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S5-115U Manual
Communications Link between a CPU 944 and a CP 525
CPU 944
TTY IN+
9
TTY IN -
2
M
15
TTY OUT -
7
20 mA
11
TTY OUT+
6
M
1, 8
ext
15-pin subminiature D
connector
Figure 12-16. Communications Link between a CPU 944 and a CP 525
Communications Link between a CPU 944 and a CP 523
CPU 944
20 mA
11
TTY OUT+
6
TTY OUT -
7
M
5
20 mA
13
TTY IN+
9
TTY IN -
2
M
12
M
1,8
ext
15-pin subminiature D
connector
Figure 12-17. Communications Link between a CPU 944 and a CP 523
The peers in the link are connected via a direct line (<100 m).
Cable requirements:
We recommend SIMATIC cable 6ES5 707-1AA00.
EWA 4NEB 811 6130-02b
Schirm
• 4-wire
• shielded
• cross-section 0.14 mm
Communications Capabilities
CP 525
TTY OUT -
19
21
M
TTY IN -
14
13
TTY IN+
TTY OUT+
10
20 mA
12
M
1
ext
25-pin subminiature D
connector
CP 523
TTY IN+
6
8
TTY IN -
TTY OUT+
10
12
TTY OUT -
24, 25
M
ext
25-pin subminiature D
connector
2
(26 AWG)
12-39
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