1. Foxboro RH928AW | Genuine Termination Assembly, Limited Stock Available

Product Core Brief

• Model: RH928AW
• Brand: Foxboro (Schneider Electric / Invensys)
• Series: I/A Series DCS System
• Core Function: Termination baseplate, provides wiring interface between FBM field modules and field instruments
• Type: I/O Termination Baseplate
• Key Specs: Matches designated FBM modules | Screw terminal wiring | Backplane interconnection
• Condition: New Surplus, non-refurbished

  ⚠️ This component is officially discontinued, only available via existing inventory.

Key Technical Specifications

Product Introduction

Application Scenarios & Pain Points

1. Oil & Gas Refineries – Process Control Cabinets

   Used for signal termination of reactor and distillation column control loops. Stable wiring is critical for continuous refining operations.

2. Thermal Power Plants – Boiler & Turbine Auxiliary Control

   Connect temperature transmitters, vibration sensors and solenoid valves for boiler auxiliary monitoring systems.

3. Chemical Plants – Continuous Production Line DCS

   Supports analog and discrete signal wiring for reaction vessel automatic control.

4. Water Treatment – Municipal Plant SCADA Cabinets

   Field termination for flow, pH and level measurement instruments.

5. Pulp & Paper Industry – Papermaking Process Control

   Adapt to workshop vibration and humidity environments, prevent loose terminal faults.

Compatibility & Replacement Matrix

Critical Replacement Warnings

1. Different RH928 series variants have inconsistent pin definitions. Photograph all field wiring before removing the old baseplate.
2. Confirm matched FBM module model; RH928AW only works with FBM224. Mismatched combinations lead to signal failure.
3. Cut off all field power and rack power before disassembly to avoid short-circuit damage.
4. Apply ESD protection during handling; static discharge may damage adjacent FBM circuit boards.

Quality Control Process

1. Incoming Inspection

   Verify part number labels, serial traceability and physical condition. Check for terminal corrosion, scratches or disassembly traces.

2. ESD Control

   All testing and storage operations are performed on anti-static workbenches with anti-static wristbands.

3. Bench Functional Test

   Match RH928AW with FBM224 test module, complete continuity test for every terminal channel. Conduct 24-hour continuous aging test.

4. Electrical Parameter Testing

   Check terminal contact stability, confirm no internal short circuit between signal channels.

5. Final QC & Packaging

   Generate test report, seal component with anti-static bag, wrap with bubble film. Attach QC passed label before shipment. Test photos and videos can be provided upon client request.

Module Replacement Pitfall Guide

1. Confuse RH928 series different suffix models

   Risk: Install wrong baseplate, all field signals cannot be read normally.

   Advice: Confirm full part number printed on housing. Do not rely only on the RH928 prefix.

   Real case: A maintenance engineer mistakenly installed RH928BW instead of RH928AW. It took nearly one shift to locate the wiring mismatch fault.

2. Skip wiring recording before disassembly

   Risk: Wrong wiring after replacement causes sensor signal reversal or open circuit.

   Advice: Take clear photos of every terminal wiring layout. Do not rely on memory.

3. Ignore terminal screw torque requirements

   Risk: Loose terminals create intermittent signal drift, hard to reproduce during troubleshooting.

   Advice: Tighten terminals according to Foxboro official torque specification after wiring.

4. Neglect ESD protection

   Risk: Static electricity damages adjacent FBM module circuits during replacement.

   Advice: Wear anti-static wristbands when operating inside DCS cabinets, especially in dry seasons.

5. Misjudge fault source

   Risk: Blindly replace baseplate without checking field cables and sensors.

   Advice: Carry out signal loop testing first to confirm the fault originates from the termination base.