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2408 CD / CR DIMMER SYSTEM
Software Revision 2.0, Version C
JUMPER SETTINGS
NON-VOLATILE MEMORY
The version C control card now contains an EEPROM device to store lighting levels for
automatic full restoration after a power fail.
When the installer enables this feature, the dimmer will save the current lighting levels in non-
volatile memory 10 minutes after there has been a change in lighting levels. This is an important
feature in house and architectural lighting systems, where it is important for the lighting to be
fully restored after a power blackout. Dip Switch 8 may be left on in lieu of the memory jumper
for restoration to a fixed level of 50% instead.
In theatrical stage lighting systems, this feature may not be desirable, since the dimming system
is turned off frequently.
SOFTSTART
The 2408 CD comes from the factory configured in the "SOFTSTART" operating mode. This
mode of operation forces at least a 1/10th second delay between the output being full off to the
output being full on to allow a more gradual warming of the lamp filaments. Thermal shock and
inrush currents are reduced thereby increasing lamp life and preventing nuisance tripping of the
circuit breakers.
To disable SOFTST ART; remove the jumper block from the pins marked 112 on the firing
cards. Each firing card affects only it's respective four channels. Replacing the jumper block will
restore SOFTSTART.
NOTE: The 2408 CR and any channels of the 2408 CD configured for NON DIM operation will
not be affected by soft start.
For house lighting and architectural systems:
Make sure the jumper block on each control card is installed across both jumper pins marked
SPCL on the. It is also a good idea to make sure the jumper is installed across both jumper pins
marked SOFT -START (CD's only).
For Stage Lighting Systems:
Make sure the jumper block on each control card is NOT across both jumper pins marked SPCL.
You must also remove the SOFT-START jumper on each control card so the lights will not
appear sluggish in response.
NON DIM CHANNELS
Any of the channels of the 2408 CD can be configured as NON DIM channels. This will cause
the output of the channel to go to full on whenever the input signal is over 10. When to input
signal drops to less than 100C; the channel output goes to full off. This is the equivalent of a
zero-crossing solid state relay.
To configure a channel for NON DIM operation simply remove the jumper block from the pins
on the firing card as indicated. Replacing the jumper block will restore dimming operation.
JUMPER SETTINGS
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