Product Overview

The P0931NE (FBM231) is a high-performance Fieldbus communications interface module for the Foxboro I/A Series DCS. It provides a flexible communication bridge between the I/A Series system and third-party devices such as PLCs, motor control centers, analyzers, and packaged equipment.

Equipped with four independent, isolated serial ports, the P0931NE supports multiple electrical standards and protocols, enabling high-density integration of heterogeneous industrial equipment while minimizing cabinet footprint.

Technical Specifications

Operational Capabilities

• Protocol Versatility
  Commonly used for Modbus RTU master/slave communication, allowing the DCS to read from and write to registers in external PLCs and packaged systems.

• Redundant Architecture Support
  Can be installed in redundant pairs to maintain communication continuity with critical third-party equipment.

• Advanced Error Detection
  Hardware diagnostics continuously monitor parity, framing, and overrun errors to maintain data integrity.

• Compact System Integration
  Plugs directly into a 200 Series FBM baseplate, using the system backplane for power and high-speed communication with the control processor.

Technical FAQ

Q: Can different serial standards be used simultaneously on the four ports?
A: Yes. Each port is independently isolated and configurable, allowing mixed use of RS-232, RS-422, and RS-485 across the four ports.

Q: Does the P0931NE require a specific termination assembly?
A: Yes. A compatible Termination Assembly (TA) and cable are required. The TA selection depends on whether RS-232 or RS-422/485 wiring is used.