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Siemens SIMATIC S7 3.6 V backup battery For S7-300 CPUs - 6ES7971-1AA0 — RealPars
SIMATIC S7-300, CPU 315-2DP 1998-03-15... 1999-05-01 SIMATIC S7-300, CPU 315-2 DP CPU WITH INTEGRATED 24 V DC POWER SUPPLY, 64 KBYTE WORKING MEMORY 2ND INTERFACE DP-MASTER/SLAVE 16-Bit Single-Chip Microcontroller ...
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