Figure 5: FC bus terminal block wiring
Table 2: FC bus configuration
Description
1 Wiring for a terminating device on the FC bus
2 FC bus terminal blocks
3 Wiring for a daisy-chained device on an FC bus segment
4 Connects to the next device on the FC bus
5 Isolated Shield connection terminal
Note: The Shield terminal (SHD) on the FC Bus
terminal block is isolated and can be used to connect
the cable shields on the bus (Figure 5).
SA bus terminal block
The SA Bus terminal block is an orange, removable, 4-
pin terminal block with +15 VDC that fits into a board-
mounted pin header.
When connecting an SA Bus device to the controller, wire
the SA Bus terminal block on the controller and other
SA Bus devices in a daisy-chain configuration using 4-
wire twisted, shielded cable as shown in Figure 6. For
more information about SA Bus terminal functions,
requirements, and ratings, see Table 7.
Figure 6: SA bus terminal block wiring
Table 3: SA bus configuration
Description
1 Wiring for a terminating device on SA bus
2 SA bus terminal blocks
3 Wiring for a daisy chained device on SA bus
4
Cable shield connection
Note: Connect the shields to ensure they are
continuous the entire length with only one ground
location.
5 Connects to the next device on the SA bus
Note: Stranded, 4-wire (2 twisted pair) shielded
cable. One twisted pair is the + and - leads. The
second pair is COM and POWER.
Note: Do not use the modular SA Bus port and the
terminal block SA Bus simultaneously. Only use one
of these connections at a time.
Note: The CVM controller is the EOL for the SA Bus.
Modular ports
The modular SA and FC bus ports on the face of the CVM
(Figure 7) are RJ-12 (6-position) modular jacks as shown in
Figure 7.
The modular SA Bus port provides a connection for the
MAP Gateway, VAV Balancing Tool, FX- DIS1710 Local
Controller Display, WRZ78xx Series One-to-One Wireless
Transmitter, and NS Series sensors.
F4-CV Series VAV Terminal Equipment Controllers Installation Guide 5
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