Overview
The Yokogawa NFPW426-50, also cataloged as the NFPW426 Power Supply Module, operates as a dedicated hardware component for supplying DC power within Yokogawa FCN-RTU and STARDOM controller systems. The module accepts 12 V DC or 24 V DC industrial power inputs and supports continuous operation across a -40 to +70 deg C temperature range. Its fanless enclosure uses natural convection and incorporates overcurrent, overvoltage, and short-circuit protection functions.
Suffix Breakdown & Model Matrix
The supplied product information identifies NFPW426-50 as a standard non-explosion-protected version of the NFPW426 power supply module.
| Model | Description |
|---|---|
| NFPW426 | Base power supply module model |
| NFPW426-50 | Standard non-explosion-protected version |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFPW426-50 |
| Base Model | NFPW426 |
| Brand | Yokogawa |
| Product Type | Power Supply Module |
| Compatibility | Yokogawa FCN-RTU / STARDOM controller systems |
| Input Voltage | 12 V DC / 24 V DC |
| Operating Temp | -40 to +70 deg C |
| Cooling Method | Natural convection |
| Protection Features | Overcurrent, overvoltage, and short-circuit protection |
| Explosion Protection | Standard non-explosion-protected type |
Process Control System Integration
Within Yokogawa process control architectures, the NFPW426-50 supports the electrical power infrastructure required by FCN-RTU and STARDOM hardware. The module operates independently of 4-20 mA HART loop processing and does not function as a field signal interface.
However, stable module-level power distribution supports controller and I/O hardware that may process industrial instrumentation signals. Therefore, installation should maintain separation between power conductors and low-level analog or communication wiring to reduce electrical interference.
Frequently Asked Questions
Q: Can the NFPW426-50 operate from both 12 V DC and 24 V DC power sources?
A: According to the supplied specifications, the module supports 12 V DC and 24 V DC industrial power inputs.
Q: Does the NFPW426-50 use forced-air cooling?
A: No. The supplied information specifies natural convection cooling. The installation location should therefore provide adequate airflow around the module.
Q: Does the supplied data confirm hot-swap operation?
A: No hot-swap capability is specified in the supplied technical information. Do not assume live insertion or removal capability without confirmation from the applicable Yokogawa system documentation.
Field Installation Guidelines
Install the NFPW426-50 in accordance with the applicable Yokogawa FCN-RTU or STARDOM hardware arrangement and system documentation.
- Verify the external power source before connecting the module.
- Confirm compatibility with the available 12 V DC or 24 V DC supply configuration.
- Disconnect or isolate power before installation or removal unless the system documentation explicitly permits live maintenance.
- Provide sufficient clearance for natural convection cooling.
- Route power wiring separately from low-level analog, communication, and instrumentation cables where practical.
- Apply the system grounding method specified for the associated controller enclosure.
- Verify terminal connections and protective grounding before energizing the system.
- Inspect the module and surrounding wiring after installation for mechanical stress or loose connections.
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