Product Details

The Yokogawa S9129FA serves as a specialized PLC backup battery designed for the CENTUM VP and CS 3000 Distributed Control Systems (DCS). This lithium-based module provides the necessary power to preserve volatile memory and internal system configurations during primary power interruptions. We supply this component as 100% brand new and original, featuring the designated black connector plug for direct integration into Yokogawa control modules.

Product Overview

The S9129FA prevents critical data loss by maintaining the CPU's internal memory and real-time clock (RTC) during power outages or system maintenance. Without a functional backup battery, a DCS controller loses its project parameters and historical logs upon restart. This battery utilizes high-density lithium chemistry to deliver a stable discharge voltage over an extended service life, ensuring that your automation processes resume immediately without requiring a full system reconfiguration.

Technical Specifications

Engineering Advantages

• Optimized Memory Retention: The 1200mAh capacity specifically targets the power requirements of Yokogawa CPU modules. It provides a long-term buffer that keeps the system database alive during extended shutdowns.

• Polarized Black Plug Interface: The integrated black connector prevents reverse polarity installation. This design ensures that field technicians can replace the battery quickly without risking damage to the controller's internal circuitry.

• Superior Chemical Stability: The lithium chemistry exhibits an extremely low self-discharge rate, typically less than 1% per year at room temperature. This provides a shelf life of up to 10 years, allowing you to stock spare units for long-term maintenance cycles.

• Industrial Thermal Resilience: The S9129FA operates reliably across a wide temperature range (–20°C to +60°C). This stability protects system data even when control cabinets experience significant heat buildup or are located in unconditioned environments.

• Compact Footprint: The module’s slim design fits precisely within the designated battery compartment of the CENTUM station. This prevents mechanical interference with adjacent I/O cards and ensures a vibration-resistant fit.

FAQs

Is the Yokogawa S9129FA rechargeable?

No. The S9129FA is a primary lithium battery. You must replace the unit once it depletes. Never attempt to recharge this battery, as doing so may cause leakage or damage to the PLC module.

When should I replace the S9129FA?

While the battery has a long shelf life, industrial standards recommend replacement every 3 to 5 years. Most Yokogawa CENTUM systems monitor battery voltage and will trigger a "Battery Low" alarm on the Human Interface Station (HIS) to notify you before data loss occurs.

Can I replace the battery while the DCS is powered on?

Yes. In most Yokogawa DCS configurations, you can replace the backup battery while the controller is receiving primary power. This "hot-swap" capability ensures that the memory remains powered by the system bus while you exchange the battery unit.

Does the black plug indicate a specific compatibility?

Yes. The black plug is a specific connector key for certain Yokogawa series controllers. Always verify that your current battery uses the same black connector and voltage (2.4V) before installation to ensure 100% hardware compatibility.