SPW481 | Yokogawa CENTUM VP Power Supply Module

The Yokogawa SPW481, also cataloged as the SPW481 Power Supply Module, provides AC-to-DC power conversion for compatible Yokogawa control system units. It accepts a specified AC input and supplies DC power to system hardware. The supplied documentation describes single-module and dual-redundant configurations for Field Control Units (FCUs), FIO node units, and optical ESB bus repeater units.

Hardware Specifications

AC Input and Redundant Power Configuration

The SPW481 description specifies a nominal input range of 100-120 V AC with a tolerance of +/- 10%. The stated input frequency is 50/60 Hz +/- 3 Hz, with maximum input consumption of 200 VA.

For a dual-redundant arrangement, the supplied information identifies two matching modules installed in slots P1 and P2. Confirm the target unit's hardware configuration and power supply compatibility before installation. The provided data does not establish the redundancy transfer time, output voltage, or load-sharing behavior.

Frequently Asked Questions

Q: What input voltage does the SPW481 support?

A: The supplied model-specific description states 100-120 V AC +/- 10%. The separate 100-240 V AC specification has not been verified for this exact model and should not be treated as its confirmed input range.

Q: Can two SPW481 modules provide redundant power?

A: The supplied description identifies a dual-redundant arrangement using two matching modules in slots P1 and P2. Confirm the applicable system manual for redundancy behavior, permissible load, and module replacement procedures.

Q: Is the SPW481 hot-swappable?

A: The supplied description reports hot-swap capability. However, the permitted removal procedure and any restrictions depend on the host unit and system configuration. Consult the relevant Yokogawa hardware manual before removing a powered module.

Field Installation Guidelines

• Verify the module nameplate and host-unit documentation before connecting the AC input.
• Confirm that the incoming supply voltage and frequency fall within the specifications for the exact module variant.
• Install the module in the designated power supply slot and secure it according to the host unit's instructions.
• For redundant installations, confirm module compatibility, slot assignment, and system configuration before energizing the equipment.
• Keep AC input wiring separate from low-level analog signal and communication wiring where practical.
• Follow the host system's protective grounding and bonding requirements. Do not use signal cable shields as protective earth conductors.
• Confirm that the enclosure provides the required cooling and environmental conditions.
• Do not remove or insert the module under power unless the applicable hardware manual explicitly permits that procedure.