Further information for Siemens SIEM backup battery 3 6V/2 4A/10A/20A PS 407 4A/10A/20A - 6ES7971-0BA02
SIMATIC S7-400, buffer 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 for extended temperature range Accessories for SIMATIC S7-400