Overview
Yokogawa NFPW441-50 is a dedicated field power supply module engineered for Yokogawa’s FIO (Field I/O) platform. It provides regulated 24 V DC power to analog and digital I/O modules mounted on the same FIO baseplate. The module is designed for deployment in CENTUM VP distributed control systems and ProSafe-RS safety instrumented systems, where long-term operational stability and power integrity are essential.
The “-50” option code identifies a specific hardware configuration within the NFPW441 product family, corresponding to defined electrical characteristics, compliance requirements, and manufacturing revisions.
Key Functional Characteristics
The module is optimized for field-side power distribution, separating I/O supply power from system logic power to minimize electrical noise and interference. This design improves signal integrity and system robustness in electrically demanding industrial environments.
When installed in a redundant FIO baseplate configuration, NFPW441-50 can operate in parallel with a second module. In the event of a single power supply failure, the remaining unit continues supplying field power without interrupting I/O operation.
Electrical and Functional Specifications
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Model: NFPW441-50
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Module Type: FIO Field Power Supply Module
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Input Voltage: 24 V DC nominal
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Output Voltage: Regulated 24 V DC for field I/O
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Load Capacity: Designed to support a fully populated FIO baseplate (dependent on installed I/O module types)
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Protection Functions:
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Overcurrent protection
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Output short-circuit protection
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Thermal shutdown protection
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Electrical Isolation: Galvanic isolation between input and output circuits to suppress ground loops and noise coupling
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Redundancy Support: Dual-module redundant operation supported
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System Compatibility: CENTUM VP, ProSafe-RS (FIO architecture)
Environmental and Reliability Ratings
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Operating Temperature: 0 °C to 55 °C
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Storage Temperature: −40 °C to 70 °C
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Relative Humidity: 5–95% RH, non-condensing
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EMC Performance: Designed to meet industrial immunity and surge resistance requirements
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Reliability Objective: Continuous operation under industrial control conditions
Mechanical and Installation Details
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Mounting Method: Plug-in installation into Yokogawa FIO baseplate power slot
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Cooling Method: Natural convection cooling
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Hot-Swap Capability: Supported in redundant power configurations
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Construction: Industrial-grade electronic components with reinforced enclosure for control cabinet use
Typical Application Areas
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Field I/O power distribution in oil and gas processing facilities
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Chemical and petrochemical process control systems
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Power generation and utility automation systems
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Safety instrumented systems requiring isolated and redundant I/O power supplies
Related Model Comparison
Within the Yokogawa FIO power module lineup, the NFPW441 series is dedicated to supplying 24 V DC field power. Compared with system or controller power modules, NFPW441-50 focuses specifically on I/O load stability and electrical isolation, making it suitable for high-noise environments and safety-related applications.
FAQ
Can the module operate without a redundant partner?
Yes. NFPW441-50 supports standalone operation. However, redundant configuration is recommended for critical control and safety systems.
Is the output power rating fixed?
The available output capacity depends on the number and type of installed FIO I/O modules. Engineering verification is recommended during system design.
Is this module approved for ProSafe-RS systems?
Yes. The module is a standard Yokogawa FIO component and is fully compatible with both CENTUM VP and ProSafe-RS architectures.
