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AS40D COMPACT DMX DIMMER
Version 2.1
OWNERS MANUAL
10/08/2021
www.lightronics.com
Lightronics Inc.
509 Central Drive, Virginia Beach, VA 23454
tel 757 486 3588
DESCRIPTION
The AS40D is a compact 4 channel light dimmer. It
has a maximum capacity of 600 Watts per channel
and a maximum TOTAL load capacity of 2400
Watts. It is supplied with an input power cord which
may be connected to a 120 VAC, 20 Amp power
circuit. The AS40D is intended for INDOOR USE
ONLY. The unit operates using the USITT DMX-512
protocol. The AS40D may be operated in a relay
(non-dim) mode. The unit will also function as a
stand-alone chaser and has eight primary preset
chase patterns which may be used.
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 one end of the dimmer to install a
lighting bar pipe clamp and suitable safety cables.
POWER CONNECTIONS:
Extending from the chassis is a 20 Amp line cord for
connection to a 120 VAC, 20 Amp, grounded
service. Total capacity of the AS40D is 2400 watts.
LOAD CONNECTIONS:
There is one Edison Plug connector provided for
each AS40D output channel. They are located
along the left and right edges of the unit. The
markings on the cover indicate the channel numbers
for each connection. The maximum capacity of
each channel is 600 watts.
CONTROL SIGNAL CONNECTIONS:
The male five pin XLR connector on the unit end
panel connects to the control console. The female
connector is for connection to additional dimmers.
The AS40D dimmer is compatible with the USITT
DMX-512 protocol.
Note that the DMX standard does not provide for
console power via the dimmer chain. Therefore the
DMX console used with AS40D dimmers must be
powered by other means.
Wiring information for the DMX control signal
connectors is shown on the unit top cover.
OPERATION
NORMAL MODE (non-chaser)
A green LED in the end panel will indicate that a
valid control signal (DMX) 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 console channels 1-4. Moving the switch
position on the far right to up will set the dimmer to
respond to channels 5-8. A complete table of
channel assignments is provided at the end of this
manual. You can address up to 512 channels using
DMX control.
RELAY MODE: Pairs of channels (1/2 and/or 3/4)
may be switched into 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 approximately 50%. The
2 left hand switches on the DIP switch block control
relay mode channel selection.
NORMAL MODE SWITCH FUNCTIONS
CHASER MODE
When operating in the chaser mode, the AS40D
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.
ADDRESS
NORMAL/CHASER
(DOWN FOR NORMAL)
1/2 DIM/RELAY
3/4 DIM/RELAY
UP = RELAY
DOWN = DIM
CHASSIS END VIEW
