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AS42L COMPACT DIMMER
Revision 2.0 OWNERS MANUAL 10/08/2021
www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 Tel: 757 486 3588
DESCRIPTION
The AS42L is a compact 4 channel light dimmer. It
has a maximum capacity of 1200 Watts per channel
and a maximum total load capacity of 4800 Watts. It
is supplied with 2 input power cord stubs which may
be connected to 2 different 120 VAC power services.
The AS42L is intended for INDOOR USE ONLY.
The unit operates using the Lightronics LMX-128
multiplex protocol. The AS42L 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.
AS42L END VIEW
INSTALLATION
LOCATION: Locate the unit vertically with control
signal connectors on the 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
2 separate 120 VAC, 20 Amp grounded services.
Total capacity of the AS42L is 4800 Watts.
LOAD CONNECTIONS: There are 4 numbered
duplex outlets on the top of the unit. Each provides
2 connections for each of the output channels. You
can connect up to 1200 Watts of lighting to each
channel.
CONTROL SIGNAL CONNECTIONS:
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 AS42L dimmer is compatible with the
Lightronics LMX-128 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.
CONTROL SIGNAL WIRING:
Console Power
(+15Volts DC)
Applies to input and output connector
OPERATION
NORMAL MODE (Non-Chaser):
A green LED in the end panel will indicate that a
valid LMX-128 control signal is applied to the unit. A
DIP switch block on the end panel selects the
starting channel number of the dimmer. The 7 right
hand switches control this function. For example, if
all switch positions are down - the dimmer will
respond to channels 1-4. Raising the switch on the
far right 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 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 on depending on the
control console channel setting. The trip point for
turn on is aprox. 50%. The 2 left hand switches on
the DIP switch block control relay mode channel
selection. The UP position of the switches invokes
RELAY MODE.
CHASER MODE:
When operating in the chaser mode the AS42L
becomes independent of the control console and
other dimmers. The green LED indicator is OUT
when in the chaser mode. Chaser mode is turned
on and off by one of the DIP switches on the end of
the unit. A diagram on the unit cover shows the
switch settings for controlling chaser operation.
Eight different chase patterns are available. A
"bounce" condition may be imposed on several of
the chase patterns by setting one of the DIP
