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 Page 7  of 11 

RD122 RACK MOUNT DIMMER 

 Version 1.4   

 

 

 

 

 

OWNER’S MANUAL

   

 

 

 

 

 

       11/23/2021 

www.lightronics.com 

Lightronics Inc. 

 

 

 

 

 

509 Central Drive, Virginia Beach, VA 23454 

 

 

 

 

       (757) 486-3588

 

inch,  fast  acting  fuses.  These  fuses  provide 
protection  for  the  internal  electronic  control  circuitry 
and the fan.  They may be replaced ONLY by fuses 
of identical type and size. 
 
Each  channel  of  the  RD122  is  protected  by  a  20 
Amp, fast acting, magnetic circuit breaker located on 
the  front  panel  of  the  unit.    If  the  total  load  for  a 
channel  is  greater  than  2400  Watts  the  channel 
circuit breaker will trip.  
 
TROUBLESHOOTING 
 

VERIFY  ALL  POWER  IS  REMOVED  FROM  THE 
DIMMER BEFORE HANDLING THE UNIT.

 

 
1. 

To  simplify  troubleshooting  -  reset  the  unit  to 

 

provide a known set of conditions. 

2. 

Check the console is powered and the  console 
channels are correctly patched or set. 

3. 

Check  the  control  cable  between  the  dimmer 

 

and console. 

4. 

Verify the loads and their connections. 

 
 
 
 
 
 
 
 
 
 
 

OWNER MAINTENANCE 
 
There are no user serviceable parts inside the unit.  
The  best  way  to  prolong  the  life  of  your  unit  is  to 
keep  is  cool,  clean,  and  dry.    It  is  important  the 
cooling  intake  and  exit  vent  holes  are  clean  and 
unobstructed. 
 
Service  by  other  than  Lightronics  authorized  agents 
may void your warranty. 
 
OPERATING AND MAINTENANCE ASSISTANCE

 

 
If  service  is  required,  contact  the  dealer  from  whom 
you purchased the equipment or contact Lightronics, 
Service  Department,  509  Central  Drive,  Virginia 
Beach,  VA  23454        TEL  757  486  3588.  All  items 
returned for service must include a description of the 
problem along  with  your name, address, and phone 
number. 
 
Lightronics  recommends  that  you  record  the  serial 
number of your unit for future reference. 
 

SERIAL NUMBER 

______________________ 

 

WARRANTY INFORMATION AND 
REGISTRATION – CLICK LINK BELOW 

 

www.lightronics.com/warranty.html 

 

 

 

 

Summary of Contents for RD-122

Page 1: ...www lightronics com Lightronics Inc 509 Central Drive Virginia Beach VA 23454 757 486 3588 RD122 RACK MOUNT DIMMER OWNER S MANUAL VERSION 1 4 11 23 2021...

Page 2: ...ough slots on the side and exits through holes in the bottom of the face plate Make certain these ventilation holes are not obstructed Do not place the RD122 where it will be exposed to moisture or ex...

Page 3: ...play Release the MENU button when you see the message Resetting the unit causes the following actions 1 Channel patch is set to 1 to 1 2 All channels are set to DMR relay mode turned off 3 The externa...

Page 4: ...er there is a control signal present and one or more faders are at full on The fan will drop to half speed a few minutes after all faders are lowered to full off and will stop shortly after the contro...

Page 5: ...sequence backwards ACTIVATING A CHASE PATTERN A chase stored in the RD122 is activated by connecting together Switch Input and Switch Common Pin 6 and 7 of the 7 pin Phoenix connector or pins 5 and 9...

Page 6: ...nsity of the whole chase pattern may be set using the menu system 2 Press and hold the front panel SELECT button until the front panel display appears as shown below You will have to hold the button d...

Page 7: ...are correctly patched or set 3 Check the control cable between the dimmer and console 4 Verify the loads and their connections OWNER MAINTENANCE There are no user serviceable parts inside the unit The...

Page 8: ...el to Flashing Dimmer Channel SELECT Advance to Next Channel Set Flashing Channel to Relay Dimmer Mode RLY Relay Mode DMR Dimmer Mode SELECT Advance to Next Channel Set Remote Switch Function Not Used...

Page 9: ...Page 9 of 11 RD122 RACK MOUNT DIMMER Version 1 4 OWNER S MANUAL 11 23 2021 www lightronics com Lightronics Inc 509 Central Drive Virginia Beach VA 23454 757 486 3588 REAR PANEL CONNECTION OPTIONS...

Page 10: ...T DIMMER Version 1 4 OWNER S MANUAL 11 23 2021 www lightronics com Lightronics Inc 509 Central Drive Virginia Beach VA 23454 757 486 3588 CONTROL SIGNAL CONNECTIONS FOR LMX PROTOCOL CONTROL SIGNAL CON...

Page 11: ...SIGNAL CONNECTORS USED ON THE RD122 PIN 3 PIN LMX 3 PIN DMX 5 PIN DMX 7 PIN PHOENIX 9 PIN DB9 1 LMX COMMON DMX COMMON DMX COMMON DMX COMMON LMX COMMON 2 LMX POWER DMX DATA DMX DATA DMX DATA LMX POWER...

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