Hardware and Connections
2-10
7SA522 Manual
C53000-G1176-C119-2
2.1.3
Connections to Plug-In Terminals
Plug-in terminals are only available for voltage connections. Current connections are
made with screw terminals on all 7SA522.
Terminal Blocks for
Voltage
Connections
There are two versions of plug-in terminal blocks. They are shown in Figure 2-10.
Figure 2-10
Terminal blocks of plug-in terminals for voltage connections — rear view
The system of numbers and letters used to designate the plug-in terminals is illustrat-
ed in Figure 2-11.
Figure 2-11
Correlation between plug-in terminals and connection numbers/letters
Each plug-in terminal forms a complete set of connections that consists of three pins
arranged as follows:
Pin a:
Signal connection
Pin b:
Common connection
Pin c:
Shielding connection
The signal pins are the only terminal pins that are directly connected to the internal
printed circuit boards of the 7SA522. Depending on the version of the terminal block,
18 or 12 signal connections are provided. Refer to Figure 2-12.
There are two isolated groups of common pins. Within a group the pins are inter-con-
nected as shown in Figure 2-12. The common pins “b” are not connected to the boards
18 terminal
12 terminal
9
7
5
3
1
a
b
c
2
4
6
8
10
12
14
16
18
a
b
c
13
11
15
17
9
7
5
3
1
a
b
c
2
4
6
8
10
12
a
b
c
11
1
a
b
c
2
12
a
b
c
Plug-in terminal 2
Plug-in terminal 1
Summary of Contents for siprotec 7SA522
Page 20: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 64: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 89: ...SIPROTEC 4 Devices 4 25 7SA522 Manual C53000 G1176 C119 2 Figure 4 20 CFC Logic example ...
Page 408: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 456: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 516: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 620: ...Appendix B 48 ...
