Siemens 6ES7-971-0BA00 Backup Battery

Overview

The Siemens 6ES7-971-0BA00 backup battery is the genuine SIMATIC S7 back-up battery that keeps a programmable logic controller’s internal RAM and real-time clock alive when mains power is removed. Rated at 3.6 V DC with a 2.3 Ah lithium thionyl chloride cell, it protects the loaded user program, data blocks, and hardware configuration of SIMATIC S7-300 and S7-400 CPUs, so a plant can be restarted after a power outage without reloading firmware, re-downloading logic, or losing time-stamped diagnostics. For facilities across the Sultanate of Oman and the wider GCC, where summer grid disturbances and maintenance shutdowns are routine, a genuine back-up battery is the difference between a clean restart and hours of recommissioning.

As a trusted supplier of Siemens products in Oman and the GCC, Seven Star LLC supplies the genuine Siemens 6ES7-971-0BA00 backup battery on request, with direct technical support. Every unit is sourced as an original Siemens article, packaged for long storage, and ready for dispatch to Muscat, Sohar, Salalah, Duqm, and across the Gulf.

Operating Principle

The SIMATIC S7 CPU keeps its loaded program and process image in internal random-access memory, which is volatile by nature. When the CPU loses its 24 V supply, that memory would normally be erased within a matter of minutes or hours. The backup battery supplies a small continuous retention current to the memory circuitry and the real-time clock, holding the program, data blocks, and system state for as long as the cell has charge.

The Siemens 6ES7-971-0BA00 uses lithium thionyl chloride chemistry, chosen for its high energy density, flat discharge voltage plateau, and extremely low self-discharge rate. That combination means the battery delivers a stable retention voltage across its entire service life and can be stored for years before use without significant loss of capacity. When the CPU is powered back up, the memory contents are read straight from RAM and the controller resumes with its configuration intact.

Engineering Design of the Siemens 6ES7-971-0BA00

The battery is a compact cylindrical lithium cell terminated with a two-pin plug that keys directly into the SIMATIC battery socket. On S7-300 CPUs the socket sits in the battery compartment behind the front cover; on S7-400 systems the battery mounts in the holder on the front panel of the CPU or of the power supply module. The polarized connector makes reversed installation physically impossible, and no tools are required at either location.

Every genuine unit carries the original Siemens order number 6ES7-971-0BA00 on its label, with production traceability to Siemens’ own quality system. The cell is manufactured to industrial tolerances for vibration, humidity, and cabinet temperature, and ships in Siemens original packaging that protects it during transport and long-term storage before commissioning.

Key Features

The Siemens 6ES7-971-0BA00 backup battery is specified for every maintenance inventory that touches SIMATIC S7 hardware. Its defining characteristics are:

• Genuine Siemens SIMATIC S7 spare part, identified by the original Siemens 6ES7-971-0BA00 order number for full traceability.
• 3.6 V DC, 2.3 Ah lithium thionyl chloride cell delivers reliable retention power over years of service.
• Retains the user program, data blocks, and hardware configuration in the CPU internal RAM during power-off.
• Keeps the CPU real-time clock running, preserving time stamps, event logs, and time-stamped diagnostics.
• Polarized two-pin plug installs directly into S7-300 battery compartments and S7-400 front-panel battery holders.
• Low self-discharge and a flat voltage plateau provide a long usable life and predictable replacement intervals.
• Compact cylindrical form factor fits inside the CPU housing with no tools, cabling, or additional hardware.
• Supplied by Seven Star LLC, a trusted supplier of Siemens products in Oman and the GCC, with genuine-article guarantee and local support.

Industrial Applications

S7-300 and S7-400 controllers are the workhorses of process automation across the Gulf, and the Siemens 6ES7-971-0BA00 backup battery protects the logic in every one of them. Oil and gas production facilities, power and water utilities, desalination plants, cement and steel lines, chemical processing units, and food and beverage plants in the Sohar and Salalah economic zones all rely on SIMATIC CPUs that must retain their programs through brownouts, scheduled shutdowns, and emergency trips.

Working closely with plant engineers in the region, Seven Star LLC distributes the genuine Siemens 6ES7-971-0BA00 backup battery throughout Oman and the GCC. Maintenance and reliability teams stock it alongside their S7 spares to guarantee that a power interruption never turns into a lost program or a long recommissioning, and our instrumentation division supports sizing, replacement planning, and express delivery for critical plant schedules.

Technical Specifications

The following table summarises the key parameters of the Siemens 6ES7-971-0BA00 backup battery:

Request a Quote for Siemens 6ES7-971-0BA00 Backup Battery

Request a formal quotation for the Siemens 6ES7-971-0BA00 backup battery through the Seven Star LLC RFQ portal, and our instrumentation division will confirm availability and lead time, delivery to Oman or any GCC destination, and current pricing. With fast quotation turnaround and technical support, we also provide the technical datasheet, genuine-article documentation, and application guidance for S7-300 and S7-400 backup replacement programs. Contact Seven Star LLC today to secure your spares inventory.

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