1St Unit Termination; Control Board - Bard W48A2PQ Installation And Service Instructions Manual

Communication Wiring: Termination at the First Wall-Mount Unit
Wall-Mount Unit 1

Control Board

1. From the controller, extend the shielded cable through a separate conduit
and route to the provided terminal block next to the wall-mount control
board.
Note that the terminal block label is clearly marked "+" and "-". These
connections are polarity-sensitive. Two-wire communication from control
board is prewired to terminal block. Make sure to match "+" and "-"
symbols on controller terminal blocks.
Wall-Mount Unit 1
Control Board
Wall-Mount Unit 1
Control Board
Manual 2100-642
Page 26 of 82
FIGURE 1.17
R+T+ / R-T-
PLAN
RS485
R+T+ / R-T-
RS485
From LC5000-100
Controller
0
R+T+ / R-T- 2.
RS485 PLAN
From LC5000-100 Controller
R+T+ / R-T-
PLAN
RS485
From LC5000-100 Controller
To Wall-Mount Unit 2
Control Board RS485
Connect the wires matching the terminal
designations (+/-) of the controller terminals.
Leave the drain wire loose.
3. Connect another cable in a similar
fashion ("daisy chain") to route in
conduit to the second wall-mount unit.
Connect both drain wires with wire nut.