Additional Unit Termination - Bard W48A2PQ Installation And Service Instructions Manual

Communication Wiring: Termination at Additional Wall-Mount Units
Wall-Mount Units 2 – 24
Control Board
1. Route the cable from the first wall-mount unit to the
terminal block of the second wall-mount unit. Make a
small service loop and attach EMI filter as shown.
Wall-Mount Units 2 – 24
Control Board
FIGURE 1.18
R+T+ / R-T- R+T+ / R-T-
RS485 RS485 PLAN
From Wall-Mount
Unit 1 RS485
2. Connect the wires matching the terminal
designations (+/-) of the controller terminals.
R+T+ / R-T-
PLAN
RS485
Cap the loose drain with a wire nut or
electrical tape.
From Wall-Mount
Unit 1 RS485
Manual 2100-642
Page 27 of 82