Backup batteries

AA-type, 2.3 Ah lithium backup batteries are used in the power supply modules of all SIPLUS PCS 7 automation systems in the S7‑400 series. Since lithium batteries are easily inflammable, more rigorous transport and storage regulations apply to them.

To avoid subjecting the automation systems to these more rigorous transport and storage regulations, the backup batteries must be ordered and delivered separately (Article No. 6ES7971-0BA00).

The following backup batteries are required depending on the configuration of the AS system:

• SIPLUS PCS 7 AS Single System with:
  • 1 power supply module: 2 units
  • 2 redundant power supply modules: 4 units
• SIPLUS PCS 7 AS Redundant System with:
  • 2 power supply modules: 4 units
  • 2 x 2 redundant power supply modules: 8 units