SIMATIC S7-400, Backup battery 3.6 V/2.3 AH for PS 405 4 A/10 A/20 A and PS 407 4 A/10 A/20 A
Category: SIEMENS Simatic Control Systems
Specifications
SKU
6ES7971-0BA00
Details
The Siemens 6ES7971-0BA00 is a genuine, industrial-grade lithium backup battery explicitly engineered for the SIMATIC S7-400 programmable logic controller (PLC) automation platform. Its primary function is to preserve critical CPU memory data, programming logic, and configurations during system maintenance or power failures, completely eliminating costly reconfiguration downtime.
Key Technical Specifications
- Voltage & Capacity: Rated at 3.6 V with a capacity of 2.3 Ah (approx. 2300 mAh).
- Battery Chemistry: Non-rechargeable Lithium Thionyl Chloride (Li-SOCl2), utilizing a standard "AA" size form factor.
- Weight: Extremely lightweight at approximately 25 grams.
- Reusability: Designed as a single-use (primary) battery.
Hardware Compatibility
This backup battery is highly targeted and plugs directly into specific power supply (PS) modules within the S7-400 rack system. It is natively compatible with:
- DC Power Supplies: PS 405 (rated at 4 A, 10 A, and 20 A outputs).
- AC Power Supplies: PS 407 (rated at 4 A, 10 A, and 20 A outputs).
Critical Engineering Note
Because this battery relies on Lithium Thionyl Chloride technology, a microscopic passivation film naturally develops over long storage intervals. This passivation layer can occasionally trigger a false "Battery Error" message when you first fire up your PLC power supply module. However, Siemens S7-400 power supply units feature integrated circuitry designed to safely burn off and clear this passivation film automatically shortly after startup.
Are you looking to buy a replacement for an active machine fault, or are you stocking up on preventative maintenance spares for your inventory?
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