FOXBORO P0904AK

Description

Product Overview

The FOXBORO P0904AK is a high-performance, rack-mountable power supply unit designed for the Foxboro I/A Series distributed control system (DCS). This unit provides clean, regulated, and redundant power to the system’s controllers, I/O modules, and associated electronics housed in a system cabinet. The reliability of the FOXBORO P0904AK is critical for ensuring uninterrupted operation of process control applications.

Key Product Parameters

• Product Type: System Power Supply Unit

• Compatible System: Foxboro I/A Series DCS

• Input Voltage: Typically accepts a wide range of AC input (e.g., 85-264VAC, 47-63Hz) for global use.

• Output Voltage: Provides a regulated DC output, commonly +5VDC and +24VDC, for logic and field I/O power respectively.

• Output Power Rating: Designed to deliver sufficient amperage (e.g., 40A on the 5V rail, 8A on the 24V rail) to power a fully loaded cabinet.

• Redundancy: Supports N+1 redundant configuration when multiple P0904AK units are installed in parallel with an associated redundancy module.

• Mounting: Standard 19-inch rack-mount form factor.

• Cooling: Includes internal fans for forced-air cooling.

• Monitoring: Features status indicators and alarm contacts for power failure and unit fault.

Advantages and Core Features

The primary advantage of the FOXBORO P0904AK is its robust, industrial-grade design specifically engineered for the I/A Series architecture. It offers high power density, efficiency, and exceptional noise immunity to prevent electrical interference with sensitive control electronics. Its support for hot-swappable, redundant configuration is a critical feature for maintaining continuous process operation, allowing a failed unit to be replaced without system downtime. The P0904AK is built for high reliability and long service life, forming the stable power foundation upon which the control system depends.

Application Scenarios

This power supply is used in all industries employing the Foxboro I/A Series DCS to power system cabinets:

• Oil & Gas Refining: Powering controllers and I/O for crude distillation, catalytic reforming, and hydroprocessing units.

• Chemical Processing: Providing reliable power for batch and continuous process control systems.

• Power Generation: Supplying power to boiler control, turbine control, and balance-of-plant systems.

• Pharmaceutical & Biotech: Ensuring uninterrupted power for critical environmental control and batch processes.

• Water & Wastewater Treatment: Powering control systems for large-scale treatment facilities.

Comparison with Competing Products

Competing products include system power supplies from other DCS vendors like Emerson (DeltaV power supplies), Honeywell (Experion power modules), and ABB (800xA power units). The FOXBORO P0904AK is distinguished by its specific electrical and mechanical integration with the Foxboro I/A Series cabinet backplanes and redundancy systems. Compared to generic industrial power supplies, the P0904AK is validated for electromagnetic compatibility (EMC) and performance within the complete system, offering guaranteed compatibility and simplified engineering.

Selection Guide and Important Notes

Selection of the FOXBORO P0904AK is based on the power budget of the system cabinet it will support. This includes calculating the total current draw of all installed controllers, I/O packs, and communication cards.

Important Precautions:

• Power Budgeting: A thorough power calculation must be performed to ensure the P0904AK has sufficient capacity for the intended load, with appropriate headroom.

• Redundancy Configuration: For redundant (N+1) applications, a specific redundancy module (e.g., P0904HA) is required to parallel the outputs of multiple P0904AK units correctly.

• Cooling & Ventilation: The power supply requires adequate clearance and cabinet ventilation to prevent overheating. Airflow must not be obstructed.

• Input Power Source: The AC source feeding the power supply should be clean and stable, preferably from an Uninterruptible Power Supply (UPS) for critical systems.

• High Voltage: Installation and service involve exposed high-voltage terminals. Work must be performed by qualified personnel with power disconnected and locked out/tagged out.

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