Pathway 8721, 8723, 8725, 8741, 8743 User Manual
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DMX ManualDecoderDMX ManualDecoder
Connect DMX512, AMX192 or Strand D54 control systems to analog dimmers
DMXDecoder
Microprocessor-based electronics
Rotary address switch selects unit address in
one-dimmer increments
Selectable status quo memory retention feature
maintains output levels at last known values for
five minutes upon loss of input control signal
Auto recognition of control protocol on 24
channel models
User-configurable positive or negative analog
outputs on 48 channel models
address select
5
5
4
4
6
6
3
3
7
7
2
2
8
8
1
1
9
9
0
0
X100 X10
mode
power
4
3
2
1
X1
5
6
7
8
9
0
4321
data
made in Canada
MODEL DESCRIPTION
8721
- DMX512 input, 24 channel output
8723
- AMX and DMX inputs, 24 channel output
8725
- D54 and DMX inputs, 24 channel output
8741
- DMX512 input, 48 channel output
8743
- AMX and DMX inputs, 48 channel output
8745
- D54 and DMX inputs, 48 channel output
8700
- 19" rack mount bracket kit
LED indicators for control signal detect and
microprocessor status
Built in output test function allows dimmers to
be turned on from front panel switches
19 inch rack mount kit available
GRAY
Gray Interfaces, 480C - 36 Avenue S.E.,
Calgary, AB T2G 1W4 Canada
tel (403) 243-8110 fax (403) 287-1281
Printed in Canada
SPECIFICATIONS
Dimensions, 24ch: 203mmx 44mmx165mm (8"x1 / "x6 / ")
48ch: 203mmx 44mmx279mm (8"x1 / "x11")
Shipping weight, 24 channel: 1.3 kg (2.9 lbs)
48 channel: 1.5 kg (3.3 lbs)
Power supply: 9-12 VDC @ 250mA (adapter incl.)
31
42
3
4
support@gray-interfaces.com
visit us at
www.gray-interfaces.com
ABOUT THE INTERFACEABOUT THE INTERFACE
SETUP INSTRUCTIONS
The Gray Interfaces 24 and 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 3. 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 onpage 4. The
shaded settings are factory defaults.
Now apply power to the decoder unit by plugging
the cord 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 on - the “DATA” LED will
illuminate if the decoder unit is receiving a valid
data signal. Now run some dimmers up toverify 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.
DMXDecoder
address select
5
4
6
3
7
2
8
1
9
0
X 100 X 10
1
1
Address select switches
Mode select DIP switches
2
3
LED indicators ( power and data )
3
2
mode
power
5
5
4
4
6
6
3
7
7
2
8
8
1
1
9
9
0
0
X 1
2
data
4321
madein Canada
3
SYSTEM LAYOUT
DMXDecoder
addressselect
5
4
6
3
7
2
8
1
9
0
X100 X10
mode
power
data
5
5
4
4
6
6
3
3
7
7
2
2
8
8
1
1
9
9
0
0
4321
X1
madein Canada
2
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