Foxboro RH928BW PLC Processor Module I/A Series

Product Description

The Foxboro RH928BW is an industrial control processor module developed for real-time automation within Foxboro I/A Series Distributed Control Systems. It operates as the central processing unit in modular architectures, executing control strategies, managing distributed I/O, and maintaining communication across multiple industrial networks.

Designed for demanding field conditions, this processor combines a robust hardware platform with flexible communication interfaces. It integrates into Foxboro modular baseplates or DIN rail installations, enabling scalable system expansion and simplified maintenance. The module supports redundancy configurations, making it suitable for high-availability control systems.

The RH928BW is particularly suited for environments where temperature extremes, vibration, and electromagnetic interference are present, ensuring consistent performance in mission-critical operations.

Technical Specifications

Processing & Memory

• CPU: Industrial embedded processor (Intel Atom class; variants include E6600 / E682J)

• Memory Configurations:

• Standard control processor: 16 MB SDRAM + 32 MB Flash

• Enhanced industrial variant: up to 512 MB RAM, 1–2 GB Flash

• Processing Capability: Real-time control and deterministic task execution

Power Requirements

• Supply Voltage: 24 VDC nominal

• Redundant Power Input: Supported

• Power Consumption: ≤ 8.5 W

Communication Interfaces

• Ethernet (primary industrial network interface)

• Serial Ports: RS-232, RS-485

• Supported Protocols:

• Modbus RTU / Modbus TCP

• Profibus DP

• DeviceNet

• CAN bus (variant-dependent)

I/O Expansion Capability

• Supports modular I/O systems

• Maximum Capacity: Up to ~512 I/O points depending on system architecture

Environmental Ratings

• Operating Temperature:

• Standard: 0 °C to +60 °C

• Extended: –40 °C to +85 °C

• Humidity: 0% to 95% RH, non-condensing

• Vibration Resistance: 5 g RMS (10–500 Hz)

• Shock Resistance: 15–30 g, 11 ms half-sine

• EMC Protection: Industrial-grade EMI/RFI shielding

Mechanical Details

• Mounting: DIN rail or Foxboro modular baseplate

• Weight: 0.4 kg

• Enclosure: Reinforced industrial housing

Key Features

• High-reliability processor for distributed control applications

• Supports redundant configurations for continuous operation

• Broad protocol compatibility for integration with diverse systems

• Scalable I/O architecture for large automation systems

• Designed for extreme industrial environments

• Seamless integration with Foxboro I/A Series infrastructure

Application Scenarios

• Power plant control systems and turbine automation

• Oil & gas production and pipeline monitoring

• Chemical and petrochemical process control

• Metallurgical and heavy industrial operations

• Distributed manufacturing and plant-wide automation

FAQ

Q: What distinguishes RH928BW from other RH928 series processors?
A: The RH928BW typically offers expanded communication protocol support and higher I/O scalability, making it suitable for more complex distributed systems.

Q: Does the module support redundancy?
A: Yes. It can be deployed in redundant processor configurations to enhance system availability.

Q: Can it be used with third-party devices?
A: Yes. With support for Modbus, Profibus, and other protocols, it can interface with a wide range of industrial equipment.