RH101AA FOXBORO Intrinsically safe I/O base

Description

FOXBORO RH101AA Compact 200 Series 16-Slot Horizontal Baseplate: Introduction and Technical Specifications
Brand and Model Information
The RH101AA is a Compact 200 Series 16-slot horizontal baseplate manufactured by FOXBORO (now part of Schneider Electric), a global leader in industrial automation and control systems solutions. This passive backplane module is a critical component of the Foxboro Evo™ and I/A Series® distributed control systems (DCS), serving as the foundation for mounting and connecting Compact 200 Series Fieldbus Modules (FBMs) with their associated field signal terminations. The official part number is RH101AA, specifically designated for the 16-slot horizontal configuration in the Compact 200 Series I/O subsystem.
Physical and Environmental Specifications
The FOXBORO RH101AA features a robust, industrial-grade design with dimensions of approximately 483 mm × 178 mm × 51 mm (19″ × 7″ × 2″) and a net weight of 2.3 kg (5.1 lbs). It is designed for horizontal mounting only and is constructed to withstand harsh industrial environments with an operating temperature range of -40°C to +70°C (-40°F to +158°F) and a storage temperature range of -40°C to +85°C (-40°F to +185°F). The module can operate in relative humidity conditions of 5% to 95% (non-condensing) and at altitudes from -300 m to +12,000 m (-1,000 ft to +40,000 ft). It meets ISA Standard S71.04 Class G3 (Harsh) contamination resistance requirements when not enclosure-mounted. The baseplate has an IP20 protection rating, suitable for standard control cabinet installations.

Power and Communication Specifications
The RH101AA is equipped with redundant power rails to support dual 24V DC power inputs for enhanced system reliability, ensuring continuous operation even if one power source fails. It also features redundant communications channels built into the passive backplane, supporting connections to the 2 Mbps Module Fieldbus for high-speed data transfer between FBMs and the control processor. The baseplate does not consume power itself but provides power distribution to the installed FBMs. Each Compact 200 Series FBM connected to the baseplate typically has a power consumption of 2-8 watts depending on the module type. The baseplate includes a baseplate identification DIP switch for hardwired addressing in the system configuration.
Core Features and Functionalities
The FOXBORO RH101AA offers several key features that make it an essential component in industrial automation systems. It provides 16 positions for mounting Compact 200 Series FBMs, supporting both simplex and redundant module configurations to meet varying reliability requirements. The passive backplane design eliminates active components, reducing potential failure points and increasing overall system uptime. Redundant power and communication channels are integrated into the baseplate architecture, providing built-in fault tolerance for mission-critical applications. The module supports hot-swapping of FBMs, allowing for convenient maintenance and replacement without system shutdown. It is fully compatible with existing I/A Series systems with 200 Series I/O equipment and/or legacy 100 Series I/O equipment, ensuring seamless integration into both new and upgrade projects. The baseplate also features LED status indicators for power and communication status monitoring, simplifying troubleshooting and diagnostics.
Application Areas
The RH101AA is primarily used in process control and industrial automation applications as part of Foxboro’s distributed control systems (DCS). It is ideal for power generation, oil and gas, chemical processing, pharmaceutical manufacturing, food and beverage production, and water/wastewater treatment facilities where reliable and scalable I/O solutions are required. The baseplate enables distributed I/O architecture, reducing field cabling and associated installation costs by allowing control electronics to be placed closer to field sensors and actuators. Its high reliability and redundant capabilities make it particularly well-suited for mission-critical systems requiring continuous operation and minimal downtime. The module is also compatible with a wide range of Compact 200 Series FBMs, including analog input/output, digital input/output, thermocouple/RTD, HART communication, and specialty modules, providing flexibility to meet diverse application requirements.

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