Owner manual

Page 5 of 13
RD - 121 RACK MOUNT DIMMER
Version 1.2 OWNERS MANUAL 02/28/2005
www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 [phone]
RESETTING THE UNIT
The RD-121 may be reset to a "factory provided" configuration by holding down the MENU button on the front
panel for about 5 seconds. A message "SYSTEM RESET" will appear on the front panel LCD display. 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 to DIM (relay mode turned off).
3. The external switch sensing function is turned off.
4. The internally stored scene is turned off. (it is not erased).
5. The programmable chase pattern is turned off and erased.
6. Chase parameters are set to a default set of conditions. The Default conditions are given in the table under
the section CONTROLLING CHASER CHARACTERISTICS.
You should perform a setup procedure before using the unit. Setup includes (1) Setting the channel assignments
that the dimmer will respond to and (2) Setting individual channels to “DIM” or “NON-DIM” (relay). Once the
setup is completed the unit will retain the settings until changed by the operator (including when the unit is
powered off and restarted).
ASSIGNING DIMMER CHANNELS (CHANNEL PATCHING)
The RD-121 has 12 dimming channels labeled A-L. Each of these channels may be assigned to any console
channel number from 1 to 512. Multiple dimmer channels may be assigned to a single console fader if desired.
This gives you the ability to soft patch at the dimmer itself.
TO ASSIGN DIMMER CHANNELS:
1. Press the MENU once to enter the patch mode. The display will indicate “PTCH”.
2. Push SELECT. The left display bargraph channel (for dimmer channel A) will flash and the currently
assigned console channel will be shown on the display bottom row. Use the UP and DOWN arrow buttons to
change the console channel assignment for channel A.
3. Push SELECT to advance to the next dimmer channel. Continue to assign channels through channel L.
4. Push MENU three times to return to the normal operation mode.
TO SET CHANNELS TO DIM OR NON-DIM (RELAY):
1. Press MENU twice. The LCD display will indicate “NDIM”.
2. Push SELECT. The left display bargraph channel (for dimmer channel A) will flash. The display will show
“DMR” or “RLY” on the bottom row according to the current setting.
3. Use the UP and DOWN arrow buttons to change between dim and relay modes for that channel.
4. Push SELECT to advance to the next dimmer channel. Continue to set channels through channel L.
5. Press MENU twice to return to the normal display.
MANUAL OPERATION
Dimmer channels can be operated manually from the dimmer front panel. Press the SELECT button until the
desired channel's "bar graph" is flashing. Press the UP or DOWN arrow buttons until the desired level is reached.
Press the SELECT button to advance to other channels. To return control to your console, press the SELECT
button until you go PAST the last channel and stop. After approximately 6 seconds the dimmer will return to
console control. A channel continues to respond to console settings when operating from the front panel unless
you change the level for that channel at the dimmer front panel. Once this occurs - that channel will NOT respond
to console settings until you return to normal console control.