Bard W48A2PQ, Installation And Service Instructions Manual

Page: 27 / 82

Manual 2100-642
Page 27 of 82
RS485
R+T+ / R-T-
RS485
R+T+ / R-T-
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.
FIGURE 1.18
Communication Wiring: Termination at Additional Wall-Mount Units
2. Connect the wires matching the terminal
designations (+/-) of the controller terminals.
Cap the loose drain with a wire nut or
electrical tape.
From Wall-Mount
Unit 1 RS485
From Wall-Mount
Unit 1 RS485
Wall-Mount Units 2 – 24
Control Board
Wall-Mount Units 2 – 24
Control Board
PLAN
PLAN
RS485
R+T+ / R-T-