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AS42D COMPACT DMX DIMMER
Version 2.2 OWNERS MANUAL 06/01/2022
www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 Tel: 757 486 3588
DESCRIPTION
The AS42D is a compact four channel dimmer. It
has a maximum capacity of 1200 Watts per channel
and maximum total load capacity of 4800 Watts. It is
supplied with two input power cords which may be
connected to two different 120 VAC power phases.
The AS42D is intended for INDOOR USE ONLY.
The unit operates using the USITT DMX-512
protocol or an industry standard three wire multiplex
protocol. The AS42D may be operated in a relay
(non-dim) mode. The unit will also function as a
chaser and has several preset chase patterns which
may be used.
INSTALLATION
LOCATION: Locate the unit vertically with control
signal connectors on bottom in a well ventilated area
away from moisture and heat. Two ½” holes are
provided on the dimmer top cover to install a lighting
bar pipe clamp and suitable safety cables.
POWER CONNECTIONS: Extending from the
chassis are two 20 amp line cords for connection to
two separate 120 VAC grounded services in any
phase combination. Total capacity of the AS42D is
4800 watts.
LOAD CONNECTIONS: There are four numbered
duplex outlets on the top of the unit. Each provides
two connections for one output channel. You can
connect up to 1200 Watts of lighting to each
channel.
STAGE PIN OUTPUT CONNECTOR OPTION:
There are four numbered female stage pin
connectors on the top of the unit. One connection is
provided for each output channel. Wiring
information for the stagepin connectors is shown on
the top of the unit.
CONTROL SIGNAL CONNECTIONS:
MULTIPLEX OPERATION: The male three pin XLR
connector on the unit end panel connects to the
control console. The female connector is for
connection to additional dimmers. The AS42D
dimmer is compatible with the Lightronics and
NSI/Sunn three wire multiplexed protocol. If you
have older Lightronics dimmers which run in the
obsolete Lightronics mode only, contact Lightronics
for information on changing the mode. When using
multiple dimmers, ALL dimmers MUST be in the
SAME mode.
DMX-512 OPERATION: The male five pin XLR
connector on the unit end panel connects to the
control console. The female connector is for
connection to additional devices. If both multiplex
and DMX signals are available to the unit - it will
automatically lock on to the DMX signal. Note that
DMX does not provide for console power via the
dimmer chain. Therefore the DMX console used with
AS42D dimmers must be powered by other means.
AS42D END VIEW
CONTROL SIGNAL WIRING:
OPERATION
NORMAL MODE (non-chaser)
A solid green LED in the end panel will indicate that
a valid control signal (DMX or multiplex) is applied to
the unit.
A DIP switch block on the end panel selects the
starting channel number of the dimmer. The seven
right hand switches control this function. For
example, if all switch positions are down - the
dimmer will respond to channels 1-4. Moving the
switch position on the far right up will set the dimmer
to respond to channels 5-8. A complete table of
channel assignments is provided in this manual.
You can address up to 512 channels using DMX
control and up to 128 channels with multiplex
control.
RELAY MODE: Pairs of channels (1/2 and/or 3/4)
may be switched into the relay mode. In this mode
the output of these channels will be either off or full
