S9765UK Yokogawa CENTUM CS 3000 Memory Backup Battery

Product Overview

The Yokogawa S9765UK functions as the critical power backup component for CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). This 100% Brand New original Nickel-Cadmium (Ni-Cd) battery pack provides 4.8 V DC to ensure the continuous operation of CPUs and volatile memory boards. By maintaining power during primary supply failures or routine maintenance cycles, the S9765UK prevents the loss of sensitive configuration data, process variables, and historical alarm logs. Its industrial-grade chemistry excels in providing the stable discharge rates required to protect high-value DCS hardware in energy, chemical, and manufacturing facilities.

Technical Specifications

Engineering Advantages

• Optimized Ni-Cd Chemistry: The S9765UK utilizes Nickel-Cadmium cells specifically chosen for their flat discharge curve and resilience. This technology maintains a consistent 4.8V output until the end of the discharge cycle, ensuring the DCS logic remains stable during critical power-loss events.

• Thermal Resilience in Enclosures: Industrial control cabinets often experience significant temperature fluctuations. The S9765UK withstands extreme thermal stress without significant capacity degradation, a common failure point for standard commercial batteries.

• Extended Cycle Life: This battery pack supports high numbers of charge/discharge cycles. The robust internal construction resists the "memory effect" and chemical degradation, providing reliable service life within the 24/7 operating cycles of a process control station.

• Lightweight, High-Integrity Housing: Weighing only 200g, the module installs securely without adding significant mechanical load to the chassis. The housing protects the cells against industrial vibration and the corrosive atmospheres often found in petrochemical and offshore platforms.

• Seamless Integration: Designed specifically for the CENTUM architecture, the S9765UK features the exact connector interface required for instant installation. This ensures a gas-tight electrical connection, preventing contact oxidation and intermittent power failures.

FAQs

• Q: How often should I replace the S9765UK battery pack?

• A: We recommend following your Yokogawa preventive maintenance schedule, which typically advises replacement every 2 to 3 years. Regular replacement ensures the 700 mAh capacity remains sufficient to bridge extended outages.

• Q: Can the S9765UK be used with non-Yokogawa systems?

• A: No. The voltage rating and specialized connector interface are proprietary to the Yokogawa CENTUM VP and CS 3000 FCS (Field Control Station) hardware.

• Q: What indicates that the battery needs replacement?

• A: The CENTUM DCS monitors the battery voltage continuously. If the voltage drops below a safe threshold, the system triggers a "Battery Low" alarm on the HIS (Human Interface Station), indicating that the 4.8V output is compromised.

• Q: Does this battery require a full charge cycle upon installation?

• A: This Brand New original battery arrives with a factory charge. However, once installed, the internal DCS charging circuit will automatically bring the pack to its optimal float voltage and maintain it at full readiness.