YOKOGAWA SR1030B62 high-precision Power Supply Unit (PSU)

The Yokogawa SR1030B62 is a high-precision Power Supply Unit (PSU) specifically engineered for the CENTUM CS 1000 and CENTUM CS 3000 Distributed Control Systems (DCS).

It belongs to the SR series of modular power supplies designed to provide stable, low-noise DC power to the CPU and communication nests within an instrumentation rack.

1. Introduction

The SR1030B62 is a "back-end" power module, typically mounted in a dedicated power supply nest. It converts standard AC utility power into the highly regulated DC voltages required by the controller's internal circuitry.

The "B62" suffix identifies its specific configuration, including input voltage range (100–120 V AC) and its capacity for redundant operation.

This module is a "heart" component for legacy systems, ensuring that even if one power source fails, the control system remains fully operational.

2. Technical Parameter Table

Mission-Critical Reliability: Built with high-grade industrial capacitors and components meant for a 15–20 year operational lifespan.

Dual-Line Redundancy: Specifically designed to work in a "dual-redundant" mode where two SR1030 units share the load; if one fails, the other assumes 100% load with zero transition time (bumpless).

Clean DC Output: Features advanced filtering to prevent electrical noise from the AC grid from interfering with sensitive analog-to-digital conversions in the I/O modules.

Fail-Safe Alarm: Equipped with a "Contact Output" that triggers an alarm on the operator's console (HIS) the moment the module detects an internal fault or loss of input power.

Robust Protection: Includes built-in overvoltage and overcurrent protection to safeguard expensive CPU and communication cards.

4. Application Cases

Legacy DCS Maintenance: Serving as a vital replacement part for ageing CENTUM CS 1000/3000 systems in refineries and chemical plants.

Critical Control Nests: Powering the communication bridge modules that link the control station to the plant-wide network.

24/7 Process Control: Essential in industries like glass manufacturing or iron smelting, where a power reset could lead to catastrophic equipment damage or solidified materials.

Emergency Infrastructure: Used in some older Safety Instrumented Systems where stable, redundant power is a prerequisite for SIL compliance.

5. Related Models & Same Series

The SR series of power supplies covers various power levels and input types to suit global standards.

Other Models in the Same Series

SR1030B61: A variation with different output capacities or terminal types.

SR1030B63: The 220–240 V AC input version, typically used in European or Asian regions.

SR1030B64: The 24 V DC input version for sites relying on battery banks.

Related System Components

SR1030-NEST: The physical housing/backplane where the SR1030B62 is installed.

PW481 / PW482: Power supply modules used in the newer FIO-style nodes (CENTUM VP).

AIP531: Communication modules that are typically powered by this SR-series unit.