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DB612 DISTRIBUTED DIMMING BAR
Version: 1.1
OWNERS MANUAL
01/06/2022
www.lightronics.com
Lightronics Inc
509 Central Drive, Virginia Beach, VA 23454
Tel 757 486 3588
CHANNEL OUTPUT CONNECTIONS (LAMP LOAD
CONNECTIONS)
Dimmer channel output connectors are on the face
of the unit. Two connections are available for each
channel (the optional twist-lock panels have one
connection per channel). The numbering for the
channels is shown on the unit center faceplate. The
maximum load for each channel is 1200 Watts or 10
Amps.
CONTROL SIGNAL
Connect a Lightronics or other DMX512 compatible
control console to the DB612 using the MALE 5-pin
XLR connector located on the center faceplate of the
unit. This connector is marked DMX IN. The
FEMALE 5-pin XLR connector is provided so you
can connect multiple dimmers as a system. This
connector is marked DMX OUT and will pass the
DMX signal through to additional devices on a DMX
chain. Connector wiring information is given below.
DMX TERMINATION
A DMX device chain should be electrically
terminated at the last device (and only the last
device) on the control chain. A DMX terminator
consists of a 120 Ohm resistor connected across the
DMX DATA + and DMX DATA - lines. The DB612
contains a built in terminator which may be switched
in or out. The left end DIP switch on the unit center
panel will apply the terminator if moved to the UP
position.
OPERATION
CIRCUIT BREAKERS
A small plate near one end of the unit contains a 10
Amp magnetic circuit breaker for each dimmer
channel. To operate a channel, the associated
circuit breaker must be closed. Channel numbers
for the circuit breakers are located on the circuit
breaker panel. If the circuit breaker will not remain
closed then there is an overload at the lamp for that
channel which MUST be corrected before operation
can continue.
INDICATORS
There is a neon lamp for each channel on the center
faceplate. This lamp indicates when INPUT power is
available for the channel (Input power on and
channel circuit breaker closed). There is also a row
of six red LEDs on the center faceplate which give
an approximate indication of the channel output
intensity.
SETTING THE UNIT STARTING ADDRESS
The DB612 may be addressed to any block of six
DMX addresses between 1 and 507. Set the rotary
decade switches on the unit center panel to the
number corresponding to the DMX address which
will be used for the first channel of the DB612. The
remaining five channels will be assigned to
consecutive higher DMX addresses. Multiple
DB612s may be set to the same address block.
CHANNEL TESTING
DB612 channel operation may be tested at the unit.
The six small pushbuttons at the lower right of the
center faceplate will activate the associated dimmer
channel to full ON and OFF when pushed. In
addition to channel testing, this function is useful
when adjusting or focusing lamps. A channel which
has been turned on by the test buttons can be
turned back off at the DMX console by setting the
associated channel fader to full ON and then back
OFF. The red LED indicators located directly above
the buttons indicate when the channel is on.
RELAY MODE OPERATION
Individual channels of the DB612 may be switched
into the relay mode. In this mode the dimmer
channel will either be fully on or fully off depending
on the channel intensity setting at the control
console. The channel will remain off until a console
fader position threshold point is crossed. When this
occurs, the corresponding dimmer channel will
switch to a full on condition. This mode is useful to
control lamps and other lighting devices which
cannot be dimmed.
There is a block of seven DIP switches on the center
panel of the unit. The six right hand switches are
used to switch the corresponding channel into the
PIN NUMBER
SIGNAL NAME
1
DMX Common
2
DMX Data -
3
DMX Data +
4
Not Used
5
Not Used
