Johnson Controls fx-pcx3731-0 Expansion I/o Module

Product Description

The JOHNSON CONTROLS fx-pcx3731-0 is an expansion input/output module designed to extend the control capacity of FX-PC series building automation controllers. It adds 8 binary inputs and 8 binary outputs to a host controller, allowing integration of additional field devices such as switches, relays, and digital sensors without replacing the primary controller. This module is installed by licensed controls technicians and building automation professionals working on commercial HVAC and facility management systems. It is part of the FX-PCX expansion line, engineered to pair directly with compatible FX-PC series controllers.

The fx-pcx3731-0 is suited for commercial building automation applications where additional discrete I/O points are required beyond the capacity of the base controller. Typical install scenarios include multi-zone HVAC systems, lighting control integration, and equipment monitoring in commercial or light industrial facilities. Controls technicians use this module to scale an existing FX-PC series installation without requiring a full controller upgrade or additional standalone hardware.

Key Features

• Adds 8 binary inputs for monitoring digital field devices such as switches and digital sensors
• Adds 8 binary outputs for control of relays, actuators, and other discrete loads
• Designed as an expansion module for FX-PC series controllers, enabling scalable I/O without controller replacement
• Part of the FX-PCX expansion module family for consistent integration within the FX-PC ecosystem

Compatibility

Designed for use with FX-PC series controllers as an FX-PCX expansion I/O module. Consult Johnson Controls documentation to confirm compatibility with specific FX-PC series controller models before ordering.

Installation Notes

Installation should be performed by a qualified building automation or controls technician familiar with Johnson Controls FX-PC series hardware. Power down the host controller and all associated field devices before connecting or disconnecting the expansion module. Follow applicable local codes and manufacturer wiring guidelines when connecting binary inputs and outputs to field devices. Verify firmware and configuration compatibility between the expansion module and the host controller prior to commissioning.

Technical Specifications

• Binary Inputs: 8
• Binary Outputs: 8
• Module Type: Expansion I/O
• Compatible Controller Series: FX-PC Series

Standard Information

• Brand: JOHNSON CONTROLS
• Manufacturer Part Number: fx-pcx3731-0