Foxboro RH928CA PLC Processor Module I/A Series

Product Description

The Foxboro RH928CA is a rail-mounted control processor engineered for integration into Foxboro I/A Series Distributed Control Systems. Installed on a modular baseplate, it operates as the primary processing unit responsible for executing control logic, managing I/O data exchange, and coordinating communication across field networks.

This module is designed for deterministic, real-time operation in industrial environments. It supports both analog and discrete signal handling through compatible I/O modules and Foxboro FBM subsystems. Its hardware architecture allows deployment in either standalone or redundant configurations, enabling high system availability where required.

The RH928CA shares a common mounting and integration platform with other RH928-series modules, ensuring consistency in system design and ease of expansion.

Technical Specifications

General Information

• Model: RH928CA

• Module Type: Rail-mounted control processor

• Platform: Foxboro I/A Series DCS

• Installation: DIN rail or Foxboro modular baseplate

Processing & Memory

• Processor Type: Industrial embedded CPU

• Configuration: Single processor (dual optional for redundancy)

• Memory:

• 16 MB SDRAM

• 32 MB Flash

Power Requirements

• Supply Voltage: 24 VDC nominal

• Redundant Input: Supported

• Power Consumption: ≤ 8.5 W

I/O Integration

• Compatible with Foxboro FBM (Fieldbus Modules)

• Supports:

• Analog inputs (voltage, current, RTD, thermocouple)

• Discrete I/O signals

• System Role: Central controller for distributed I/O architecture

Communication Interfaces

• Ethernet (primary network communication)

• RS-485 serial interface

• Protocol Support: Modbus TCP/IP

Environmental Ratings

• Operating Temperature: 0 °C to +60 °C

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

• Environmental Design: Industrial-grade for continuous operation

• Compliance: CE, RoHS, IEC 61131-2

Mechanical Details

• Mounting System: Foxboro rail-mounted modular baseplate

• Dimensions:120 × 25 × 10 mm (typical installed footprint)

• Weight: 0.84 kg

• Enclosure: Reinforced industrial housing

Key Features

• Real-time control processor for distributed automation systems

• Supports both analog and discrete signal processing

• Redundant configuration capability for high availability

• Standardized mounting across RH928 module family

• Reliable performance in industrial operating conditions

• Scalable architecture for system expansion

Application Scenarios

• Process automation in oil & gas facilities

• Chemical and pharmaceutical production systems

• Power generation and utility control

• Distributed manufacturing and plant automation

• Integrated control systems requiring modular scalability

FAQ

Q: Can the RH928CA operate in redundant mode?
A: Yes. It supports dual-processor configurations for fault-tolerant system design.

Q: What types of I/O signals are supported?
A: The module works with both analog and discrete signals through compatible Foxboro FBM modules.

Q: Is it compatible with other RH928 series modules?
A: Yes. It is designed to share the same modular baseplate system with other RH928 series components.