The Yokogawa F3PU20-ON (F3PU20-ON Power Supply Module) operates as a high-performance power distribution component, specifically engineered to provide stable 5 VDC output for the FA-M3 modular PLC series.

Hardware Specifications

Industrial Power Regulation and Reliability

The F3PU20-ON is designed to maintain consistent voltage regulation even under fluctuating industrial load conditions, ensuring the integrity of the FA-M3 backplane bus. Its architecture supports an allowable momentary power failure of 20 ms, providing a critical buffer during minor power disturbances. The module features robust noise immunity (1500 Vp-p) and strict dielectric strength standards, safeguarding the PLC logic and communication interfaces from line-side surges. The RDY green LED status indicator provides immediate confirmation of healthy power delivery to the backplane, facilitating efficient troubleshooting within the control cabinet.

Frequently Asked Questions

Q: Does the F3PU20-ON module support hot-swapping?

A: No. The F3PU20-ON is not rated for hot-swapping. Ensure the input AC power is disconnected and the system is de-energized before installing or removing the module to avoid electrical arcing or damage to the backplane terminals.

Q: Can the 5 A output capacity be sustained continuously?

A: The rated output is 4.3 A. While the module supports up to 5 A, it is critical to verify that your specific system configuration's total load remains within the rated specifications to prevent thermal throttling or premature aging of internal components.

Field Installation Guidelines

1. Verify the AC input source is within the 85–264 VAC range before connecting to the M3.5 screw terminals to prevent damage to the conversion circuitry.
2. Ensure the module is fully seated into the designated power slot of the FA-M3 base unit to guarantee proper electrical connection with the backplane.
3. Tighten the M3.5 screw terminals to ensure a low-resistance connection, preventing heat buildup at the input interface.
4. Maintain a clear space around the module to ensure proper airflow, as adequate ventilation is required to keep the operating temperature within the 0 deg C to 55 deg C limit.
5. Confirm that the RDY LED illuminates after power-up; if the LED is unlit, check the AC input voltage and inspect the terminal connections for security before performing further diagnostics.