Wireless Network Applications - Johnson Controls FEC16 Series Installation Instructions Manual

FC Bus Port
The FC Bus port on the front of the FEC is an RJ-12,
6-position modular jack that provides a connection for
the Wireless Commissioning Converter or ZFR1811
Wireless Field Bus Router.
The FC Bus port is connected internally to the FC Bus
terminal block. See Table 3 for more information. The
FC Bus Port pin assignment is shown in Figure 6.
Figure 6: Pin Number Assignments for
Sensor, SA Bus, and FC Bus Ports on
FEC, IOM, and VMA16
Sensor Port
The Sensor (SA Bus) port on the bottom of the FEC
(Figure 3) is an RJ-12, 6-position modular jack that
provides a connection for the Wireless Commissioning
Converter, the VAV Balancing Tool, specified network
sensors, or other SA Bus devices with RJ-12 plugs.
A DIS1710 Local Controller Display also can be
connected to the SA Bus port (but only on FEC models
without integral display and push buttons).
The Sensor port is connected internally to the SA Bus
terminal block. See Table 3 for more information.The
Sensor Port pin assignment is shown in Figure 6.
Supply Power Terminal Block
The 24 VAC supply power terminal block is a gray,
removable, 3-terminal plug that fits into a board-
mounted jack on the top right of the FEC.
Wire the 24 VAC supply power wires from the
transformer to the HOT and COM terminals on the
terminal plug as shown in Figure 7. The middle
terminal on the supply power terminal block is not
used. See Table 3 for more information.
6 FEC16 Extended Temperature Field Equipment Controller Installation Instructions
Figure 7: 24 VAC Supply Power
Terminal Block Wiring
The supply power wire colors may be different on
transformers from other manufacturers. Refer to the
transformer manufacturer's instructions and the project
installation drawings for wiring details.
IMPORTANT: Connect 24 VAC supply power to the
FEC and all other network devices so that
transformer phasing is uniform across the network
devices. Powering network devices with uniform
24 VAC supply power phasing reduces noise,
interference, and ground loop problems. The FEC
does not require an earth ground connection.

Wireless Network Applications

The FEC also can be installed in a wireless application.
To configure a controller for use with the ZFR1800
Series Wireless Field Bus system:
1. Wire the input/output terminals and SA Bus.
Note: In wireless network applications, do not
connect any wires to the FC Bus terminal block.
2. Connect the ZFR1811 Wireless Field Bus Router to
the FC Bus port (RJ-12 modular jack) on the front
of the FEC.
3. Ensure that the FEC device address DIP switches
are set to the correct device address. See Setting
the Device Address.
4. Position DIP switch 128 to ON to enable wireless
operation on the FEC.
For more information on installing an FEC in a wireless
configuration, refer to the ZFR1811 Wireless Field Bus
Router Installation Instructions (Part No. 24-10325-1).