
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.
Important:
Connect 24 VAC supply power to the controller 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 controller does not require
an earth ground connection.
Wireless Field Bus Applications
When configured for BACnet MS/TP communication, the controller can also be installed in a ZFR/ZFR Pro Wireless
Field Bus System.
To configure a controller for use with a 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. (Connect the
SA/FC terminal block on an Input/Output Module (IOM) to an SA bus only.)
2. Connect the ZFR/ZFR Pro Wireless Field Bus Router to the FC bus port (RJ-12 modular jack) on the front of the
controller.
3. Ensure that the controller's device address DIP switches are set to the correct device address. See
Setting the
Device Addresses
.
4. Set DIP switch 128 to ON, which enables wireless operation on the controller.
For more information on the ZFR Pro Wireless Field Bus system, refer to the
WNC1800/ZFR182x Pro Series
Wireless Field Bus System Product Bulletin (LIT-12012320).
For more information on the ZFR Wireless Field Bus system, refer to the
ZFR1800 Series Wireless Field Bus
System Product Bulletin (LIT-12011336).
Termination Diagrams
A set of Johnson Controls
®
termination diagrams provides details for wiring inputs and outputs to the controllers.
See the figures in this section for the applicable termination diagrams.
9
FEC1611 and FEC1621 Field Equipment Controller Installation Instructions