S9548FA | Yokogawa 2.4V 1900mAh | System Backup Battery Pack

Product Description

The S9548FA is a specialized industrial battery assembly designed for Yokogawa Distributed Control Systems (DCS), specifically within the CENTUM VP and CS 3000 hardware families. This high-capacity nickel-metal hydride (Ni-MH) or lithium-based rechargeable pack provides the critical DC voltage required to maintain volatile memory (SRAM) and system configuration data during primary power interruptions. By ensuring that the Field Control Station (FCS) retains its internal parameters, the S9548FA prevents the loss of revolution counters and user-defined logic during maintenance or unplanned outages.

Constructed for high reliability in industrial control environments, this battery unit features a stable 2.4V output and a 1900mAh capacity, offering extended discharge times compared to standard backup cells. It is typically housed in a protective casing with a keyed connector to ensure secure, vibration-resistant installation within the CPU or power supply module of the Yokogawa rack.

Technical Specifications

• Brand: Yokogawa

• Model Designation: S9548FA

• Equipment Type: Backup Battery Pack / Memory Support Unit

• Nominal Voltage: 2.4V DC

• Rated Capacity: 1900 mAh

• Cell Chemistry: Industrial Grade rechargeable cells

• System Compatibility: Yokogawa CENTUM VP, CS 3000, and compatible Field Control Units

• Primary Function: SRAM Data Retention and Real-Time Clock (RTC) support

• Connector Type: Specialized multi-pin industrial lead

• Weight: Approx. 0.15 kg

• Operating Temperature: Optimized for internal control cabinet environments

Operational Applications

The S9548FA (S9548FA) is essential for any Yokogawa DCS installation in refineries, chemical plants, and power utility sites. It acts as the final safeguard for process data, ensuring that when power is restored, the system can perform a warm start rather than a cold reboot, significantly reducing recovery time and preventing the need for manual parameter re-entry.

FAQ

How often should the S9548FA battery pack be replaced?

Yokogawa generally recommends a preventative maintenance cycle of 2 to 3 years for the S9548FA , depending on the ambient temperature of the cabinet. High temperatures can accelerate the chemical depletion of the cells.

What happens if the battery fails during a power outage?

If the S9548FA is depleted, the Field Control Station will lose its internal memory contents. Upon power restoration, the system will trigger a "Battery Alarm" and require a full software download from the Engineering Workstation to restore operations.