ZFR1800 Series Wireless Field Bus System Technical Bulletin 31
Port Swap on Wireless-Enabled VMAs
On the VMA1610/1620 models, when the 128 bit switch on the address DIP
switch is turned on (to enable wireless operation), the FC and SA Bus are swapped
internally. All connections that were SA Bus (RJ-12 and terminal blocks) are now
FC Bus connections. The terminal block connections marked for the FC Bus are
now connected internally to the SA Bus.
If you have an installation that calls for a wired IOM connected to the SA Bus of a
wireless-enabled VMA1610/1620 field controller, connect the IOM to the FC Bus
Terminals (which are really the SA Bus terminals on a VMA1610/1620 field
controller in wireless mode) as indicated in Figure 12 and Figure 13.
Note: The VMA1615/1630 controller have RJ-12 connectors on the FC bus and
SA bus. These controllers do not require port swapping when in wireless
mode.
Figure 12: Connecting IOM to Wireless-Enabled VMA1610/1620 Field
Controller
VMA16
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FC Bus
Note: Do not wire any other devices directly
to the SA Bus terminal block.
Figure 13: Wiring a Discharge Air Netsensor, Zone Netsensor with Terminal
Block, or IOM to a Wireless-Enabled VMA1610/1620 Field Controller