B-3
Incorrect Routing for Wiring
Relay Station RS422 Pin-outs
The
R/F Relay Stations
are connected by twisted pair wire -- use
Belden 1227A1, Cat 5 wire,
or equivalent. The
Unlabeled Port
on the
Base Station
and the
Unlabeled Port
on the
Relay Station
are
connected with a straight cable using the following pin-outs:
Base Connector
Pin #
Relay Connector
Receive Data +
5
Transmit Data +
Receive Data -
6
Transmit Data -
Transmit Data +
2
Receive Data +
Transmit Data -
3
Receive Data -
Make a cable with 5-5, 6-6, 2-2, and 3-3 (a straight cable); but, be
careful that you select wires so that the
2 wire is in the twisted pair
with the 3 wire, and the 5 wire is in the twisted pair with the 6 wire
.
For all RJ Cable pin numbers, number from left to right with the metal pin
side of the connector facing you and the cable running to the down position
Relay Test Plan and Failures
Relay Failure
Relay Station failures are often cable-related. If a Terminal puts out a
“Who Can Hear Me?” message and a Relay that is for some reason
not
connected to the Base Station (bad cable, cut cable, broken connectors)