Bard MEGA-TEC W090A, Service Instructions Manual

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Manual 2100-705B
Page 24 of 43
Communication Wiring
Connect the communication wiring from the wall-mount units to the controller in the manner shown in Figures 20,
21 or 22.
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 24 and 25 on pages 27 and 28). Attach
communication wire filters as shown in Figures 20, 21 or 22.
Do not run communication wiring in same conduit as
supply wiring. Route communication wiring and power supply wiring in their own separate conduits.
LC6000 Controller
Wall-Mount Unit
Wall-Mount Unit
FIGURE 20
Communication Wiring (Daisy Chain Method)
Filter
Filter
FIGURE 21
Communication Wiring (Alternate Method)
Filter
Filter
Wall-Mount Unit
Wall-Mount Unit
LC6000
Controller
In addition to the "daisy chain" method of connecting the communication wiring shown in Figure 20, the wall-mount
units can also be connected in the manner shown in Figure 21. If connecting wall-units this way, be sure to place
the communication wire filters in the positions shown in Figure 21. See Figure 22 for more information on the
correct placement of the communication wire filters depending on the wiring method used.