&RQILJXULQJ
The diagram illustrates an S7-300 configuration with grounded reference potential
(implemented with a jumper)
1
Figure 5-7 S7-300 configuration with grounded reference potential (CPU 313 – 318-2 DP)
1
The removable jumper
2
The grounding bus cable
3
The reference potential of the CPU interconnection
4
Rail
1RWH
If you wish to install an S7-300 with grounded reference potential, you must NOT
remove the jumper from the CPU.
,QVWDOOLQJ WKH 6 ZLWK IORDWLQJ UHIHUHQFH SRWHQWLDO
H[FHSW IRU &38 ,)0
'HILQLWLRQ
If you install an S7-300 with ungrounded reference potential, any interference
currents that occur are dissipated via an RC system to the ground conductor/local
ground integrated into the CPU.
1RWH
Floating potential installation of an S7-300 with CPU 312 IFM or CPU 31xC is not
possible.
5-20
M
M
L +
L +
M
M
2
7KH GLDJUDP LOOXVWUDWHV XQGHU QXPEHU
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
1M
<100 nF
3
4
A5E00203919-01