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 2.1
10/08/2021

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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: [phone]
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:
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 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

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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: [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].
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 2.0 OWNERS MANUAL 10/08/2021
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
All Lightronics products using DIP switches for LMX address assignments conform to this table.
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

All Lightronics products are warranted for a period of TWO/FIVE YEARS from the date of
purchase against defects in materials and workmanship.
This warranty is subject to the following restrictions and conditions:
A) If service is required, you may be asked to provide proof of purchase from an authorized
Lightronics dealer.
B) The FIVE YEAR WARRANTY is only valid if the warranty card is returned to Lightronics
accompanied with a copy of the original receipt of purchase within 30 DAYS of the
purchase date, if not then the TWO YEAR WARRANTY applies. Warranty is valid only for
the original purchaser of the unit.
C) This warranty does not apply to damage resulting from abuse, misuse, accidents, shipping,
and repairs or modifications by anyone other than an authorized Lightronics service
representative.
D) This warranty is void if the serial number is removed, altered or defaced.
E) This warranty does not cover loss or damage, direct or indirect arising from the use or
inability to use this product.
F) Lightronics reserves the right to make any changes, modifications, or updates as deemed
appropriate by Lightronics to products returned for service. Such changes may be made
without prior notification to the user and without incurring any responsibility or liability for
modifications or changes to equipment previously supplied. Lightronics is not responsible
for supplying new equipment in accordance with any earlier specifications.
G) This warranty is the only warranty either expressed, implied, or statutory, upon which the
equipment is purchased. No representatives, dealers or any of their agents are authorized
to make any warranties, guarantees, or representations other than expressly stated herein.
H) This warranty does not cover the cost of shipping products to or from Lightronics for
service.
I) Lightronics Inc. reserves the right to make changes as deemed necessary to this warranty
without prior notification.
WARRANTY

Lightronics Inc. 509 Central Drive Virginia Beach, VA 23454 20050125