Product Description

The PW482-51 is a specialized power supply and controller module for the Yokogawa CENTUM VP and CS 3000 Distributed Control Systems (DCS). Unlike general-purpose power units, it is an exclusive component for Field Control Units (FCU), FIO Node Units, and Optical ESB Bus Repeater Units. The module stabilizes system-side logic power while providing clean excitation power to field transmitters and transducers.

Technical Specifications

• Model / Revision: PW482 (PW482-51)

• Primary Input: 220–240 V AC (±10%) at 50/60 Hz

• Power Consumption: Maximum 230 VA

• Output Capacity: Rated for 50 W within the system rack

• Environmental Protection: ISA Standard G3 conformal coating for corrosive atmospheres

• Operating Temperature: -20 °C to 70 °C (G3 variant)

• Wiring Interface: High-torque M4 screw terminals for secure input/output connections

• Weight: 1.0 kg 

• Redundancy Support: Dual-redundant configuration when two identical modules are installed in slots P1 and P2

Application & System Role

The PW482-51 functions as the “energy heart” of Yokogawa control nodes:

• Powers internal I/O module circuitry

• Provides external 24 V DC loops for field meters and transducers

• Dual-redundant setup: Modules operate in parallel; if one unit fails, the other instantly carries the full load without disrupting process control or data acquisition

Technical FAQ

Q: Can the PW482 be used as a standalone 24 V power supply for other brands?
A: No. The PW482 uses an exclusive backplane connector designed for Yokogawa FCU and Node units and cannot be used as a generic laboratory or DIN-rail power supply.

Q: What is the difference between the PW481 and PW482?
A: The PW481 is for 100–120 V AC systems, while the PW482 is intended for 220–240 V AC power grids.