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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 expansion module 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 expansion module does not require an earth ground connection.
Wireless network applications
The expansion module can also be installed in a wireless application using an FX-ZFR/ZFR Pro
Wireless Field Bus Router.
To configure an expansion module for use with the FX-ZFR/ZFR Pro Series Wireless Field Bus
system:
Note: FX-PCXs can communicate wirelessly on the FC bus only.
1.
Connect the FX-ZFR181x or FX-ZFR182x Wireless Field Bus Router to the FC bus port (RJ-12
modular jack) on the front of the expansion module.
2.
Ensure that the expansion module's device address DIP switches are set to the correct device
address. See
Setting the device
3.
Set DIP switch 128 to ON, which enables wireless operation on the expansion module.
For more information on the FX-ZFR 1800 Wireless Field Bus system, refer to the FX-ZFR Series
Wireless Field Bus System Bulletin (LIT-12011660). For more information on the FX-ZFR Pro Wireless
Field Bus system, refer to the WNC1800/FX-ZFR182x Pro Series Wireless Field Bus System Bulletin
(LIT-12012378).
Termination details
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.
10
FX-PCX2721 Expansion Input/Output Module Installation Instructions
Figure 7: 24 VAC supply power terminal block wiring
address.
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