Yokogawa PW481 AC Power Supply Module

The Yokogawa PW481 (PW481 Power Supply Module) accepts a 100-120 V AC input at 50/60 Hz for power conversion within Yokogawa industrial control systems. The module has a maximum power consumption of 200 VA and uses an exclusive connector for its input/output interface. Output voltage and load capacity require confirmation against the applicable manufacturer documentation.

Hardware Specifications

AC Input and Power Conversion Characteristics

The PW481 receives AC power through its dedicated interface. The specified input range is 100-120 V AC with a frequency tolerance of +/- 3 Hz around 50/60 Hz. Maximum power consumption is 200 VA.

Before installation, verify the output voltage, output current capacity, connector assignment, and load requirements against the official Yokogawa documentation. Do not determine downstream load capacity from the input power rating alone.

The PW481 model designation has the following suffix options in the supplied data:

• -5: Standard type without explosion protection.
• -E: Standard type with explosion protection.
• 0: Basic type.
• 1: ISA Standard G3 option with a specified temperature range of -20 to +70 deg C.

Confirm the complete ordering code before selecting a replacement. The suffix options must be interpreted in the context of the manufacturer's complete model designation.

Frequently Asked Questions (FAQ)

Q: What input supply does the PW481 require?

A: The specified input is 100-120 V AC +/- 10% at 50/60 Hz +/- 3 Hz. The maximum power consumption is 200 VA.

Q: Can the PW481 be installed in an explosion-protected application?

A: The supplied suffix information identifies -E as the standard type with explosion protection and -5 as the standard type without explosion protection. Verify the complete model code and applicable certification before installation in a classified area.

Q: Is the PW481 output voltage confirmed as 24 VDC?

A: The supplied description lists a typical output of 24 VDC, but the detailed electrical table does not confirm the output rating. Check the official documentation for the exact version before connecting downstream equipment.

Field Installation Guidelines

• Verify the complete model and suffix codes against the equipment bill of materials and the applicable manufacturer documentation.
• Confirm that the AC supply remains within the specified voltage and frequency ranges before energizing the module.
• Isolate the power source before inserting, removing, or wiring the module. Do not assume hot-swap capability unless the system documentation explicitly permits it.
• Inspect the dedicated connector for correct alignment, secure engagement, and signs of damage.
• Route AC power wiring separately from low-level analog signal and communication cables where practical to reduce electrical interference.
• Follow the cabinet grounding and protective-earth requirements specified for the installed system. Do not use a signal shield as a substitute for protective grounding.
• Verify the output voltage, polarity, and permitted load before connecting downstream circuits.
• For explosion-protected installations, confirm that the complete module configuration and installation method meet the applicable certification requirements.