Siemens SIMATIC PLC 6AG1971-0AA00-7AA0 SIPLUS S7-400 BATTERY BOX PS 40    -25 ... +70 DEGREES C    WITH CONFORMAL COATING    BASED ON A5E00753961    BATTERIEBOX FOR ADDITIONAL    RAM-BUFFERING OF S7-400.    NOT INCLUDED IN SCOPE OF DELIVE    STANDARD LITHIUM CELL (MONO D) 6AG19710AA007AA0