FC bus terminal block (or N2 protocol as
required)
The FC bus terminal block is a blue, removable, 4-
terminal plug that fits into a board-mounted pin
header.
Use a 3-wire twisted, shielded cable, as shown in
Figure 4, to wire the removable FC bus terminal
block plugs on the controller, and other controllers,
in a daisy-chain configuration. For more information
about FC Bus terminal functions, requirements, and
ratings, see Table 7.
Figure 4: 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 block plugs
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 FC bus Shield (SHLD) terminal is
isolated and can be used to connect (daisy
chain) the shields for FC bus wiring.
SA bus terminal block
The SA Bus terminal block is an orange, removable,
4-terminal plug that fits into a board-mounted jack.
Use a 4-wire twisted, shielded cable, as shown in
Figure 5, to wire the removable SA Bus terminal
block plugs on the controller, and other SA bus
devices, in a daisy-chain configuration. See
Terminal wiring guidelines, functions, ratings, and
for more information.
Figure 5: SA Bus Terminal Block Wiring
Table 3: SA bus configuration
Description
1
Wiring for a terminating device on SA bus
2
SA bus terminal block plugs
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:
The POWER terminal supplies 15 VDC.
The POWER terminal can be used to connect
(daisy chain) the 15 VDC power leads on the SA
bus.
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 CGM controller is the EOL for the SA
Bus.
FC bus port
The FC bus port on the front of the controller is
an RJ-12, 6-position modular jack that provides
a connection for the Mobile Access Portal (MAP)
Gateway, or the ZFR/ZFR Pro Wireless Field Bus
Router.
The FC bus port is connected internally to the FC bus
terminal block. See Table 7 for more information.
The FC bus port pin assignment is shown in Figure 6.
M4-CGM General Purpose Application Controllers Installation Guide
5
