The FOXBORO RH928AW stands as a critical component in Foxboro I/A Series distributed control systems (DCS), functioning as a high-performance relay output module that bridges control logic with field devices. As a key industrial automation spare part, it converts low-voltage control signals into robust switching actions, activating valves, motors, and alarms in demanding industrial settings.
Designed to integrate seamlessly with Foxboro’s I/O subsystems, the FOXBORO RH928AW plays a vital role in regulating processes where precision and reliability are non-negotiable. Engineers typically mount the module in control cabinets alongside I/A Series FBM (Field Bus Module) interfaces, ensuring close coordination between the DCS and field equipment. For example, in a natural gas processing plant, the FOXBORO RH928AW controls emergency shutdown valves, activating them within milliseconds when pressure sensors detect anomalies—preventing potential safety hazards and costly leaks.
The FOXBORO RH928AW combines rugged construction with intelligent design to excel in industrial control. Its 8 independent relay channels support versatile configurations, allowing control of multiple devices—from small solenoid valves to larger motor starters—without cross-interference. This modularity reduces the need for additional hardware, streamlining cabinet layouts in space-constrained facilities.
Built-in diagnostics set the FOXBORO RH928AW apart: individual channel LEDs illuminate to confirm activation, while a central fault LED alerts technicians to wiring issues or overloads. In a wastewater treatment plant, this feature recently helped maintenance teams isolate a stuck valve within minutes, whereas legacy modules required hours of troubleshooting.
Integration with Foxboro I/A Series DCS is plug-and-play, with backplane communication eliminating complex wiring between the module and controller. Unlike generic relay modules that require external signal conditioning, the FOXBORO RH928AW accepts direct inputs from I/A Series processors, reducing latency and improving response times—critical for time-sensitive processes like chemical batch mixing.
The FOXBORO RH928AW thrives across industries requiring precise actuation control. In power generation, it regulates boiler feedwater valves, adjusting flow rates to maintain optimal steam pressure. Oil refineries rely on it to control pump stations, ensuring consistent flow through distillation columns even during voltage fluctuations.
Water treatment facilities use the FOXBORO RH928AW to operate filtration system valves, withstanding the humid environments that degrade lesser modules. A recent retrofit at a municipal water plant replaced outdated electromechanical relays with FOXBORO RH928AW units, reducing unplanned downtime related to valve failures by 45% over six months. Its ability to handle inductive loads also makes it ideal for controlling motor-driven equipment in mining and mineral processing.
- FOXBORO RH928AX – Higher-current variant (10A) of the FOXBORO RH928AW for heavy-duty motor control.
- FOXBORO RH928AE – Ethernet-enabled relay module for remote monitoring, compatible with I/A Series DCS.
- FOXBORO FBM201 – Companion analog input module, providing sensor data to the FOXBORO RH928AW for closed-loop control.
- FOXBORO RH928AV – Safety-rated relay module (SIL 2) for critical shutdown systems in petrochemical plants.
- FOXBORO RH928AL – Low-power variant optimized for battery-backed remote telemetry units (RTUs).
- FOXBORO 2AI-A – Analog input module, pairs with the FOXBORO RH928AW in temperature control loops.
- FOXBORO 4AO-E – Quad analog output module, complementary to the FOXBORO RH928AW for variable speed drive control.
Installing the FOXBORO RH928AW requires a 35mm DIN rail in a clean, ventilated control cabinet with ambient temperatures below 60°C. Ensure proper grounding via the module’s earth terminal to minimize electrical noise, especially near variable frequency drives. Wire output connections to the relay terminals using 14–22 AWG conductors, torquing screws to 0.5 N·m for secure contact.
For maintenance, monthly visual checks of status LEDs confirm operational health. Inspect relay contacts annually for signs of arcing or corrosion, particularly in high-cycle applications like packaging lines. Replace the FOXBORO RH928AW every 8–10 years or after 100,000 operations, whichever comes first, to prevent contact wear. Store spare modules in anti-static packaging to protect internal electronics during storage.
The FOXBORO RH928AW is backed by a one-year warranty and free replacement service provided exclusively by Xiamen Xiongba E-commerce Co., Ltd. Branch, not the original equipment manufacturer. Customers can initiate warranty claims via email or phone, with Xiongba’s technical team verifying authenticity through serial-number traceability. Pre-shipment testing includes relay contact resistance checks and functional verification to ensure compliance with Foxboro’s specifications.
Xiamen Xiongba E-commerce Co., Ltd. Branch specializes in industrial automation distribution and global procurement. We provide a one-year warranty and free replacement service, sourcing DCS, PLC, MVME modules, Anybus converters, RTU modules, industrial PCs, low-frequency displays, and SCSI HMIs to solve procurement challenges with competitive pricing.
Contact Xiamen Xiongba today for pre-shipment testing, datasheet verification, and serial-number traceability of your FOXBORO RH928AW module, with fast global delivery to keep your industrial control systems operating reliably.
