Installation manual

Starting Up
6-3
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
6.2 Checks Prior to Switching On for the First Time
Checks Prior to Switching On for the First Time
After installing and wiring your S7-400, it is advisable to check the steps carried out
so far, before switching on for the first time.
Table 6-1 contains a guide in the form of a checklist for your S7-400, and refers to
the chapters containing additional information on the subject.
Table 6-1 Checklist to be Used Before Switching On for the First Time
Points to be Checked
See
Installation
Manual
Chapter
See Reference
Manual
“Module
Specifications
” Chapter
See Reference
Manual “CPU
Data” Chapter
Racks
Are the racks secured on the wall, in
the frame or cabinet?
2
Have the necessary clearances been
allowed?
2
Are cable ducts or fan subassemblies
correctly installed?
2
Is the ventilation in order? 2
Grounding and Chassis Ground Concept
Is there a low-impedance connection
(large surface, large-area contact) to
the chassis ground?
2
On all racks, is the connection bet-
ween reference ground and chassis
ground correct (metallic connection or
ungrounded operation?)
4
Are all grounds of the non-isolated
ded modules and the grounds of the
load current power supplies connec-
ted to the reference points?
2
Mounting and Wiring Modules
Are all modules correctly inserted and
screwed on?
2
Are all front connectors correctly wi-
red, plugged into the right modules,
and screwed on?
4
Are any necessary cable ducts or fan
subassemblies fitted correctly?
2