Communication Wiring - Bard MULTI-TEC W18AAPA Service Instructions Manual

Communication Wiring

Connect the communication wiring from the wall-mount units to the controller in the manner shown in Figures 18,
19 or 20. The daisy chain does not need to follow the addressing order. The communication wire should be 2-wire,
18 gauge shielded cable with drain. Any color can be used. Be sure to match "+" and "-" symbols on controller
terminal blocks to prewired unit control terminal block (see Figures 22 and 23 on pages 31 and 32). Attach
communication wire filters as shown in Figures 18, 19 or 20. Do not run communication wiring in same conduit as
supply wiring. Route communication wiring and power supply wiring in their own separate conduits.
Filter
Wall-Mount Unit
In addition to the "daisy chain" method of connecting the communication wiring shown in Figure 18, the wall-mount
units can also be connected in the manner shown in Figure 19. If connecting wall-units this way, be sure to place
the communication wire filters in the positions shown in Figure 19. See Figure 20 for more information on the
correct placement of the communication wire filters depending on the wiring method used.
Wall-Mount Unit
Manual 2100-676D
Page 28 of 45
FIGURE 18
Communication Wiring (Daisy Chain Method)
Wall-Mount Unit
FIGURE 19
Communication Wiring (Alternate Method)
LC
Controller
Filter
Filter
LC6000 Controller
Wall-Mount Unit
Filter