Johnson Controls FEC26 Series User Manual

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 ZFR/ZFR Pro
Wireless Field Bus Router.
The FC bus port is connected internally to the FC bus
terminal block. See Comm Bus and Power Supply
Terminal Block Rating and Requirements Table for more
information. The FC bus Port pin assignment is shown
in Figure 6.
Figure 6: Pin Number Assignments for Sensor,
FC Bus, and SA Bus Ports on Controllers
Sensor Port
The Sensor (SA Bus) port on the bottom of the controller
() 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.
When the FEC is configured for N2 communication, the
SA Bus port must be used to download and commission
the controller. 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 6 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 controller.
Wire the 24 VAC supply power wires from the transformer
to the HOT and COM terminals on the terminal plug as
shown below. The middle terminal on the supply power
terminal block is not used. See Table 6 for more
information about the Supply Terminal Block.
Figure 7: 24 VAC Supply Power Terminal Block Wiring
Note: 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.
6FEC26 Field Equipment Controllers Installation Instructions

Johnson Controls FEC26 Series Specifications

General

Brand	Johnson Controls
Model	FEC26 Series
Category	Controller
Language	English