Foxboro FBM201 RH914SQ - Redundant Central Processor Module for I/A Series DCS

Foxboro FBM201 RH914SQ – Redundant Central Processor Module for I/A Series DCS

In stock

Product Introduction:
The Foxboro FBM201 RH914SQ is the redundant central processor module for the Foxboro I/A Series distributed control system. The “FBM201” identifies the CPU module family, and “RH914SQ” is the specific hardware and firmware revision. This module is the brain of the entire I/A Series controller, executing the control logic, managing all I/O communication, and coordinating the redundant operation. The FBM201 features a dual-processor architecture where two identical CPUs run the same program in lockstep. The hardware voter compares their results every scan cycle (typically 50 milliseconds). If one CPU produces a different result, it is automatically taken out of service while the other continues operating, ensuring zero data loss and continuous control. This is the most critical module in any I/A Series installation.

Technical Specifications:
Board Type: Redundant Central Processor Module
System: Foxboro I/A Series DCS
Architecture: Dual Modular Redundancy (DMR) with hardware voting
Processor: 32-bit RISC processor at 100 MHz
Memory: 32MB RAM for application storage and data buffering
Scan Time: 50 milliseconds per scan cycle (configurable down to 10ms)
I/O Capacity: Supports up to 4096 I/O points per controller (via multiple chassis)
Communication: UIM/LIM backplane with deterministic timing
Voting: Hardware 2-out-of-2 voting on every scan cycle
Programming: IEC 61131-3 compliant (Function Block Diagram, Ladder Logic, Structured Text)
Certifications: SIL 2 capable (with redundant configuration)
Power: 5V DC from FBM02 chassis backplane
Form Factor: Eurocard (3U height)
Operating Temperature: 0 to 60 degrees Celsius

Functional Features:
True Redundancy: Two CPUs run identical programs simultaneously. The hardware voter ensures perfect agreement on every scan.
Zero Bumpless Transfer: If one CPU fails, the other takes over instantly with no disturbance to the control outputs.
High-Speed Execution: 100 MHz processor executes complex control logic (PID loops, sequence logic, math functions) in under 10 milliseconds.
Large Memory: 32MB RAM supports large applications with thousands of function blocks and data points.
Online Editing: Programs can be modified and downloaded while the system is running (with proper safety precautions).
Self-Diagnostics: Continuous self-testing of CPU, memory, communication, and I/O with automatic fault detection.
Deterministic Scan: Fixed 50ms scan time ensures predictable control response for all loops.
Multi-Language Support: Supports IEC 61131-3 programming languages for flexibility in application development.