FOXBORO P0916VL

Description

Product Description

The FOXBORO P0916VL is a specialized power supply module for the Foxboro I/A Series distributed control system (DCS). This module is a critical component within a fieldbus or nodebus assembly, responsible for converting the incoming AC mains power into the stable, isolated, and well-regulated DC voltages required to power all other electronic modules in the assembly, including processors, communication cards, and I/O modules. As the primary power source for its local control node, the reliable operation of the entire assembly is fundamentally dependent on the consistent and clean output of the FOXBORO P0916VL. Engineered for industrial durability, this module incorporates protection against input transients, overloads, and short circuits to ensure continuous operation in demanding process environments such as refineries, chemical plants, and power generation facilities. The design prioritizes high efficiency and thermal management to maximize system uptime. Selecting and installing the correct FOXBORO P0916VL is a foundational step in building a reliable I/A Series control station.

Product Parameters

• System Family: Foxboro I/A Series DCS.
• Module Type: Power Supply Module for Fieldbus/Nodebus Assembly.
• Input Voltage: Typically 120/240V AC, 50/60 Hz.
• Output Voltages: Provides the standard DC voltage rails required by the I/A Series backplane, typically +5V DC and ±12V DC or +24V DC.
• Output Power: Rated for a specific wattage (likely in the range of 90-120W) to power a fully populated assembly.
• Efficiency: High switching efficiency to minimize heat generation.
• Protections: Includes overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.
• Status Indicators: LED indicators for AC Power On and DC Power OK.
• Mounting: Designed to mount within a dedicated slot in an I/A Series fieldbus or nodebus assembly enclosure.
• Cooling: May include an integral cooling fan or rely on convection.

Advantages and Features

• System-Optimized Design: Specifically engineered to meet the electrical and mechanical requirements of the Foxboro I/A Series, guaranteeing compatibility and reliable performance within that ecosystem.
• High Reliability & MTBF: Built with high-quality industrial components for continuous operation, resulting in a high Mean Time Between Failures (MTBF), critical for process availability.
• Compact and Efficient: Provides substantial power in a compact form factor that fits seamlessly into the I/A Series assembly, optimizing control panel space.
• Robust Protective Circuits: Integrated protections prevent damage to the power supply itself and, more importantly, safeguard the expensive connected DCS modules from electrical faults.
• Seamless Integration: Fully recognized and supported within the Foxboro I/A Series control software, allowing for potential system-level monitoring of power health.

Application Cases in Application Fields

• Oil Refining: Powers a nodebus assembly in a control rack managing a distillation column or reactor feed system.
• Chemical Processing: Supplies power to a fieldbus assembly controlling a batch reactor sequence, including analog loops and discrete outputs.
• Power Plant (Balance of Plant): Provides reliable power to an I/A Series node managing auxiliary systems like water treatment or fuel handling.
• Pharmaceutical Manufacturing: Ensures clean, stable power for precise control loops in a process skid controlled by an I/A Series system.

Comparisons with Competing Products

• Vs. Emerson DeltaV Power Supply (for Electronic Marshalling): Since Foxboro is part of Emerson, this is an internal comparison. The FOXBORO P0916VL is for the legacy I/A Series platform, while newer DeltaV systems use different, modern power supply designs. They are not interchangeable.
• Vs. ABB S800 Power Supply (e.g., PPEA121): Both serve as power supplies for their respective DCS I/O systems. Key differences are in form factor, connection to the backplane, output voltage specifications, and integration with their proprietary control architectures.
• Vs. Generic 24V DC Industrial Power Supply: A generic supply may provide a similar voltage but lacks the specific multiple voltage rails required by the I/A Series backplane, the direct mechanical mounting, and the guaranteed compatibility and support.

Selection Suggestions and Precautions

1. Accurate Assembly Power Budget: Before selecting the FOXBORO P0916VL, calculate the total power consumption of all modules in the assembly. The power supply’s rated output must exceed this total with a significant safety margin (typically 20-30%).
2. Input Voltage Verification: Confirm the available AC supply voltage matches the input specifications. Ensure any voltage selection switches are correctly set before applying power.
3. Thermal Management and Ventilation: Ensure the assembly enclosure has adequate ventilation. Do not block air vents. In high ambient temperatures, consider derating the power supply’s maximum output.
4. Use as a Critical Spare: For continuous process applications, having a tested spare FOXBORO P0916VL module is prudent to minimize downtime in the event of a failure.
5. Legacy System Awareness: The I/A Series is a mature platform. For new projects, Emerson typically recommends the modern DeltaV system. The FOXBORO P0916VL should be sourced specifically for maintaining or extending existing I/A Series installations.

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