Siemens CPU 312C Hardware And Installation Guide

&RQILJXULQJ
S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
5-18 A5E00105492-03
 ,QVWDOOLQJDQ6ZLWK*URXQGHG5HIHUHQFH3RWHQWLDO
,QWURGXFWLRQ
In an S7-300 configuration with grounded reference potential occurring interference
current is dissipated to the ground conductor/ to ground. A grounding slide contact
is used for this except with CPU 31xC.
1RWH
Your CPU already is supplied complete with a grounded reference potential,
so if you wish to install an S7-300 with grounded reference potential, then you do
not need to make any changes to your CPU.
*URXQGHGUHIHUHQFHSRWHQWLDORIWKH&38[
The diagram illustrates an S7-300 configuration with ungrounded reference
potential.
M
L+
M
10M
<100 nF
M
1
3
2
Figure 5-7 CPU with grounded reference potential (as supplied)
7KHGLDJUDPLOOXVWUDWHVXQGHUQXPEHU
 Grounding slide contact in grounded state
 Ground of internal CPU circuitry
 Rail
1RWH
If you configure an S7-300 with
g
rounded reference potential,
y
ou must not pull out
the grounding slide contact.

Siemens CPU 312C Specifications

General

Brand	Siemens
Model	CPU 312C
Category	Processor
Language	English