Yokogawa S9185FA Battery Pack
Overview
The Yokogawa S9185FA Battery Pack is an essential industrial power backup component used in Yokogawa automation and control systems, especially in Distributed Control Systems (DCS) and PLC environments such as the ProSafe-RS safety control units. It delivers stable 3.6 V DC output to back up the processor module’s storage memory during power interruptions.
Manufactured to meet the demanding requirements of process control facilities, manufacturing plants, and utility infrastructure applications, this primary battery pack ensures that vital automation components remain operational and protected against unexpected power loss. It is commonly installed directly on boards or as a replaceable backup battery in power modules where ongoing data integrity is paramount.
Battery Construction & Chemistry
The S9185FA battery pack typically uses a lithium thionyl chloride (Li-SOCl₂) chemistry, providing:
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Long shelf life and high energy density suitable for industrial control applications.
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Defined replacement interval: Yokogawa recommends replacing the battery every 3 years at an average ambient temperature of 30 °C or less.
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Non-rechargeable design focusing on safety and memory backup reliability.
This battery technology is chosen for industrial applications because it resists self-discharge better than many alternatives, retains charge for extended durations, and supports long-term backup without frequent replacements.
Key Functional Benefits
The Yokogawa S9185FA Battery Pack offers several advantages for industrial control systems:
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Reliable Backup Power: Backs up the processor module’s management information held in storage memory during power outages.
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Reduced Downtime Risk: Protects against data loss, system resets, and unscheduled process disruptions.
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Industrial-Grade Design: A non-rechargeable primary cell intended for memory backup in industrial control equipment.
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Direct Replacement: Specified by Yokogawa as the memory-backup battery of the SCP461 processor module and of the S2SC70S/S2SC70D safety control unit (ProSafe-RS).
Typical Industrial Applications
This backup battery pack is critical in automation systems where reliable power retention ensures safety and continuity:
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Process control systems in chemical, oil & gas, power generation, and refining sectors.
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Distributed Control Systems (DCS) and PLC logic modules requiring memory backup.
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Manufacturing automation installations where loss of controller data can halt production.
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Utility and infrastructure automation where continuous system uptime is mandatory.
By providing stable backup power, the S9185FA plays a key role in minimizing system failures, upholding process integrity, and supporting high-availability control architectures.
Chemistry and Transport Classification
Yokogawa’s own safety documentation for this battery confirms a lithium thionyl chloride cell chemistry (containing thionyl chloride and aluminium chloride as active materials), consistent with the long-shelf-life, high-energy-density lithium primary cells widely used across the industry for DCS/PLC memory-backup duty. As a lithium metal cell, the S9185FA is classified under UN 3090 for transport as a dangerous good, which affects how replacement units must be packaged, labeled, and shipped — a detail that matters for GCC customers ordering spares internationally, since improperly declared lithium battery shipments can be delayed or refused by couriers and customs.
Technical Specifications
Parameter Value Manufacturer Yokogawa Part Number S9185FA Product Type Backup battery pack (lithium/ER6V type) Output Voltage 3.6 V DC Design Non-rechargeable (primary) Compatible Systems Yokogawa ProSafe-RS safety control units: SCP461 processor module (SSC60S/SSC60D) and S2SC70S/S2SC70D, per Yokogawa General Specifications Chemistry Thionyl chloride lithium (primary cell), per Yokogawa SDS Quantity per Unit 1 pc for S2SC70S; 2 pcs for S2SC70D (processor module is delivered without battery) Recommended Replacement Cycle 3 years at an average ambient temperature of 30 °C or less Transport Classification UN 3090 Lithium batteries, Class 9, Packing Group II (UN 3091 when contained in or packed with equipment) Conditions to Avoid Heat above 70 °C, incineration, crushing, piercing, disassembly, recharging, short circuit, long exposure to humidity Storage Cool, dry, well-ventilated area away from water, heat and ignition sources Fire Fighting Dry agent; do not use water Replacement and Handling Notes
Because this is a non-rechargeable primary cell dedicated to memory backup, it should be replaced on a preventive schedule rather than waited out until failure, since a fully depleted backup battery risks loss of controller configuration and time-stamped data during any subsequent power interruption to the host card. As with all lithium primary cells, used units should be disposed of through a proper battery-recycling/hazardous-waste channel rather than general waste, and replacement should only be performed with the system powered down per Yokogawa’s maintenance procedure for the specific card or module involved, to avoid disturbing other battery-backed circuits on the same board.
Why Backup Battery Health Matters
A backup battery in a DCS or PLC card is easy to overlook precisely because it does nothing visible while the system is running normally on mains power — its role only becomes critical the moment external power is interrupted. If the backup cell has already been depleted by that point, a card can lose its stored configuration, calibration parameters, or time-stamped historical data, turning a brief power blip into a much longer recovery effort involving reconfiguration or re-commissioning of the affected module. For process plants where the automation system is expected to run for years between planned shutdowns, tracking battery age and replacing on a preventive interval is a small, low-cost safeguard against a disproportionately expensive recovery scenario.
Many Yokogawa systems provide a low-battery alarm or diagnostic indication well before the cell is fully depleted, and maintenance teams are advised to treat that alarm as a scheduling trigger rather than something to defer, since the remaining margin after the alarm activates is deliberately conservative but not unlimited, and availability and lead time for the correct genuine replacement part should be confirmed in advance rather than at the moment the alarm is already active.
Documented Use in ProSafe-RS Safety Controllers
Replacement Interval and Safe Handling
Why Seven Star LLC
Seven Star LLC supplies genuine Yokogawa spare batteries, including the S9185FA, to process-control and DCS maintenance programs across Oman and the wider GCC, and confirms the exact host card or module the battery is intended for before shipment, along with correct dangerous-goods packaging and documentation for international spares logistics.
Request a Quote for Yokogawa S9185FA Battery Pack
Request a quote or technical inquiry for the Yokogawa S9185FA Battery Pack to ensure uninterrupted memory backup and reliable power retention for your industrial automation systems.
Ordering Notes
When quoting the S9185FA, Seven Star LLC confirms the exact host card, module, or controller family the battery is being sourced for, since Yokogawa battery part numbers are specific to a given card design and are not universally interchangeable across different DCS or PLC generations.
Related Products
- Document Yokogawa S9185FA Lithium Battery Safety Data Sheet Download
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Send the model and suffix code and the serial number from the nameplate, and for CENTUM modules the style code as well. For transmitters without a code we need span, output protocol, wetted materials, process connection, housing and the approval required. For oxygen analyzer spare parts give the detector and converter models, for example ZR22G and ZR402G, and the part number.Browse Yokogawa products by category: PLC & I/O Cards, Flowmeters, Pressure Instrumentation, Automation Accessories, Temperature Instrumentation.
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