E
QUIPMENT
I
NSIDE
VIEW
30
AlphaXpress 8731 Sign Installation and Maintenance Manual (pn 1508610601 rev. A)
E
P4
AC POWER INPUT
AC power attaches to the power supply through this connection.
F
P3
ADDRESSING PORT
This address is set using an address plug (pn 1509100701).
Note: This connection selects BAUD rate, controls power supply on / off function, and
addressing the power distribution monitor board. Removing the address plug will
turn off the power supply.
G
P2
COMM PORT
RS422 communications
H
LD1
AC BAD
On = Indicates the incoming voltage is below 90VAC.
LD2
DC BAD
On = Indicates DC output is below 12.3VDC.
LD3
AC GOOD
On = Indicates the incoming voltage is above 90VAC.
LD4
DC GOOD
On = Indicates DC output is greater than 12.3VDC.
LD5
FAULT
On = PDMB (Power Distribution Monitor Board) detected a power fault condition has
occurred.
LD6
COMM
Flashing = PDMB is receiving communications from the controller on the RS422 bus.
LD7
RUN
Flashing = PDMB processor is running its tasks.
I
P1
DC POWER OUTPUT
+12VDC is supplied to all connected electronic components.
• V– = Violet wiring
• V+ = Orange wiring
Jumper wires
Refer to the appropriate wiring
diagram for your sign model. These
are preset from the factory with the
correct settings.
Plugs into P3