YOKOGAWA 0950-3017 / PS605-0101: Regulated DC Power Module for DCS

Technical Specifications

Main Features and Advantages

High Availability through Dual-Input Redundancy: The defining feature of the YOKOGAWA 0950-3017 (PS605-0101)​ is its integrated dual AC input design, engineered for maximum system uptime. It accepts two separate AC power feeds, typically from different electrical distribution branches or an uninterruptible power supply (UPS) system. This built-in redundancy ensures that a failure or brownout on one power line will not interrupt the DC output; the module instantly and seamlessly draws power from the remaining active input. This architecture is a fundamental building block for creating fault-tolerant control stations, eliminating the power supply as a single point of failure and is crucial for applications in continuous processes where shutdowns are prohibitively expensive or dangerous.Robust Power Conditioning and Protection: Beyond redundancy, the YOKOGAWA 0950-3017 (PS605-0101)​ excels at delivering exceptionally clean and stable DC power. Its switched-mode design incorporates advanced filtering to suppress electrical noise from the AC mains, preventing it from propagating into the sensitive electronics of the CPU and I/O modules. This results in more accurate analog signal measurement and digital signal integrity. The module is fortified with a comprehensive suite of protective circuits. Overvoltage protection (OVP) clamps the output to safe levels, overcurrent protection (OCP) limits output during faults, and overtemperature protection (OTP) safeguards the module’s internal components. These features protect not only the power supply itself but, more importantly, the valuable and critical control modules downstream.Compact, Reliable, and System-Integrated Design: Designed specifically for integration into Yokogawa CENTUM racks, the YOKOGAWA 0950-3017 (PS605-0101)​ offers a compact, convection-cooled form factor that saves panel space and eliminates the potential failure point of a cooling fan. Its reliability is backed by high-quality components and a design optimized for 24/7 industrial operation. The module provides clear status and fault indication through LEDs, aiding in rapid diagnostics. Its plug-in design into the dedicated rack slot ensures a secure connection to the backplane, simplifying installation and replacement. This combination of features makes the YOKOGAWA 0950-3017 (PS605-0101)​ a trusted, set-and-forget component that provides the foundational power quality and availability required for mission-critical process automation.

Application Field

The YOKOGAWA 0950-3017 (PS605-0101)​ power supply module is exclusively deployed within Yokogawa’s CENTUM series Distributed Control Systems (DCS), forming the power core for field control stations and I/O nodes across a vast range of heavy process industries. In oil and gas, it is fundamental for upstream production platforms, midstream pipeline compressor stations, and downstream refinery control. Here, it powers the controllers and I/O modules that manage critical safety interlocks, flow control, pressure regulation, and emergency shutdown (ESD) sequences. The redundancy of the YOKOGAWA 0950-3017 (PS605-0101)​ is non-negotiable in these environments, as a power failure could lead to unsafe conditions, production loss, or environmental incidents.Within the power generation sector, this module provides clean, reliable power for DCS racks controlling boiler management, turbine sequencing, and balance-of-plant operations in fossil fuel, combined-cycle, and biomass plants. The stability of the 24VDC bus, ensured by the YOKOGAWA 0950-3017 (PS605-0101), is critical for the precise analog measurements (temperature, pressure, flow) that govern combustion efficiency and plant safety. Similarly, in large-scale chemical and petrochemical plants, the module powers the complex regulatory control loops, batch sequencing, and safety instrumented functions for reactors, distillation columns, and mixing vessels. Its ability to filter electrical noise is paramount in facilities with large motor drives and variable frequency drives that can induce harmonics onto the power line.The module is also essential in industries like pulp and paper, pharmaceuticals, and water/wastewater treatment, where Yokogawa DCS is used for plant-wide automation. In these applications, the YOKOGAWA 0950-3017 (PS605-0101)​ ensures that the entire control system’s “nervous system” – from the field sensor inputs to the final control element outputs – operates on a stable voltage plane, free from disturbances that could cause measurement drift, control loop oscillation, or spurious alarms. Its role, while often overlooked, is absolutely foundational to the integrity, safety, and profitability of continuous and batch process operations worldwide.