Product Core Brief

• Model: FBM218 (Associated Part: P0917XV)
• Brand: FOXBORO (Invensys / Schneider Electric)
• Series: I/A Series / Compact 200 Series DCS
• Core Function: Provides 8 channels of redundant analog outputs with HART digital communication overlay for field devices.
• Product Type: HART Redundant Output Interface Module
• Key Specs: 8 Channels | 4-20mA + HART FSK | FBM-Level Redundancy | Hot-Swappable
• Condition: New Original / New Surplus

FOXBORO FBM218

Product Introduction

FOXBORO is a high-reliability HART communication redundant output interface module designed for the I/A Series distributed control system. It serves as a critical interface for driving final control elements while maintaining continuous digital communication with smart field devices.

This industrial automation unit features 8 isolated output channels, each capable of providing a standard 4-20mA analog signal or a digital HART Frequency Shift Keying (FSK) signal superimposed on the analog output. Designed for mission-critical applications, two modules can be paired to provide FBM-level redundancy, ensuring uninterrupted process control even in the event of a module failure.

Key Technical Specifications

Quality Control Process

We validate every FOXBORO before shipment to ensure operational readiness:

1. Visual & Physical Inspection: Backplane connectors, terminal assembly points, and front-panel LEDs are checked for pin straightness, corrosion, or mechanical stress.
2. Functional Test: Modules are powered up in a test rack to verify LED status indicators, Master/Tracker states, and backplane communication handshake.
3. Signal Verification: Each of the 8 channels is stimulated to confirm accurate 4-20mA output generation, and dedicated FSK modems are tested for proper bidirectional HART communication.
4. Cleaning & Packaging: Units are cleaned, anti-static shielded, and desiccant-packed to prevent moisture damage during transit.

Replacement Pitfall Guide

❗ Redundancy Pairing Rules: To achieve FBM-level redundancy, two modules must be installed in adjacent slots on the baseplate, with the Master module located in an odd-numbered position (e.g., slots 3 and 4). A redundant adapter must be used to combine the outputs.

❗ Fail-Safe Configuration: If a fault is detected in one module of a redundant pair, its output will be driven to 0 mA, and the good module will automatically take over the current loop. Ensure your DCS fail-safe action (Hold/Fail) and fallback data options are configured correctly to prevent unintended process trips.

❗ HART Communication Limits: While the module supports HART universal and common practice commands, it does not support burst communication mode. Ensure your field devices are configured for polled mode.

❗ Hot-Swap Procedure: The is fully hot-swappable without removing field termination cables, power, or communication cables. However, always verify the Tracker module is actively synchronizing before removing a faulty Master module to ensure seamless failover.

FOXBORO FBM218

Compatibility Matrix & Benchmarks

• Lead Time: Typically 1-3 weeks for surplus stock; 4-8 weeks for new factory orders.
• Warranty: Standard 12-month functional warranty.