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AT SERIES ARCHITECTURAL DIMMER
Revision 0.3
OWNERS MANUAL
03/16/2020
www.lightronics.com
Lightronics Inc.
509 Central Drive Virginia Beach, VA 23454
Tel 757 486 3588
SET UP FOR A SINGLE PHASE POWER INSTALLATION
Press the
NEXT
button repeatedly until
P2
appears on the LED indicator. This tells the unit which phase circuit 2 is
getting its power from, hence P2 (phase - Channel 2). Use the
UP/DOWN
buttons to set the right hand indicator to
"A". Do the same for P3 and P4 (phase - Channel 3) (phase - Channel 4).
SET UP FOR A THREE PHASE POWER INSTALLATION
Hold down the
NEXT
button until
P2
appears on the LED indicator. Use the
UP/DOWN
buttons to set the right hand
indicator to "B" or "C". If the unit does not fade smoothly between preset levels or some of the channels seem to
operate in an OFF/ON only fashion then you should change this setting to the other three phase choice (B or C).
OPERATION
CIRCUIT BREAKERS
AT Series dimmers use a 20 Amp magnetic circuit breaker for each dimmer channel located on the right side of the
unit. To operate a channel, the associated circuit breaker must be closed. Channel numbers for the circuit breakers
are labeled on the unit. If a circuit breaker will not remain closed then there is an overload at the lamps for that
channel, which MUST be corrected before operation can continue.
INDICATORS
There is an LED indicator for each channel on the circuit board. They provide an indication of the current lighting
intensity for the associated channel.
DIMMER CURVE
Dimmer curves can be set independently for each of the available dimmers in an AT series unit. LL= LED (Lutron
LED or IN=Incandescent). To set the dimmer curve, press next until you see c1. Use the up/down buttons to select
LL or IN. Repeat on C2-C4 for each channel.
DMX OPERATION
The DMX channels are set by selecting the start address. The address is set on two separate menus
dH
for the
hundreds position (0-5, 0 being for any number lower than 100) and
dL
for the ten’s and one’s position (0-99). To
set the DMX address press the
NEXT
button until
dH
appears on the LED DISPLAY. Set the
dH
value to the first
digit of the 3 digit address using the
UP/DOWN
buttons. Then press the
NEXT
button again or until you see
dL
.
Set the dL value to the last two digits of the DMX address using the
UP/DOWN
buttons.
Loss of DMX:
If there is a loss of DMX control signal during operation, the AT-402 will revert back to the last active
Preset until DMX operation returns.
EXAMPLE: Start address of DMX 509 dH=05 dL=09
