Product Description

The NFPW444 is a high-reliability DC power supply module for Yokogawa STARDOM FCN-RTU and FCN-500 controllers. It converts 24 V DC input into a precise 5.1 V DC logic output for the system backplane. A secondary 24 V DC output is provided for analog field interface circuits and connected field devices. The module supports hot-swappable dual-redundant configurations, ensuring the controller remains operational even during maintenance or module replacement.

Technical Specifications

Core Functionality & Protection

• Provides high-availability DC power for CPU and I/O backplanes.

• Secondary 24 V DC output reduces the need for external field power distribution blocks.

• Fanless design eliminates mechanical wear components, increasing MTBF.

• Includes RAS (Reliability, Availability, Serviceability) features: internal diagnostics, temperature monitoring, and CPU communication.

Technical FAQ

Q: What do the suffix codes mean for the NFPW444?

• -5: Standard type (No explosion protection)

• -E: Explosion protection type

• -0: Basic version

• -1: ISA Standard G3 conformal coating for corrosive environments

Q: Is this module compatible with all STARDOM base units?

• Primarily designed for NFBU200 (Long type) to support redundancy.

• Compatible with NFBU050 (Short type) for single-power applications.