Fec Terminal Blocks And Bus Ports - Johnson Controls FEC26 Installation Instructions Manual

Wiring
CAUTION: Risk of Electric Shock.
! Disconnect the power supply before
making electrical connections to avoid
electric shock.
IMPORTANT: Do not connect supply power to the
controller before finishing wiring and checking all
wiring connections. Short circuits or improperly
connected wires can result in damage to the
controller and void any warranty.
IMPORTANT: Do not exceed the controller
electrical ratings. Exceeding controller electrical
ratings can result in permanent damage to the
controller and void any warranty.
IMPORTANT: Use copper conductors only. Make
all wiring in accordance with local, national, and
regional regulations.
IMPORTANT: Electrostatic discharge can damage
FEC components. Use proper electrostatic
discharge precautions during installation, setup, and
servicing to avoid damaging the FEC controller.
For detailed information on configuring and wiring an
MS/TP Bus, Field Controller (FC) Bus, and Sensor
Actuator (SA) Bus, refer to the MS/TP Communications
Bus Technical Bulletin (LIT-12011034).

FEC Terminal Blocks and Bus Ports

See Figure 3 for terminal block and bus port locations
on the FEC26 extended temperature controller.
Observe the following guidelines when wiring an FEC
controller.
Input and Output Terminal Blocks
All of the fixed input terminal blocks are mounted on
the bottom of the FEC. The output terminal blocks are
mounted on the top of the controller. See Table 1 for
more information.
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
FEC, and other field controllers in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown in Figure 4. See Table 3 for more information.
Note: The Shield terminal (SHLD) on the FC Bus
terminal block is isolated and can be used to connect
the cable shields on the bus (Figure 4).
FEC26 Extended Temperature Field Equipment Controller Installation Instructions
Figure 4: FC Bus Terminal Block 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
FEC and other SA Bus devices in a daisy-chain
configuration using 4-wire twisted, shielded cable as
shown in Figure 5. See Table 3 for more information.
Figure 5: SA Bus Terminal Block Wiring
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 Bluetooth® Wireless Commissioning Converter,
ZigBee™ wireless dongle, 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).
5