FC bus terminal block
The FC bus terminal block is a blue, removable, 4-terminal
plug that fits into a board-mounted jack.
Wire the removable FC bus terminal block plugs in a
daisy-chain configuration. Use a stranded 3-wire twisted,
shielded cable as shown in the following figure.
Figure 4: FC bus terminal block wiring
Table 1: FC bus terminal block wiring
Callout Description
1
Daisy-chained device on the FC bus segment
2
Terminating device on the FC bus segment
3
Connection to another device on the FC bus segment
4
Isolated shield connection terminal
Note:
The shield terminal (SHLD) on the FC bus
terminal block is an isolated terminal that you can
use to connect the cable shields on the bus.
SA bus spade lugs
Wire the SA bus spade lugs in a daisy-chain configuration.
Use a stranded 4-wire twisted, shielded cable as shown
in the following figure. The 4-wire cable consists of two
twisted pairs. The first twisted pair is the + and – leads.
The second pair is COM and SA PWR.
Figure 5: SA bus spade lug wiring
Table 2: SA bus spade lug wiring
Callout Description
1
Terminating device on the SA bus
2
Daisy-chained device on the SA bus
3
Cable shield connection
4
Connection to another device on the SA bus
TSTAT port
The TSTAT port on the face of the controller is an RJ-45,
8-position modular jack used to easily connect one
TE730 series analog (non-communicating) sensor to
the controller. The modular TSTAT port provides 15
VDC, SA bus communications, and analog signals for
zone temperature, zone setpoint, and temporary zone
occupancy override.
Figure 6: Pin number assignments for the TSTAT port
Table 3: Pin number assignments for the TSTAT port
Callout Description
1
Power (+15 VDC)
2
Zone setpoint
3
Zone sensor
4
Sensor common
5
SA -
6
SA +
7
Setpoint common
8
SA bus common
SA bus port
The SA bus port on the face of the controller is an RJ-12,
6-position modular jack that provides a connection for
network sensors with RJ-12 plugs. The preferred method
of connecting the devices to the SA bus is through the SA
bus spade lugs, but the application does not prevent you
from using the SA bus port connection. Make sure that
you connect the correct device to the SA bus port.
Note:
Do not use the modular SA bus port and the
SA bus spade lug connection simultaneously. Only
use one of these connections at a time.
VAV1717 and VAV1732 VAV Controllers Installation Guide
7