Lightronics AT402 - Manual (Page 4)

Page 4 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
OPERATION
CIRCUIT BREAKERS
Some models of AT Series dimmers use circuit breakers. If it does - there is 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 a LED indicator for each channel on circuit board. They provide an indication of the current lighting
intensity for the associated channel.
DMX OPERATION
When a DMX Lighting Control console of controller is used with an AT series dimmer the dimmer will respond to
controller DMX channels 1 - 4. No additional settings are needed. If a valid DMX signal is provided to the unit - it
will override and lock out ALL remote switch closure operation.
REMOTE SWITCH CONTROL
GENERAL REMOTE SWITCH OPERATION - A SMALL THEATER EXAMPLE
During theater operation, the lighting is controlled by external momentary switch closures either manually or by
automated equipment. The AT-402 dimmer is designed to activate preset lighting conditions in response to these
controls.
A simple scenario is described in the following table. The table is for an installation where a four channel unit is
used. AT-402 dimmer channels 1 and 2 are connected to the stage lights and AT-402 dimmer channels 3 and 4
are connected to the house lights. The 3% intensity level shown for some of the settings in the table essentially
results in no light from the lamps but keeps the lamp filaments warm which extends the lamp life.
ACTIVITY or PRESET
HOUSE LIGHTING
Channel 1
HOUSE LIGHTING
Channel 2
STAGE LIGHTING
Channel 3
STAGE LIGHTING
Channel 4
A Opening and Seating 90% (5 sec. Fade) 90% (5 sec. Fade) 90% (5 sec. Fade) 90%(5 sec. Fade)
B Introduction 50% (15 sec. Fade) 50% (15 sec. Fade) 3% (15 sec. Fade) 3% (15 sec. Fade)
C Main Performance 3% (5 sec. fade) 3%(5 sec. fade) 3% 3%
D Closing 60% (10 sec. Fade) 60% (10 sec. fade) 3% 3%
MANUAL ALL ON / RESUME OPERATION
The "All On / Resume" control may be activated by momentary external switch closure between one of the
"Common" terminals and the "All On / Resume" terminal of the circuit board Control Terminal Strip. . This function
overrides other switched channel controls. It sets all channels to maximum intensity, and remains in effect until
the button is pushed again. At that time the unit will "Resume" normal operation (return to the intensity settings
provided by the other remote switch control signals).