Siemens SIMATIC S5-115U User Manual page 90

Simatic s5 series cpu 941-7ub11 cpu 942-7ub11 cpu 943-7ub11 and cpu 943-7ub21 cpu 944-7ub11 and cpu 944-7ub21
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Installation Guidelines
Set the jumpers on X12 to adapt the cable length for distributed connection.
When you set the jumpers on X12, use the longest link connected to interface X3 or X4 to
determine the setting.
If you use IPs and CPs on the EU, you must set the longest total length, regardless of the length
of the connection line.
7
X12
5
3
1
7
X12
5
3
1
7
X12
5
3
1
7
X12
5
3
1
Set the jumpers on X14 and X15 as follows for the IM 304-3UA1/IM 314 distributed con-
nection:
3
2
X14
3
2
3
2
X15
3
2
3-24
8
The maximum total length of the distributed connection is
100 m (330 ft.) per interface.
6
4
2
8
Total length between 100 m (330 ft.) and 250 m (820 ft.)
6
4
2
8
Total length between 250 m (820 ft.) and 450 m (1500 ft.)
6
4
2
8
Total length between 450 m (1500 ft.) and 600 m (2000 ft.)
6
4
2
1
The PEU signal (I/Os not ready) is not evaluated in the ISTACK.
1
The PEU signal (I/Os not ready) is evaluated in the ISTACK.
Note: When power is turned on, cold restart (RN-ST-RN) is also
necessary.
1
The PEU signal is output in the ISTACK if one interface reports
"Not ready".
1
The PEU signal is output in the ISTACK if both interfaces
report "Not ready".
S5-115U Manual
EWA 4NEB 811 6130-02b

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