Configuring - Siemens CPU 313C Hardware And Installation Manual

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After you have mounted and wired your S7-300, we recommend you check all
previous steps once again.
The checklist tables below are a guide for your examination of the S7-300. They
also provide cross-references to chapters containing further information on the
relevant topic.
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Are the rails mounted firmly to the wall, in the frame or in
the cabinet?
Have you maintained free space required?
Are the cable ducts installed properly?
Is the air convection OK?
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Have you established a low-impedance connection
(large surface, large contact area) to local ground?
Are all racks (rails) properly connected to reference
potential and local ground (electrical connection or
isolated operation)?
Are all grounding points of electrically connected
modules and of the load power supply units connected
to reference potential ?
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Are all modules properly inserted and screwed in?
Are all front connectors properly wired, plugged, screw-
tightened or latched to the correct module?
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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
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