Product Overview

The Yokogawa PW481-50 serves as the primary regulated power source for CENTUM VP Field Control Units (FCU). This high-efficiency switching power module converts standard AC input into stable 24VDC to drive processor modules, I/O cards, and system backplanes. We supply this unit as 100% brand new and original, ensuring your DCS architecture maintains the high availability required for mission-critical industrial processes. As the official successor and direct replacement for the PW481-10, the PW481-50 incorporates enhanced thermal management and fault-tolerant circuitry to support continuous operation in demanding refinery and power plant environments.

Part Number Breakdown

The PW481 series nomenclature reflects its specific application within the CENTUM VP ecosystem:

Technical Specifications

The PW481-50 integrates comprehensive protection circuitry with a wide-range input:

Engineering Advantages

• Seamless Legacy Migration: The PW481-50 functions as a 1:1 replacement for the PW481-10. Engineers can swap legacy units without modifying rack wiring or software configurations, significantly reducing downtime during hardware refreshes.

• Integrated Fault Tolerance: The module features robust over-voltage and over-current protection. In the event of a field-side short circuit or input surge, the PW481-50 isolates the fault to prevent damage to the expensive processor and I/O modules downstream.

• High-Efficiency Passive Cooling: The advanced switching design minimizes energy loss and heat dissipation. This allows the unit to operate at peak current loads within unconditioned control cabinets, maintaining stable output even at ambient temperatures up to +70 °C.

• Redundant Configuration Support: For safety-critical loops, the PW481-50 integrates perfectly into dual-redundant power schemes. This configuration ensures the Field Control Station remains powered even if one input source or power module fails.

FAQs

• Can I mix the PW481-50 with an older PW481-10 in a redundant pair?

  Yes. The PW481-50 is fully compatible with its predecessor. You can install it alongside a PW481-10 in a dual-redundant power setup to facilitate a gradual upgrade of your power infrastructure.

• What are the mounting requirements for this module?

  The PW481-50 slides directly into the dedicated power supply slots of the AFV30 or AFV40 base plates. It utilizes heavy-duty backplane connectors to ensure a secure, low-resistance electrical interface.

• Does this unit handle voltage fluctuations at remote sites?

  The module accepts a wide universal AC input (100–240 VAC ±10%). Its internal regulation circuitry compensates for line voltage drops or surges, delivering a consistent 24VDC to the control logic.