Description
FOXBORO P0922YU Power Supply Module
Core Product Introduction
The FOXBORO P0922YU is a high-reliability DIN-rail mounted power supply module, commercially designated as the FPS400-24. Designed specifically for the Foxboro I/A Series Distributed Control System (DCS), it provides a stable 24V DC output to power 200-series Field Bus Modules (FBMs) and other system components. Engineered for mission-critical industrial environments, this power supply ensures continuous operation and robust performance in harsh conditions, serving as the critical power backbone for process automation systems.

P0922YU
Key Technical Specifications
- Product Type: DIN-Rail Mounted Power Supply Module
- Commercial Model: FPS400-24
- Input Voltage: Wide-range AC/DC input (85-265 VAC or 108-145 VDC, nominal 125 VDC)
- Output Voltage: 24.0 VDC (±0.2 VDC nominal factory setting)
- Power Rating: 400W
- Efficiency: High efficiency (up to 92% typical at 120 VAC input)
- Protection Features: Double-level current limiting, over-voltage shut-down circuit, transformer isolation
- Environmental Rating: G3 severity level (resistant to high dust and strong electromagnetic interference)
- Certifications: UL, UL-C, and CENELEC certified for Zone 2 applications
Recommended Models in the Same Series
For different input voltage requirements or system expansions within the Foxboro FPS400-24 power supply family, consider the following models:
- P0922YC: The 24V DC input variant of the FPS400-24 power supply.
- P0926CM: Associated power supply component in the Foxboro I/A Series.

P0922YU
Related Model Cross-Reference
The following part numbers and descriptions are directly associated with the P0922YU in various supply chains and documentation:
- P0922YU (Primary model number)
- FPS400-24 (Commercial product series name)
- Foxboro I/A Series Power Supply (Product category)
Application Scenarios & Key Features
- DCS System Power Backbone: Provides stable and reliable 24V DC power to Foxboro I/A Series controllers, FBM I/O modules, and communication modules, ensuring the continuous operation of critical process control loops.
- Harsh Industrial Environments: Designed to withstand G3 level severity, making it ideal for demanding sectors like oil & gas, petrochemical, and power generation where high dust and electromagnetic interference are prevalent.
- External Field Device Power: Can be utilized to provide power to external field instruments and devices, though it is recommended to use separate power supplies for field devices and the DCS backplane to maintain system integrity.
- Redundant Power Architectures: Supports redundant power configurations to maximize system availability and prevent unplanned downtime in Safety Instrumented Systems (SIS) and critical process control applications.
Key Features:
- Wide Input Compatibility: Automatically accepts a wide range of AC or DC input voltages, accommodating global power standards and fluctuating grid conditions.
- High Reliability & Efficiency: Sealed design with high efficiency reduces heat generation and failure rates, ensuring long operational lifecycles and low total cost of ownership.
- Comprehensive Protection: Built-in double-level current limiting and over-voltage shut-down circuits safeguard connected DCS modules and field instruments from electrical faults.
- Status Monitoring: Features a relay (Form C) status alarm output to alert operators of power supply faults, enabling proactive maintenance and rapid troubleshooting.

