Description

The Yokogawa 0950-3017 (PS605-0101) is a rack-mounted power supply module designed for Yokogawa’s CENTUM CS 3000, CENTUM VP, and CENTUM CS distributed control systems (DCS). This module serves as the primary power source for control station racks, converting AC mains power into stable DC voltages for CPU modules, I/O cards, and internal communication buses.

Engineered for 24/7 continuous operation, the PS605-0101 is a cornerstone of Yokogawa’s high-availability DCS architecture. Its support for 1:1 redundancy and hot-swap replacement ensures uninterrupted power delivery even during module maintenance or failure events—a critical requirement for continuous process industries.

Application Scenarios

In a large petrochemical refinery operating 24/7, the Yokogawa 0950-3017 is deployed in pairs within the CENTUM VP control station. One module serves as the active power supply while the second operates in hot-standby mode. When the primary module experiences an internal fault, the PS605-0101 standby unit detects the voltage drop and seamlessly takes over within 3 milliseconds. The entire transition is invisible to operators, and no I/O points or control loops experience interruption. The faulty module can then be hot-swapped for a replacement without shutting down the control station, eliminating costly unplanned downtime.

At a power generation facility, a single 0950-3017 was experiencing intermittent output due to aging capacitors. The control system logged “Power Supply Fail” alarms but maintained operation through the redundant partner. Maintenance engineers identified the failing unit via front-panel LED indicators and replaced it during a scheduled maintenance window—without ever disrupting the generator control logic. This redundancy capability is essential for critical infrastructure where unexpected control system shutdowns are unacceptable.

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