Product Description

The RH926SP (RH926SP), encompassing the FBM215 and FBM218 series, is a high-performance HART communication output interface for the Foxboro EcoStruxure and I/A Series DCS. This module provides eight galvanically isolated analog output channels capable of driving field actuators while simultaneously enabling bi-directional digital HART communication. By superimposing HART FSK signals on the standard 4–20 mA output, the RH926SP allows field devices to transmit diagnostic and configuration data without interrupting primary control signals.

Built for extreme reliability, the RH926SP is Class G3 (Harsh) rated, providing resistance to corrosive atmospheres, vibration, and temperature extremes. Its robust design ensures consistent operation in critical process environments, making it ideal for high-density output control and advanced predictive maintenance through HART-enabled asset management.

Technical Specifications

Application Scenarios

The RH926SP is ideal for smart valve positioners, actuators, and variable-speed drives in:

• Oil and gas processing

• Chemical and petrochemical industries

• Power generation facilities

Its HART communication capability enables diagnostic extraction and predictive maintenance, allowing operators to detect valve stiction, calibration drift, or actuator faults before they result in process interruptions.

Technical FAQ

Q: Does the RH926SP require a specific baseplate for DIN rail mounting?
A: Yes, the RH926SP seats into a Foxboro modular baseplate, which then clips onto standard 32mm or 35mm DIN rails, providing the necessary Fieldbus interface.

Q: Can this module be used in highly corrosive coastal environments?
A: Yes, the RH926SP is G3 rated, with internal components coated to resist corrosion from sulfur, chlorine, and other harsh chemicals commonly found in refineries and coastal industrial sites.