTIONS OPTIONS

Duplex outlet panel with 1 connection per channel
External terminal strip (includes knockout cover)

Stagepin panel with 1 connection per channel
Patchbay panel with 2 powerlock connections per channel
Socapex connector panel (wiring per customer selection)

Rack Mount Dimmer

RE-121D / RE-121L

SPECIFICATIONS

Channels/Capacity: 12 @ 1200 Watts each

Power Input: 2 HOTS of 120VAC Single/Three
Phase 60 Amps per Hot Input
Under Full Load

Power Connection: Terminal Block

Overload Protection: 10 Amp Fast Acting Circuit
Breakers

System Addressability: 512/128 Channels
(DMX/LMX)

Cooling: Internal Fan Cooled Heatsink

Filtering: 350 Microseconds Minimum
Rise Time

Minimum Load: 15 Watts

509 Central Dr., Virginia Beach, VA 23454. Tel: [phone].
Fax: [phone]. Visit us online at www.lightronics.com. 101213smh

Control Sources: DMX-512 (RE-121D)
LMX-128 (RE-121L)

Temperature Rise: 34 Degrees F at Full Load

Response Time: 8.33 Milliseconds

Efciency:  97%

Size: 19”W x 3.5”H x 13”D

Weight: 26 Pounds

Architect & Engineer’s Specications

EXTERNAL TERMINAL STRIP PANEL (includes knockout cover)

CONTROL IN

CONTROL OUT

CHANNEL OUTPUT

CONNECTIONS

NEUTRALS

GROUND

1 2

3

4

5

6 7 8

9 10

11 12

INPUT
POWER
ACCESS

STAGE PIN PANEL

CONTROL IN

CONTROL OUT

1 2

3

4

5 6

7

8 9 10

11 12

CHANNEL OUTPUT CONNECTIONS

INPUT
POWER
ACCESS

DUPLEX OUTLET PANEL

CONTROL IN

CONTROL OUT

CHANNEL OUTPUT CONNECTIONS

1 2

3

4

5

6

7

8 9 10

11

12

INPUT

POWER
ACCESS

PATCH BAY PANEL

CONTROL IN

CONTROL OUT

NEUTRALS

1

2

3

4

5 6

7

8

9

10 11

12

GROUND

CHANNEL OUTPUT TERMINALS

INPUT
POWER

ACCESS

SOCAPEX CONNECTOR PANEL

CONTROL IN

CONTROL OUT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

OUTPUT CHANNELS CONNECTORS (19 pin)

INPUT

POWER

ACCESS

The dimming system shall have 12
circuits with a load capacity of 1200 Watts
per circuit. Each circuit is protected by
a 10 Amp fast acting magnetic circuit
breaker or a 10 Amp fuse. 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 front panel dip
switches. A user may program the system
setup, dimmer attributes of Dim or Relay.
LED indicators display individual channel
levels, signal presence, and input power
status. The dimming system uses the
USITT standard DMX-512 protocol in the
“D” version and LMX-128 protocol in the
“L” version for direct control of the
dimming circuits.

The 5 year warranty is valid if the Warranty Registration

card is returned to Light ronics, Inc. within 30 DAYS of

5 YE AR W ARR AN TY

the purchase date.

Power requirements of the dimming
system shall be 2 hots of 120VAC
Single/Three phase service. Capacity shall
be 60 Amps per leg. DMX-512 is
connected through a standard 5 pin XLR
connector. LMX-128 is connected through
a standard 3 pin XLR connector. A variety
of electrical output connections are
available including Stage Pin, Socapex,
Patch Bay (Powerlock), Duplex (Edison)
and External Terminal Strip. Mounting of
the dimming system shall be on standard
19” EIA rack mount. Dimensions are

3.5”H x 19”W x 13”D and the weight shall
be 28 lbs. The Dimming System is covered
by a 5 year factory warranty.

The dimming system shall be a
Lightronics RE-121.

509 Central Dr., Virginia Beach, VA 23454. Tel: [phone].
Fax: [phone]. Visit us online at www.lightronics.com. 101213smh