6ES7971-0BA00
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
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3RU2916-3AA01
stand-alone assembly support for 3RU21/3RB30/3RB31/3RR2 Size S00 Stand-alone installation Main circuit: Screw Auxiliary circuit: —
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