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- Yokogawa
- S9971DB-0
- CPU Backup Battery Module
- Japan
- 160 × 100 × 25 mm
- 0.3 kg
- Xiamen, China
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Product Overview
The Yokogawa S9971DB-0 CPU Backup Battery Module is an industrial backup power component used in Yokogawa Distributed Control Systems (DCS). It is designed to provide temporary power support to the system CPU during main power interruptions, ensuring that critical data, configuration settings, and runtime states are preserved.
This module is widely used in mission-critical automation environments where system stability and data integrity are essential. Its compact industrial design and reliable backup performance make it suitable for continuous operation in demanding process control systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Yokogawa |
| Model | S9971DB-0 |
| Product Type | CPU Backup Battery Module |
| Function | CPU Memory & System Backup Power |
| System Compatibility | Yokogawa DCS / PLC Systems |
| Application | CPU Data Retention / Emergency Backup |
| Installation | Control Cabinet / CPU Module Slot |
| Dimensions | 160 × 100 × 25 mm |
| Weight | 0.3 kg |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -20°C to +70°C |
| Battery Type | Industrial Rechargeable Battery (NiMH type commonly used in similar modules) |
| Maintenance Type | Low-maintenance industrial module |
| Country of Manufacture | Japan |
Function and Working Principle
The S9971DB-0 operates as a CPU-level backup energy module, ensuring continuous protection of system data when main power is lost.
Its key functions include:
- Supplying backup power to the system CPU
- Preserving memory and configuration data
- Maintaining real-time system state during outages
- Supporting controlled system restart after power recovery
- Recharging automatically during normal operation
This ensures that the control system can resume operation without losing critical process information.
Role in Industrial Control Systems
Within Yokogawa Distributed Control Systems, the S9971DB-0 plays a central role in CPU reliability and system continuity. It supports:
- Central processor memory retention
- System configuration protection
- Real-time clock continuity
- Diagnostic data preservation
- Stable system recovery after power failure
It is an essential component for ensuring uninterrupted control system operation.
Industrial Applications
The Yokogawa S9971DB-0 CPU Backup Battery Module is widely used in:
- Distributed Control Systems (DCS)
- Oil and Gas Processing Plants
- Petrochemical Facilities
- Power Generation Stations
- Chemical Manufacturing Systems
- Water and Wastewater Treatment Plants
- Pulp and Paper Industry
- Pharmaceutical Production Systems
- Mining and Metallurgical Operations
- Large-scale Industrial Automation Systems
Its reliability makes it suitable for environments where CPU stability is critical.
Installation and System Integration
Proper installation ensures safe and stable operation.
Recommended practices include:
- Install in the designated CPU battery or module slot
- Ensure secure electrical connection and correct alignment
- Avoid exposure to excessive heat or humidity
- Replace only during controlled system shutdown
- Verify system recognition after installation
- Follow Yokogawa maintenance procedures
Correct installation helps maintain long-term stability and prevents data loss.
Compatible System Components
The S9971DB-0 is commonly used with:
- Yokogawa System CPU Modules
- Field Control Units (FCU)
- CENTUM VP Control Systems
- Memory Backup Circuits
- Power Supply Units
- Real-Time Clock Modules
- Control Cabinet Assemblies
- System Diagnostic Modules
These components rely on stable backup power for continuous operation.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| S9971DB-0 | CPU Backup Battery Module | CPU Memory Protection | DCS Systems |
| S9883FA | System CPU Battery | Enhanced CPU Backup | Control Systems |
| S9765UK | Ni-Cd Battery | Standard Backup Power | Industrial Systems |
| S9548FA | Battery Module | Compact Backup Design | Process Control |
| S9450FE | Battery Module | Lightweight Backup Unit | Automation Systems |
Key Advantages
- Reliable CPU memory backup support
- Prevents data loss during power failure
- Ensures fast system recovery
- Industrial-grade durable design
- Supports continuous 24/7 operation
- Strong compatibility with Yokogawa systems
- Low maintenance requirements
- Stable long-term performance
- Suitable for harsh industrial environments
Technical FAQs
What is the main function of the S9971DB-0?
It provides backup power to the system CPU, ensuring memory and configuration data are preserved during power interruptions.
Is it rechargeable?
Yes. It is designed as an industrial rechargeable battery module used for long-term operation.
Where is it used?
It is used in Yokogawa Distributed Control Systems and PLC environments for CPU-level backup.
Why is CPU backup important?
Because it ensures the system can restart safely without losing critical operational data.
Conclusion
The Yokogawa S9971DB-0 CPU Backup Battery Module is a critical component in Yokogawa Distributed Control Systems, designed to ensure stable CPU operation and data retention during power failures. With its industrial-grade construction, reliable backup capability, and strong system compatibility, it plays an essential role in maintaining continuous and stable performance in complex automation environments.