Product Overview

The Foxboro RH924WA (Field Control Processor 280) functions as a high-velocity distributed control engine for the Foxboro Evo and I/A Series DCS. This 100% Brand New original module utilizes an advanced ARM® System on a Chip (SOC) to execute intensive regulatory, logic, and sequential control strategies. By integrating a 100 Mbps fiber optic interface, the RH924WA delivers triple the performance and double the capacity of previous generation FCP270 modules. It serves as the primary intelligence for critical infrastructure in petrochemical, power generation, and mining sectors, ensuring deterministic control and secure data acquisition in high-demand industrial environments.

Technical Specifications

Engineering Advantages

• ARM® SOC Efficiency: The ARM-based System on a Chip integrates the processor, memory management, and communication interfaces into a single silicon die. This reduces internal latency and power consumption while providing the raw computational speed required for sub-millisecond PID loop updates.

• ISA EDSA Certified Security: The RH924WA incorporates hardware-level cybersecurity features. It carries ISA EDSA certification, ensuring the control network remains resilient against unauthorized access while supporting secure Online Image Upgrades (OLUG) to maintain system patches without process interruption.

• Quad-Channel HDLC Fieldbus: The processor manages four independent HDLC fieldbus channels. This architecture allows the FCP280 to communicate with up to 64 FBMs simultaneously, significantly increasing the I/O density per rack and reducing the hardware footprint in the control room.

• Deterministic Failover Redundancy: When deployed in a dual-processor configuration, the RH924WA maintains perfect synchronization between primary and standby units. If a hardware fault occurs, the standby module assumes control without missing a single scan cycle, guaranteeing nonstop operation for safety-critical loops.

• High-Capacity Block Memory: With a dedicated 15.75 MB allocation for control blocks, the RH924WA executes larger, more sophisticated control schemes than the FCP270. This capacity allows engineers to consolidate complex interlocks and sequences into a single processor node.

FAQs

• Does the RH924WA support hot-swapping?

  Yes. You can replace a single RH924WA module in a redundant pair while the system is live. The remaining processor maintains all control functions and automatically synchronizes with the new module upon insertion.

• What is the benefit of the 128 MB Flash memory?

  The flash memory stores the entire operating system and user-defined control database. Because it is non-volatile, the FCP280 recovers instantly from a total power failure without requiring a download from the host workstation.

• Is the fiber optic network adapter built-in?

  The RH924WA features integrated fiber optic ports for 100 Mbps Ethernet communication. This provides total electrical isolation from the control network, protecting the CPU from surges and ground loops common in industrial power grids.