Verasys® 32 Point 24 VAC Application Controller Installation Instructions
8
Wire the removable Sensor Bus terminal block plugs on the lower port of the Dual Stacked Connector to the
controller, and other Sensor bus devices in a daisy-chain configuration using 4-wire twisted, shielded cable as
shown in Figure 7. See Table 7 for more information on functions, ratings, requirements and cables.
Figure 7: Sensor Bus Terminal Block Wiring
Note:
The Sensor BUS PWR terminal supplies 15 VDC. You can use the PWR terminal to connect, in a daisy-
chain configuration, the 15 VDC power leads on the Sensor bus.
Sensor Bus Port
The Sensor Bus port on the middle left side of the controller (Figure 11) is an RJ-12, 6-position modular jack that
provides a connection for the SBH, the VAV Balancing Tool, specified network sensors, or other Sensor Bus devices
with RJ-12 plugs.
The Sensor port connects internally to the Sensor bus terminal block. See Table 7
for more information. The sensor
bus port pin assignment is shown in Figure 8
.
Figure 8: Pin Number Assignments for Sensor Bus Ports on Verasys Application Controllers
Modbus Terminal Block
The Modbus terminal block is a green, removable, 3-terminal plug that fits into a board-mounted jack.
Wire the removable Modbus terminal block plugs on the controller, and wire the other field controllers in a daisy-
chain configuration using 3-wire twisted, shielded cable as shown in Figure 9. See Table 7 for more information on
functions, ratings, requirements and cables.
Stranded, 4-Wire (2 Twisted Pair) Shielded Cable
(One twisted pair is the and leads.
+
-
The second pair is COM and PWR.)
Cable Shield
Connection
To Next
Device on
the Sensor Bus
Sensor Bus
Terminal
Block Plugs
Terminating Device
on Sensor Bus
Daisy Chained Device
on Sensor Bus
To Next
Device on
the Sensor Bus
PWR
+
CO
M
PWR
+
CO
M
Power
(15 VDC)
Sensor Bus +
Sensor Bus
-
Bus and Power Common
Power
(15 VDC)
Sensor Bus Port
(RJ-12 Modular Jack)
Bus and Power Common
2
3
4
5
6
1
