Pathway DMX Decoder - # 8721/8741 - Manual (Page 2)

Setup Instructions
DMXDecoder User Guide
System Layout
4 3 2 1 1 2 3 4 56 7 8 90 1 2 3 4 5 6 7 8 90 1 2 3 4 5 6 7 8 90
The Gray Interfaces 24 48 channel decoders have
been designed to permit easy, economical
upgrades to older lighting control systems with
analog dimmers. Standard input protocols are
USITT DMX-512 or AMX-192, or Strand D54.
A few simple steps are required to prepare your
interface unit for operation.
First, assemble your mating cables and ensure that
they conform to the connector pinouts as shown on
page . Plug the cable from your lighting control
board into the input connector on the rear panel of
the decoder unit. Note that AMX or DMX input
models include “in” and “thru” connectors, whereas
AMX and DMX input models only have “in”
connectors. The 25-pin output connector(s) of the
decoder unit wire directly to the dimmers’ analog
inputs.
Note: Unless otherwise ordered, all decoder
units are shipped with a factory default output
configuration of 0 to 10VDC. For other outputs,
refer to the configuration instructions on page
4.
Next set the starting address of the first output signal
using the three rotary address select switches.
Then, refer to the DIP Switch Settings on page 4.
The shaded settings are factory defaults.
Now apply power to the decoder unit by plugging the
card from the power supply into the power jack on
the rear of the box, and plug the power cube into a
120V outlet (the decoder can be left powered up all
the time, current draw is minimal). If the
microprocessor is operating properly, the “POWER”
LED on the front panel should illuminate. Turn your
control board “DATA” LED will illuminate if the
decoder unit is receiving a valid data signal. Now run
some dimmers up to verify that the decoder is
working.
Note that in test mode (DS2 on) dimmers may be
turned on individually without the use of a control
board. Simply dial up the desired dimmer number on
the rotary address switches.