Verasys® 32 Point 24 VAC Application Controller Installation Instructions
7
Stacked System and Sensor Bus Terminal Block
A dual-stacked connector serves as the system bus and sensor bus port on the Verasys Controllers. The upper row
on the connector is the system bus port. The lower connector row is the sensor bus port.
Figure 5: Stacked System and Sensor Bus Terminal Block
System Bus Terminal Block
The System Bus terminal block is a blue, removable, 4-terminal plug that fits into a board-mounted jack. Wire the
removable system bus terminal block plugs on the controller on the top row of the stacked connector. Wire the other
field controllers in a daisy-chain configuration using 3-wire twisted, shielded cable, as shown in the following figure.
See Table 7
for more information on functions, ratings, requirements and cables.
Figure 6: System Bus Terminal Block Wiring
Note:
The System Bus Shield (SHD) terminal is isolated and you can use it to connect the shields, in a daisy-
chain configuration for system bus wiring.
Sensor Bus Terminal Block
The Sensor Bus terminal block is a brown, removable, 4-terminal plug that fits into a board-mounted jack.
Stranded 3-Wire Twisted Shielded Cable
Isolated Shield
Connection
Terminal
To Next
Device on
the
System
Bus
Segment
System Bus
Terminal
Block Plugs
Terminating Device
on System Bus Segment
To Next
Device on
the
System
Bus
Segment
Daisy Chained Device
on System Bus Segment
SHD
+
CO
M
SHD
+
CO
M
