Yokogawa S9971DB-0 CPU Backup Battery Module

Overview

The Yokogawa S9971DB‑0 is a dedicated CPU backup battery module engineered for Yokogawa DCS and PLC systems. Its core function is to preserve system memory and CPU state during unexpected power interruptions, preventing program loss, data corruption, and unplanned system restarts. Designed for demanding industrial environments, this module integrates seamless power switchover, rugged construction, and reliable long-term operation.

Key Features

• Automatic switch to backup power during outages

• Nickel‑Metal Hydride (NiMH) battery technology for stable, long-duration support

• Compact, modular design for easy installation and replacement

• Fully compatible with Yokogawa DCS and PLC platforms

• Supports remote monitoring and diagnostic feedback (system-dependent)

• Designed for continuous industrial operation with minimal maintenance

Technical Specifications

Electrical Parameters

Physical Dimensions

Environmental & Compliance

• Operating Temperature: -10°C to 55°C (typical industrial range)

• Material Compliance: RoHS, REACH

• Safety Certifications: CE, UL, and other international standards

System Compatibility

• Yokogawa DCS systems

• Yokogawa PLC platforms

• Supports redundant CPU configurations for critical applications

Applications

• Chemical and pharmaceutical process control

• Power generation and distribution monitoring

• Manufacturing automation and robotics

• Building management systems

• Environmental and wastewater treatment monitoring

FAQ

Q: Can the S9971DB‑0 be replaced while the system is running?
A: Hot-swap support depends on system configuration; consult the Yokogawa manual for your specific CPU model.

Q: What is the typical service life of the battery?
A: NiMH batteries provide stable backup for 3–5 years under normal industrial operation and charging cycles.

Q: Are there alternative models for higher backup capacity?
A: Yokogawa S9971DA series modules offer extended runtime and additional monitoring features.