S9548FA Yokogawa Backup Battery Pack

Overview

The Yokogawa S9548FA, also cataloged as the S9548 Backup Battery Pack, operates as a dedicated hardware component for backup power delivery and RAM data retention within Yokogawa CENTUM CS 1000 and CENTUM CS 3000 control platforms. The battery pack uses Ni-MH cells with a nominal output of 2.4 VDC and a capacity of 1900 mAh.

Hardware Specifications

Yokogawa DCS Backup Power Characteristics

The S9548FA supports stored data retention when the associated control hardware loses its primary power source. During normal system operation, the battery remains connected to the designated charging circuit. When primary power becomes unavailable, the backup circuit can maintain the supply required for supported RAM retention functions.

Yokogawa DCS systems commonly integrate analog and digital process control functions, including 4-20 mA signal processing and field instrument communication. However, the S9548FA does not process field signals directly. Instead, it supports the continuity of stored controller information by maintaining backup power for the designated memory circuit.

The factory-installed connector provides a defined electrical interface and avoids field soldering. Therefore, installation should use the specified connector orientation and compatible Yokogawa hardware.

Frequently Asked Questions

Q: Does the Yokogawa S9548FA directly power the complete CENTUM controller during a power failure?
A: No. The S9548FA is specified as a backup battery pack for RAM data retention and designated backup functions. It should not be considered a replacement for the main controller power supply.

Q: Can the S9548FA be replaced while the control system remains energized?
A: Replacement conditions depend on the specific CENTUM controller or power module design. Follow the applicable Yokogawa maintenance procedure before disconnecting the battery because backup memory requirements may vary by hardware configuration.

Q: Can standard loose Ni-MH cells replace the S9548FA assembly?
A: The provided specification identifies a factory pre-wired connector and an equivalent battery reference. Replacement should use a compatible battery assembly with the correct voltage, capacity, connector, and polarity.

Field Installation Guidelines

• Verify the controller or power module is compatible with the Yokogawa S9548FA before installation.
• Confirm the battery connector orientation and polarity before applying the connection.
• Do not modify, solder, or extend the factory battery wiring unless the applicable equipment documentation specifically permits it.
• Isolate the equipment according to the approved maintenance procedure before battery replacement when live replacement is not supported.
• Keep the battery wiring away from damaged insulation, sharp metal edges, and high-current power conductors.
• Inspect the connector for oxidation, mechanical damage, or loose contacts before installation.
• Record the battery replacement date as part of the preventive maintenance program.
• Dispose of the removed Ni-MH battery pack according to applicable industrial battery recycling requirements.

Customers Also Viewed

Contact: Manski Wong +86 18030205725 manski@cambia.cn