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The S9129FA is a dedicated backup battery pack configured by Yokogawa for its CENTUM series Distributed Control Systems. In continuous industrial production processes, control logic, field configurations, parameters, and event logs run within Distributed Control System controllers. This data is stored in the controller's volatile Random Access Memory.
Effectively suppresses natural power loss and ensures immediate response of equipment in long-term standby mode
It has excellent resistance to load fluctuations, dynamically adjusting and maintaining a stable voltage supply
Unaffected by extreme temperature variations from -20 °C to +70 °C, it can operate stably in both high-temperature server racks and frigid data centers
The S9129FA is equipped with dual-core insulated leads and an original polarized foolproof connector in field applications, which completely eliminates the risk of short circuits caused by reverse polarity connections due to obstructed vision. The system supports full online hot-swapping replacement, allowing technicians to perform on-site replacement without interrupting process control as long as the external main power supply module of the controller remains normal, but the new battery must be plugged into place within five minutes after removing the old battery to prevent data eradication due to the depletion of residual power.
In addition, the lifespan of this battery is closely related to the operating temperature, with an expected lifespan of three years in a standard environment less than or equal to 30 degrees Celsius, which shortens to 1.5 years when the temperature rises between 35 degrees Celsius and 40 degrees Celsius. The control system features self-diagnostic capabilities and triggers a Battery Low system alarm on the Human Interface Station immediately once it detects that the battery voltage drops below the safety threshold, prompting management personnel to arrange spare parts replacement in a timely manner.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Yokogawa S9129FA Battery Pack Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Thermal Power Generation
In boiler combustion control systems and turbine supervisory instrumentation systems, it maintains critical logic interlock parameters and real-time operational configurations during power failures, preventing unplanned generator shutdowns due to data loss.
Petroleum Refining
Used in control stations for crude distillation and catalytic cracking units, it powers the Random Access Memory during total plant blackouts to protect complex temperature and pressure tuning curves.
Coal Chemical Industry
In process control for coal gasifiers and ammonia synthesis units, it maintains the logical state of safety interlock systems, ensuring the safe execution of emergency shutdown procedures during external power interruptions.
Iron and Steel Smelting
During power outages in blast furnace ironmaking and converter steelmaking automation control systems, it locks core batching parameters and material balance data, ensuring continuous production flows upon power restoration.
Rail Transit Power Supply Systems
In power monitoring systems of metro or intercity railway substations, it preserves circuit breaker interlock logic and historical event logs, preventing the dispatch center from losing control during power failures.
Hydroelectric Power Generation
Used in modules of hydro-generator excitation control systems and governing systems, it maintains core regulation parameters during fault switchovers such as lightning strike power failures, safeguarding grid stability.
The S9129FA battery pack requires strict monitoring of ambient temperature and periodic preventive replacement, with a design life of three years in environments less than or equal to 30 degrees Celsius, which cuts in half to 1.5 years when the temperature rises between 35 and 40 degrees Celsius. Prompt troubleshooting is mandatory when the system triggers a Battery Low alarm, and the spare part replacement must be completed before the next power outage.
This component supports full online hot-swapping, utilizing a polarized foolproof connector to prevent short circuits from reverse polarity connections during operation, and the new battery must be plugged into place within five minutes after removing the old battery to prevent memory eradication due to the depletion of residual power in the controller's volatile memory.
Alternative Names
Alternative Names
S9I29FA
Technical notes
Technical notes
The S9129FA is an industrial Ni-MH backup battery pack (2.4V/1100mAh) for Yokogawa CENTUM CS 1000/CS 3000/VP controllers. It delivers up to 72 hours of data backup for volatile RAM during power failures. Built for harsh control cabinet environments, it features low self-discharge, steady voltage, and a −20 °C to +70 °C operating range. It supports online hot-swapping and offers a 3-year design life below 30 °C to ensure uninterrupted DCS operations.
The S9129FA is an industrial-grade Nickel-Metal Hydride (Ni-MH) backup battery pack dedicated to Yokogawa Distributed Control Systems (DCS), used to protect system data during power failures.
Which Yokogawa systems is the S9129FA compatible with?
It is primarily compatible with Yokogawa's CENTUM CS 1000, CENTUM CS 3000, and CENTUM VP control systems.
What is the core function of the S9129FA?
When the main power of the DCS controller fails, it powers the volatile memory (RAM) to prevent the loss of control strategies and real-time operational configurations.
How to install and use the S9129FA on-site?
Connect its dedicated polarized plug to the corresponding socket on the DCS controller's CPU card, and secure it inside the designated battery slot.
How does the S9129FA operate during normal system runtime?
When the system power is normal, the DCS applies a trickle charge to the S9129FA to keep it fully charged and ready, utilizing its low self-discharge characteristic to maintain energy.
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