Yokogawa S9129FA VFD10D NI-MH Battery Pack

Product Overview

The Yokogawa S9129FA serves as the dedicated backup power solution for the VFD10D module within Yokogawa Distributed Control Systems (DCS). This Nickel-Metal Hydride (NI-MH) battery pack provides critical energy to maintain volatile memory and configuration data during main power loss. By preventing data erasure in the VFD10D unit, the S9129FA ensures the control system resumes operation instantly without requiring time-consuming manual reloads or system re-initialization.

Technical Specifications

The S9129FA utilizes high-stability cell chemistry to provide long-term voltage support:

Engineering Advantages

• Stable Voltage Discharge: The NI-MH chemistry within the S9129FA delivers a highly consistent 2.4 V output. This stability prevents the voltage drops that lead to RAM corruption, ensuring the VFD10D module retains its logic and parameters throughout the duration of a power outage.

• Extended Service Life: This battery pack withstands the continuous trickle-charging cycles common in industrial control nests. The internal cells resist the "memory effect," maintaining their full charge capacity over years of standby operation in the DCS cabinet.

• Tool-Free Installation: The S9129FA features a specialized keyed connector designed specifically for Yokogawa hardware. This design eliminates the risk of reverse polarity during installation and allows maintenance teams to perform battery swaps in cramped marshalling cabinets quickly and safely.

• Environmental Tolerance: The battery housing utilizes industrial-grade materials that resist the high ambient temperatures often found in non-ventilated control rooms. This thermal resilience prevents chemical leakage and ensures the battery functions reliably at the end of its service life.

FAQs

• Is the Yokogawa S9129FA battery pack supplied as new?

  Yes. We supply the S9129FA strictly as 100% Brand New and Original equipment. Every battery pack arrives in its factory-sealed Yokogawa packaging, ensuring you receive the full chemical service life rated by the manufacturer.

• Can I use the S9129FA to replace old lithium-style batteries?

  The S9129FA specifically serves as the NI-MH equivalent for systems utilizing the VFD10D architecture. While it replaces the function of previous backup solutions, always verify that your specific module revision supports the 2.4 V NI-MH charging circuit before installation.

• How often should I replace this battery pack?

  Yokogawa typically recommends a replacement interval based on the ambient temperature of your control room. Under standard conditions, we suggest replacing the S9129FA every 2.4 to 3 years to ensure the cells remain capable of holding a full charge during an emergency.

• Does this battery pack require a full charge before installation?

  The system's internal charging circuit will manage the battery once installed. However, we recommend checking the "Battery Low" alarm on the DCS console after 24 hours of operation to confirm the S9129FA has reached its nominal operating voltage.