Siemens SIMATIC S7-300 - Manual (Page 31)

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Supplying power to the CPU 312C
1. Connect the supply cable to the supply system.
Warning
Unanticipated operation can
cause death or personal
injury!
Death or serious bodily injury
and damage to machinery
and equipment can occur if
you do not observe the follow-
ing safety precautions.
Always put the CPU in STOP
before turning on power.