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Hardware and Connections
Connections to
Plug-In Terminals
2-42
12 terminal
c
b
a
1
2
a
b
c
b
a
3
4
a
b
c
b
a
5
6
a
b
c
b
a
7
8
a
b
c
b
a
9
10
a
b
c
b
a
11
12
a
b
Figure 2-40
Schematic diagram of the plug-in terminal blocks
Connections to plug-in terminals are made with pin connectors.
There are two versions of pin connectors (Figure 2-13):
Version 1: 2-pin connector
Version 2: 3-pin connector
Figure 2-41
2-pin connector and 3-pin connector
Ordering information for the pin connectors is provided in Section 1.1 of Appendix A.
The design of the pin connectors is such that only correct connections can be made.
For example, the design of the 2-pin connector allows connection only to pins "a" and
"b". An erroneous connection to pins "b" and "c" is excluded due to the construction of
the pin connectors.
The pin connectors snap in to the plug-in terminals. The connectors can be removed
without tools.
Signal connection
Common connection
Shielding connection
c
Common connections, group 1
c
looped together
c
c
c
c
Common connections, group 2
looped together
Shielding connections
looped together
a
b
18 terminal
c
b
a
1
2
a
b
c
b
a
3
4
a
b
c
b
a
5
6
a
b
c
b
a
7
8
a
b
c
b
a
9
10
a
b
c
b
a
11
12
a
b
c
b
a
13
14
a
b
c
b
a
15
16
a
b
c
b
a
17
18
a
b
a
b
c
7SA6 Manual
C53000-G1176-C133-1
c
c
c
c
c
c
c
c
c
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