Description
Key Technical Specifications
- Model Number: P0922YU / FPS400-24
- Manufacturer: Foxboro (Invensys)
- Series: I/A Series Distributed Control System
- Product Type: DIN Rail Mounted Power Supply Module
- Power Rating: 400 Watts
- Output Voltage: 24 VDC (Transformer Isolated)
- Input Voltage: 120/240 VAC or 125 VDC
- Protection Features: Dual-Stage Current Limiting, Over-Voltage Shutdown
- Compliance: Zone 2 / Division 2 Hazardous Location Rated
- Certifications: UL, UL-C, CENELEC, G3 Harsh Environment Rating
Functional Role & Application Analysis
The P0922YU (commercially known as the FPS400-24) is the dedicated power supply module for the Foxboro I/A Series Fieldbus Modules (FBMs). It converts incoming AC or high-voltage DC into a clean, isolated 24 VDC output to power the FBM and its connected field instrumentation.
In process control, power integrity dictates system uptime. The P0922YU solves this by providing 400W of regulated power with built-in dual-stage current limiting and over-voltage shutdown circuits. This protects the expensive FBM cards and field devices from catastrophic electrical faults. It is the only power supply officially tested and qualified to operate with the 200-series FBMs, making it a mandatory component in any Foxboro I/A rack.
- FBM Power Distribution: Provides isolated 24 VDC to Foxboro 200-series Fieldbus Modules and external field devices.
- Hazardous Area Compliance: Rated for Zone 2 / Division 2 environments, allowing installation in classified areas without additional barriers.
- Preventive Maintenance: Replaced during plant turnarounds to prevent capacitor aging and voltage ripple that causes intermittent FBM faults.
- Legacy System Support: Maintains operation for aging I/A Series installations where OEM spares are scarce.
Our Quality Standard & Testing Process
We understand that the cost of an unreliable power supply is far greater than its purchase price. A failing PSU causes cascading FBM failures and field device misbehavior. We have established a rigorous, multi-stage testing process to ensure every P0922YU we ship is 100% functional.
- Visual & Component Inspection: Technicians inspect the PCB for burnt components, leaking capacitors, and cold solder joints. We verify the DIN rail clips and terminal blocks are undamaged.
- Live System Test: The module is installed in a live Foxboro I/A Series test rack. We measure the 24 VDC output under full 400W load for 24 hours to verify voltage stability and thermal performance.
- Full-Function Diagnostics: We test the dual-stage current limiting by applying a controlled overload. We verify the over-voltage shutdown circuit triggers at the correct threshold and that the relay alarm output functions properly.
- Warranty Backing: Only units passing all tests are shipped. Each P0922YU includes a 12-month warranty against functional failure.
FOXBORO P0922YU-FPS400-24
Compatibility & Migration Paths
To ensure this P0922YU is 100% compatible with your system, you must verify these key points. Power supply input voltage variants are the most common ordering mistake.
- Input Voltage Variant: The is the 120/240 VAC or 125 VDC input version. There is also a P0922YC variant for 24 VDC input. You must confirm your incoming power matches the specification.
- FBM Compatibility: This power supply is specifically tested and qualified for use with Foxboro 200-series FBMs. Verify your FBM model numbers match the supported list.
- Replacement & Alternatives: The is a direct drop-in replacement for existing FPS400-24 units. No configuration changes are required. Simply disconnect field wiring, unseat the old module, and install the new one.
- Get Expert Help: Unsure about your input voltage or FBM compatibility? Contact our technical team today for a free compatibility check. Send a photo of your existing power supply nameplate for instant verification.
