Product Details
Product Description
The S9548FA is a high-reliability lithium thionyl chloride (Li-SOCl2) battery assembly specifically engineered for Yokogawa control systems. Its primary function is to provide critical volatile memory (VRAM) backup for CPU modules and various communication interface cards during main power interruptions. By maintaining the integrity of system parameters, configuration data, and real-time clock settings, the S9548FA prevents the loss of essential operational logic, ensuring a rapid and safe system recovery after a power cycle.
This industrial-grade power cell is housed in a protective casing with a dedicated lead and connector interface, designed to prevent polarity reversal and ensure a secure fit within high-vibration environments. It is a vital maintenance component for ensuring the long-term uptime of distributed control system (DCS) nodes and safety instrumented system (SIS) racks.
Technical Specifications
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Cell Chemistry: Lithium Thionyl Chloride (Li-SOCl2)
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Nominal Voltage: 3.6 VDC
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Storage Capacity: High-density energy cell optimized for long-term discharge
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Connector Type: Proprietary Yokogawa 2-pin polarized plug
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Operational Lifespan: Typically 3 to 5 years (varies based on ambient temperature and power-off frequency)
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Compatibility: Primarily used in CENTUM VP, CENTUM CS 3000, and ProSafe-RS CPU units
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Self-Discharge Rate: Extremely low (<1% per year at room temperature)
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Storage Temperature: Recommended 0°C to 30°C for maximum shelf life
Maintenance Applications
The S9548FA is deployed across critical control infrastructures to safeguard logic programs in controllers and communication modules. It is an essential spare part for scheduled preventative maintenance cycles in refineries, chemical plants, and power generation facilities where data persistence is mandatory for safety and production continuity.
Frequently Asked Questions
When should the S9548FA battery be replaced?Standard industrial protocol recommends replacement every 3 years. However, if the "BATTERY LOW" diagnostic LED illuminates on the Yokogawa controller, the S9548FA must be swapped immediately while the system is powered up to avoid data loss.
Can I replace the battery while the system is running?Yes, in most Yokogawa CPU architectures, the battery is designed to be replaced under power to ensure the volatile memory remains energized. Please consult the hardware manual for your specific controller model for safety procedures.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.
Mastering Wire Identification in Industrial Automation: The Power of Ferrules and Cross-Ferruling
Proper wire labeling forms the cornerstone of reliable control system installation and long-term maintenance. In complex industrial automation environments, technicians terminate thousands of conductor ends inside control panels, marshalling racks, and field junction boxes. Ferrules serve as individual tube-shaped sleeve markers slipped onto conductors before final termination. While technicians historically relied on pre-printed individual letter rings, modern control panel builders utilize automated ferrule printing machines. These thermal-transfer printers generate durable, single-sleeve heat-shrink tags directly matching approved wiring schematics, significantly accelerating cabinet assembly workflows.
Understanding Marshalling Cabinets in Industrial Automation and Control Systems
Marshalling cabinets serve as the crucial connection hub between field instruments and centralized processing units. In large DCS and PLC control system architectures, hundreds of multipair field cables run from local junction boxes to the central instrument equipment room. The marshalling cabinet houses field terminal blocks, surge arresters, intrinsic safety isolation barriers, and interposing relays. By segregating field field-wiring terminations from sensitive processor hardware, engineers protect expensive controller backplanes from high-voltage transients. Consequently, this modular separation dramatically streamlines maintenance workflows and simplifies system expansion.