detailed information on wiring an N2 bus, refer to the
N2
Communications Bus Technical Bulletin (LIT-636018)
.
FEC terminal blocks and bus ports
See Figure 3 for terminal block and bus port locations on
the FEC16 controller. Observe the following guidelines
when wiring a controller.
Input and Output terminal blocks
All of the fixed input terminal blocks are mounted on
the bottom of the controller and the output terminal
blocks are mounted on the top of the controller. See Table
2 for more information about I/O terminal functions,
requirements, and ratings.
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 on
the controller, and other controllers in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown in Figure 4. See Table 4 for more information.
Figure 4: FC bus terminal block wiring
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 a brown, removable, 4-
terminal plug that fits into a board-mounted jack.
Wire the removable SA Bus terminal block plugs on the
controller and other SA Bus devices in a daisy-chain
configuration using 4-wire twisted, shielded cable as
shown in Figure 5. See Table 4 for more information.
Figure 5: SA bus terminal block wiring
Note:
The SA PWR terminal supplies 15 VDC. The SA
PWR terminal can be used to connect (daisy chain)
the 15 VDC power leads on 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
Wireless Commissioning Converter or any models of the
ZFR or ZFR Pro Routers for wireless field bus applications.
The FC bus port is connected internally to the FC bus
terminal block. See Table 4 for more information. The FC
bus Port pin assignment is shown in Figure 6.
Note:
When an FEC is configured for N2 network
communication, the FC bus port is not used.
Figure 6: Pin number assignments for sensor, SA bus,
and FC bus ports on Controllers
Sensor port
The Sensor (SA Bus) port on the bottom of the controller
(Figure 3) is an RJ-12, 6-position modular jack that provides
a connection for the Wireless Commissioning Converter,
Metasys
System FEC1611 and FEC1621 Field Equipment Controller Installation Guide
4