Description

The Foxboro P0926HT (also identified as RH926HT) is an 8-position modular baseplate engineered for the Foxboro I/A Series and Foxboro Evo distributed control systems. This baseplate serves as the mechanical and electrical foundation for 200 Series Fieldbus Modules (FBM). Designed for high-density control environments, it facilitates the integration of control modules while supporting both single and redundant configurations to ensure system reliability and high availability.

Features

• Supports up to eight 200 Series FBMs or Fieldbus Communication Modules (FCM).
• Passive backplane design for reliable distribution of 24 VDC redundant power.
• Facilitates 2 Mbps HDLC redundant Module Fieldbus communication.
• Hot-swappable design allows for module replacement without interrupting field wiring or adjacent operations.
• Robust mechanical guides and locking mechanisms ensure secure module seating in high-vibration industrial settings.
• Constructed from flame-retardant PC/ABS material (UL94 V0).

Applications

This baseplate is widely utilized in mission-critical industrial automation sectors, including petrochemical refining, utility power generation, and mining operations. It is specifically designed for high-density control cabinets where continuous process monitoring and rapid maintenance are required.

Technical Specifications

Installation Guidelines

• Ensure the baseplate is mounted horizontally on a standard 35 mm DIN rail.
• Verify that the power source is disconnected before installing or removing modules to prevent electrical arcing.
• Maintain proper clearance around the baseplate to ensure adequate ventilation and cooling.
• Use shielded cables for fieldbus communications to minimize EMI interference.
• Ensure all redundant power connections are securely terminated to the dedicated terminal blocks.
• Handle with care to avoid electrostatic discharge (ESD) damage to the backplane connectors.

Compliance and Certifications

The P0926HT baseplate is designed to meet rigorous industrial standards, including UL/UL-C Class I Div 2, ATEX Zone 2, and CE marking for safe operation in hazardous environments.

FAQ

Is this baseplate compatible with all 200 Series modules?

Yes, the P0926HT is designed specifically to support the Foxboro 200 Series FBM and FCM modules, providing the necessary backplane connectivity for both communication and power.

Does this unit support redundant power supplies?

Yes, the baseplate features redundant power bus distribution, allowing for dual 24 VDC power inputs to ensure continuous operation if one supply fails.