Application Scenarios:

In a chemical processing plant’s DCS, the ABB TA951F​ battery is installed in the AC 900F controller rack. During a planned maintenance shutdown or an unexpected power failure, the main 24V DC supply is cut off. The TA951F instantly takes over, supplying a low current to the CPU’s static RAM (SRAM). This prevents the loss of running setpoints, batch recipe data, and device statuses. When power is restored, the controller resumes operation exactly where it left off, avoiding the need for a full program download and manual parameter re-entry, which could take hours.

 

 

Parameter:

Main Parameters	Value/Description
Product Model​	ABB TA951F​
ABB Order Code​	3BDH001030R0001​
Manufacturer​	ABB
Product Type​	RAM Buffering / Memory Backup Battery
Battery Chemistry​	Lithium Metal (Li)​ – Non-rechargeable
Nominal Voltage​	3 V DC​
Typical Capacity​	1200 mAh​ (approx. 950-1200 mAh range)
Battery Size​	2/3A Size​ (industry standard)
Physical Dimensions​	40 mm × 17 mm × 17 mm​ (L × W × H)
Weight​	0.014 kg – 0.02 kg​ (very lightweight)
Housing​	Sealed plastic pack with cable/connector
Operating Temp.​	-20°C to +70°C​ (industrial grade)
Storage Temp.​	-40°C to +85°C
Replacement Cycle​	5 – 10 years​ (typical service life)
Safety/Dangerous Goods​	UN3090, Class 9​ (Lithium metal battery)

 

 

 

Technical Principles and Innovative Values:

The ABB TA951F​ solves the critical challenge of controller “amnesia”​ during power cycles, offering key advantages over generic coin cells or unmonitored batteries.

• Innovation Point 1: Hot-Swap Capability for Zero Downtime.​ Unlike many internal batteries that require a full controller shutdown for replacement, the TA951F is designed for hot-swap replacement​ in supported configurations. This allows maintenance engineers to replace a depleted battery during normal system operation without stopping the control process, maximizing plant availability and eliminating production losses associated with preventive maintenance.
• Innovation Point 2: Advanced Battery Health Monitoring.​ The module works in conjunction with the CPU’s firmware to provide predictive failure warnings. The system continuously monitors the battery voltage and can trigger a “Battery Low” alarm typically 14 days in advance​ of actual failure. This gives plant personnel a critical window to schedule a replacement before a power event causes irreversible data loss, transforming maintenance from reactive to predictive.
• Innovation Point 3: High-Temperature Industrial Reliability.​ Using a lithium metal chemistry​ (non-rechargeable) specifically rated for industrial temperature ranges (-20°C to +70°C), the TA951F offers superior longevity and leakage resistance compared to standard consumer-grade batteries. Its sealed construction prevents corrosion of the sensitive CPU board, which is a common failure point in harsh plant environments where humidity and temperature fluctuations are common.