Installation Guidelines
S5-100U
The common chassis grounding connection makes it possible for you to use reasonably priced non-
floating I/Os.
These modules function according to the following principles.
•
Input modules
- The ground line, line M (control circuit chassis) is the reference potential. A voltage drop V
1
on line affects the input signal level
V
I
.
•
Output modules
- Terminal 2 (M)
of the terminal block is the reference potential. A voltage drop
V
2
on the
line raises the chassis potential of the output driver and thus reduces the resulting control
voltage V
CV
.
Figure 3-22 shows a simplified connection of the S5-100U with a non-floating external I/O.
Figure 3-22. Simplified Representation of a Non-Floating I/O Connection
+9 V
Data
GND
a a a a a a a
a a a a a a a
a a a a a a a
a a a a a a a
a a a a a a a
CPU
a a a a a
a a a a a
a a a a a
a a a a a
a a a a a
V
1
a a a a
a a a a
a a a a
a a a a
a a a a
V
2
a a a
a a a
a a a
a a a
a a a
V
I
a a a
a a a
a a a
a a a
a a a
1
a a a
a a a
a a a
a a a
a a a
2
a a a a a a
a a a a a a
a a a a a a
a a a a a a
a a a a a a
V
CV
a a a a
a a a a
a a a a
a a a a
a a a a
a a a a
a a a a
a a a a
a a a a
a a a a
a a a a a
a a a a a
a a a a a
a a a a a
a a a a a
L+
a a a
a a a
a a a
a a a
a a a
M
a a a a a
a a a a a
a a a a a
a a a a a
a a a a a
a a a a a
a a a a a
a a a a a
L+
M
a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a
24 V DC supply
3-26
EWA 4NEB 812 6120-02b
Содержание SIMATIC S5-100U
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Страница 505: ...B Dimension Drawings EWA 4NEB 812 6120 02b ...
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Страница 523: ...D Information for Ordering Accessories EWA 4NEB 812 6120 02b ...
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Страница 531: ...E Reference Materials EWA 4NEB 812 6120 02b ...
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Страница 535: ...F Siemens Addresses Worldwide EWA 4NEB 812 6120 02b ...
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Страница 543: ...Index EWA 4NEB 812 6120 02b ...
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