Yokogawa S9185FA Battery Pack 3.6V | SSC50D Safety Controller Backup Power Solution

Yokogawa S9185FA Lithium Battery Pack (Industrial-Grade Backup Power for Safety Controllers)

The Yokogawa S9185FA is a high-reliability 3.6V lithium battery pack engineered specifically for SSC50D safety system controllers within ProSafe-RS emergency shutdown (ESD) architectures. Through advanced lithium-thionyl chloride chemistry and SIL 3 certification, this battery delivers uninterrupted backup power to maintain critical safety logic during power outages, ensuring continuous protection for process industries including oil & gas, petrochemical, power generation, and chemical manufacturing facilities.

Designed for mission-critical applications where safety integrity and uptime are non-negotiable, the S9185FA addresses common challenges such as unexpected power loss, controller memory retention failures, and safety system unavailability. It is the preferred choice for safety engineers, instrumentation technicians, plant maintenance teams, and EPC contractors responsible for functional safety compliance and system reliability.

With standardized OEM specifications and field-proven performance across thousands of installations worldwide, this battery pack offers rapid replacement capability, extended service life (5+ years typical), and wide operating temperature tolerance (-20°C to +70°C). Contact our safety system specialists for compatibility verification, installation guidance, and volume pricing for multi-site projects.

Core Features & Technical Advantages

• SIL 3 Certified Reliability
  Compliant with IEC 61508 functional safety standards, ensuring the highest level of safety integrity for emergency shutdown and critical control applications, minimizing spurious trips and dangerous failures.
• Extended Service Life
  Engineered for 5+ years of continuous operation under normal conditions, reducing maintenance frequency and total cost of ownership while maintaining consistent voltage output throughout the battery lifecycle.
• Wide Operating Temperature Range
  Performs reliably from -20°C to +70°C, suitable for harsh industrial environments including outdoor installations, unheated control rooms, and extreme climate regions without performance degradation.
• OEM-Specified Compatibility
  Factory-matched to Yokogawa SSC50D safety controllers, ensuring plug-and-play installation with guaranteed electrical and mechanical compatibility, eliminating integration risks and warranty concerns.
• Low Self-Discharge Rate
  Lithium-thionyl chloride chemistry provides exceptional shelf life and minimal capacity loss during storage, making it ideal for spare parts inventory and emergency replacement scenarios.
• Comprehensive Protection Design
  Built-in safeguards against over-discharge, reverse polarity, and thermal runaway, protecting both the battery and connected safety controller from damage during abnormal operating conditions.

Typical Application Scenarios

This battery pack is essential for maintaining safety system integrity across diverse industrial sectors where process safety and regulatory compliance are paramount:

• Oil & Gas Production Facilities
  Provides backup power for wellhead shutdown systems, offshore platform ESD controllers, and pipeline safety instrumented systems (SIS), ensuring fail-safe operation during power interruptions in remote locations.
• Petrochemical & Refining Plants
  Supports burner management systems (BMS), reactor safety controls, and emergency isolation valves, maintaining protective functions during utility power failures to prevent catastrophic incidents and environmental releases.
• Power Generation Stations
  Backs up turbine overspeed protection, boiler safety interlocks, and generator excitation controls in coal, gas, nuclear, and renewable energy facilities, ensuring safe shutdown sequences during grid disturbances.
• Chemical Manufacturing & Processing
  Maintains safety logic for exothermic reaction controls, toxic gas detection systems, and emergency ventilation interlocks, protecting personnel and assets in batch and continuous process operations.
• Water Treatment & Municipal Infrastructure
  Ensures continuous operation of chlorine dosing safety controls, pump protection systems, and SCADA backup power in critical water and wastewater treatment facilities serving public health needs.

Technical Specifications & Selection Guide

To ensure optimal performance and compatibility, please review the following technical parameters. Our engineering team can assist with system-specific requirements and multi-unit configurations.

Selection Recommendations: When planning battery replacement, consider the following factors: current battery installation date (check controller maintenance records), ambient temperature conditions in the control cabinet, criticality of the safety function (SIL level requirements), and site maintenance schedules. For systems operating in extreme temperatures or high-vibration environments, consult with our application engineers to verify suitability. We recommend maintaining spare batteries on-site for critical safety systems to minimize downtime during scheduled or emergency replacements.

Installation, Maintenance & Service Support

Delivery & Lead Time: Standard OEM batteries are typically available from stock with 3-5 business day shipping. For bulk orders or project-specific requirements, please contact our sales team for expedited delivery options and volume pricing.

Warranty & Quality Assurance: All S9185FA battery packs are covered by a 12-month manufacturer warranty from date of shipment, protecting against defects in materials and workmanship. Each unit undergoes factory testing and quality verification before dispatch.

Technical Documentation: Complete product documentation is provided, including installation instructions, safety data sheet (SDS), compatibility matrix with SSC50D firmware versions, and disposal/recycling guidelines in compliance with local environmental regulations.

Installation & Replacement Guidance: Battery replacement is a straightforward procedure requiring basic hand tools and adherence to lockout/tagout (LOTO) procedures. Detailed step-by-step instructions are included with each shipment. For first-time installations or complex system configurations, remote technical support and on-site commissioning assistance are available (subject to location and service agreement).

Disposal & Environmental Compliance: Lithium batteries must be disposed of in accordance with local hazardous waste regulations. We provide guidance on proper recycling channels and can facilitate battery take-back programs for large-scale replacements in select regions.

Frequently Asked Questions (FAQ)

Q: How do I know when the Yokogawa S9185FA battery needs replacement in my SSC50D controller?
A: The SSC50D controller typically provides a low battery alarm indication on the front panel display and through the system diagnostics interface. Additionally, Yokogawa recommends proactive replacement every 5 years regardless of alarm status to maintain SIL 3 integrity. Check your controller's maintenance manual for specific alarm codes and replacement procedures.

Q: Can this battery be used with other Yokogawa safety controllers or third-party systems?
A: The S9185FA is specifically designed and certified for use with Yokogawa SSC50D safety system controllers. Using it with non-specified equipment may void safety certifications, compromise SIL ratings, and create warranty issues. For other controller models, please consult the equipment's parts list or contact our technical team for compatible battery options.

Q: What is the shelf life of the S9185FA battery if kept as a spare?
A: When stored in original packaging at room temperature (15-25°C) and low humidity, the S9185FA maintains over 90% of its capacity for 10+ years due to the extremely low self-discharge characteristics of lithium-thionyl chloride chemistry. However, we recommend rotating spare inventory every 3-5 years and using FIFO (first-in, first-out) practices for optimal performance.

Q: Are there any special handling or safety precautions when installing this lithium battery?
A: Yes. Always follow lockout/tagout procedures before opening the controller enclosure. Avoid short-circuiting the battery terminals, do not attempt to recharge (this is a primary, non-rechargeable battery), and never expose to fire or temperatures above 85°C. Wear appropriate PPE and ensure proper ventilation. Refer to the included safety data sheet (SDS) for complete handling instructions.

Q: Does the S9185FA battery support hot-swap replacement without shutting down the safety controller?
A: The SSC50D controller design typically includes capacitor backup that allows brief battery replacement without losing controller memory or requiring a full restart. However, specific hot-swap capability depends on your controller firmware version and system configuration. Consult your SSC50D operation manual or contact Yokogawa technical support to confirm hot-swap procedures for your specific installation.

Q: What certifications and compliance standards does this battery meet for use in hazardous area installations?
A: The S9185FA is designed for use within Yokogawa SSC50D controllers that may be installed in hazardous areas. The battery itself inherits the area classification rating of the controller enclosure (typically suitable for Zone 2/Division 2 when properly installed). For specific ATEX, IECEx, or NEC 500 compliance questions related to your installation, please provide your area classification requirements and we can confirm suitability.

Request Technical Support & Quotation

For detailed application engineering support, compatibility verification, or project-specific pricing, please provide the following information to our technical sales team:

• Project name and end-user facility details
• Current SSC50D controller model and firmware version
• Quantity required (immediate and projected annual usage)
• Installation environment (temperature range, hazardous area classification)
• Delivery timeline and destination location
• Any specific compliance or documentation requirements

Our safety system specialists will respond within 24 hours with tailored recommendations, technical documentation, and competitive pricing for single units or volume orders.

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