Function, Power connection, Power supply modules 3-28 – Siemens Simatic S7-400 User Manual
Page 108: Fmr pushbutton (failure message reset), Standby switch (does not cut off mains), Switches batt. indic. 2 batt, off, 1 batt, Battery compartment, Pin plug-in power connector, Fixing screw, Fixing screws

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