Yokogawa Electric Corporation PW481-10 Power Module

The Yokogawa PW481-10 Power Module is an industrial AC-to-DC power supply module designed for Yokogawa CENTUM and FIO/FCU distributed control systems, delivering a dedicated 24 VDC system supply to CPU, I/O, and communication modules. Input is 100–120 VAC ±10% at 50/60 Hz, and the module outputs ~24 VDC capable of ~2.5 A, with a power consumption of ~200 VA; it is engineered specifically for Yokogawa control architectures and not a general-purpose power supply. It supports dual-redundant configurations (two modules) for reliability, installs in a rack/base module with slots P1–P2, and is compatible with Field Control Unit (FCU), FIO Node Unit, and Optical ESB Bus Repeater Units. The unit weighs approximately 1 kg, and common replacements include the PW481-50 (direct replacement), PW482 (220–240 VAC version), and PW484 (24 VDC version).