Description

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The Yokogawa PS-502-01 is a reliable power supply module designed for distributed control environments developed by Yokogawa Electric Corporation. It is commonly used in Yokogawa CENTUM and related safety or process automation platforms to provide stable DC power to control modules, I/O interfaces, and system electronics.

This module converts an incoming 24 V DC field supply into regulated outputs required by system logic and field circuits, ensuring consistent and uninterrupted operation of mission-critical automation systems. Its robust industrial design and protection features make it suitable for continuous operation in demanding environments such as oil & gas, petrochemical, and power generation plants.

 

Key Specifications

Model: PS-502-01

Manufacturer: Yokogawa

Product Type: Power Supply Module

Input Supply Voltage: 24 VDC ±10% (temporary +20%)

Regulated Output Voltage: 20 VDC ±1% (adjustable)

Unregulated Output Voltage: 24 VDC (+10% / −5%)

Maximum Output Current: Up to 1 A (total combined load)

Efficiency: Approx. 71% at full load

Isolation: 0.5 kV (input to output test)

Operating Temperature: −20 °C to +70 °C

Storage Temperature: −25 °C to +85 °C

Connector: DIN 41612 48-pin interface

Mechanical Format: Single Euro card, 6TE (160 × 100 × 30 mm)

Status Indicators: LED indicators for power status

Main Features & Advantages
Stable DC Power Distribution

The module converts unstable field voltage into regulated DC power to supply sensitive control electronics, ensuring stable system performance and preventing voltage fluctuations from affecting automation equipment.

High Reliability for Critical Systems

Designed for continuous operation in industrial environments, the module supports long-term system stability in applications where downtime must be minimized.

Integrated Protection Mechanisms

Electronic current limiting, fuse protection, and isolation help protect both the power module and connected equipment from overload or electrical faults.

Compact Euro-Card Design

The single Euro-format board allows easy installation inside DCS racks or control cabinets, simplifying maintenance and replacement.

Support for Redundant Power Configurations

In many control systems, the module can be deployed in redundant configurations to ensure uninterrupted operation during power supply failures.

Typical Applications

Distributed Control Systems (DCS)
Supplies stable power to control processors and I/O modules in Yokogawa CENTUM automation systems.

Safety Instrumented Systems (SIS)
Provides reliable power for safety platforms and protection systems in critical process industries.

Oil & Gas and Petrochemical Plants
Ensures uninterrupted power for process control nodes and field interface electronics.

Power Generation Facilities
Used in turbine control systems and plant automation infrastructures requiring reliable power distribution.

Frequently Asked Questions (FAQ)

Q: What is the main function of the PS-502-01 module?
A: It converts a 24 VDC field supply into regulated DC outputs that power control system modules and interfaces.

Q: Which control systems use this module?
A: It is commonly used in Yokogawa CENTUM DCS and related automation platforms.

Q: Is the PS-502-01 still in production?
A: Some suppliers list it as discontinued by the manufacturer, but refurbished and replacement units are still available in the industrial spare-parts market.