Lightronics AS42L User manual

www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 Tel: [phone]
AS42L
4 X 1200W COMPACT DIMMER
OWNERS MANUAL
Version 2.2
06/01/2022

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AS42L COMPACT DIMMER
Revision 2.2 OWNER’S MANUAL 06/01/2022
www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 Tel: [phone]
DESCRIPTION
The AS42L is a compact four 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 two input power cord stubs
which may be connected to two 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
two separate 120 VAC, 20 Amp grounded services.
Total capacity of the AS42L is 4800 Watts.
LOAD CONNECTIONS: There are four numbered
duplex outlets on the top of the unit. Each provides
two 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:
XLR Connector Pin #
Signal Name
1
LMX Common
2
Console Power
(+15Volts DC)
3
Multiplex Signal
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 seven
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 two 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

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AS42L COMPACT DIMMER
Revision 2.2 OWNER’S MANUAL 06/01/2022
www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 Tel: [phone]
switches. The bounce condition causes the chase
pattern to run in alternating directions.
The chase step time may be controlled for up to 64
seconds per step. Step fade time is proportional to
the step time. If a channel is in the relay mode
during chaser operation, it will “snap” on and off
(zero fade time). The tables below show the details
of chaser settings.
ADDRESS & CONTROL SWITCH SETTINGS
CHASER PATTERN SELECTION
CHASER TIMING SELECTION
SWITCHES STEP TIME (Duration)
.5 seconds
1.0 seconds
2 seconds
4 seconds
8 seconds
16 seconds
32 seconds
64 seconds
MAINTENANCE AND REPAIR
TROUBLESHOOTING
•Check that you have power applied to the
dimmer.
•Check that all light fixtures are functional.
•Check the fuses.
•Check the control signal cable
•Check the settings of the dimmer DIP Switches
•Check the console setup for correct patching.
REPAIR
The only user serviceable parts are externally
accessible fuses. Replace fuses ONLY with 10
Amp, 250VAC, fast blow fuses. Internal service on
the unit by other than Lightronics authorized agents
will void the warranty. If service is required, contact
the dealer from whom you purchased the dimmer, or
Lightronics, Service Department, 509 Central Drive,
Virginia Beach, VA 23454. Tel: [phone].
WARRANTY INFORMATION AND
REGISTRATION – CLICK LINK BELOW
www.lightronics.com/warranty.html
NORMAL MODE SWITCH FUNCTIONS
RELAY C/D
RELAY A/B
(Up for relay)
NORMAL/CHASER
(down for normal)
ADDRESS
SWITCHES PATTERN
4 channel. sequence
4 channel. build
4 channel. build/unbuild
4 channel. random
3 channel. sequence +
3 channel build
3 channel build/unbuild
2 channel alternating
CHASER MODE SWITCH FUNCTIONS
RELAY C/D
RELAY A/B
(Up for relay)
NORMAL/CHASER
(up for chaser)
BOUNCE
CHASER CHASER
PATTERN TIMING

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AS42L COMPACT DIMMER
Revision 2.2 OWNER’S MANUAL 06/01/2022
www.lightronics.com
Lightronics Inc. 509 Central Drive, Virginia Beach, VA 23454 Tel: [phone]
LMX CHANNEL ASSIGNMENT SETTINGS
The DIP Switch Setting column shows the positions of the DIP switches on the dimmer. The Start Channel
column shows the resulting channel assignment for the first channel of the dimmer
EXAMPLE: If an LMX dimmer's DIP switches are set to  then the first channel of the dimmer will
respond to LMX channel 45. The remaining dimmer channels will respond to LMX channels 46, 47, 48 …etc.
DIP Switch
Setting
Start
Channel DIP Switch
Setting
Start
Channel
DIP Switch
Setting
Start
Channel
DIP Switch
Setting
Start
Channel
4 5 6 7 8 9 10
4 5 6 7 8 9 10
4 5 6 7 8 9 10
4 5 6 7 8 9 10

1

33

65

97

5

37

69

101

9

41

73

105

13

45

77

109

17

49

81

113

21

53

85

117

25

57

89

121

29

61

93

125