Lightronics AT402 - Manual (Page 3)

Page 3 of 8
AT SERIES ARCHITECTURAL DIMMER
Revision 0.1 OWNERS MANUAL 08/29/2003
www.lightronics.com
Lightronics Inc. 509 Central Drive Virginia Beach, VA 23454 tel 757 486 3588
INITIAL SET UP
Set up of the AT Series dimmer is done using the 2 LED indicators and the 3 push buttons located at the bottom
left of the low voltage section of the the circuit board inside of the unit. Use these controls to set the unit to
operate correctly for the type of input power being used for the unit.
Set the Input Power Phase for each dimmer channel. This must be set correctly or dimmers will not operate
correctly.
LED SYMBOL FUNCTION VALUE
P2 Channel 2 Input power phase A, B, or C
P3 Channel 3 Input power phase A, B, or C
P4 Channel 4 Input power phase A, B, or C
For P2-P4, set to A, B, or C depending on which phase each channel gets its power from. For single phase
power set P2, P3, and P4 to "A".
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 it's 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).
REMOTE SWITCH CONNECTIONS EXAMPLE
CH 1, PRESET A
CH 1, PRESET B
AT-402 CONTROL
TERMINAL STRIP
EXTERNAL SWITCHES
CH 1, PRESET C
CH 1, PRESET D
CH 2, PRESET A
CH 2, PRESET B
CH 2, PRESET C
CH 2, PRESET D
CH 3, PRESET A
CH 3, PRESET B
CH 3, PRESET C
CH 3, PRESET D
CH 4, PRESET A
CH 4, PRESET B
CH 4, PRESET C
CH 4, PRESET D
COMMON
COMMON
COMMON
ALL ON / RESUME