7 pin assignments of the 721 connecting cable – Siemens Simatic S7-400 User Manual
Page 395
IM 463-2
7-11
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
7.7
Pin Assignments of the 721 Connecting Cable
Table 7-6
Assignment of the Connecting Cable 721
ННННННННННН
ННННННННННН
ННННННННННН
34
50
17
1
ННННННННННН
ННННННННННН
ННННННННННН
34
50
17
1
Connector
50-Pin Contact
Bundle
Ident. Sheath
Identification Foil
Core Color
Connector
50-Pin Contact
20
white
20
21
brown
21
4
green
4
5
1
red
yellow
5
18
1
No. 16
red
gray
18
19
pink
19
2
blue
2
3
red
3
24
white
24
25
brown
25
8
green
8
9
2
green
yellow
9
22
2
No. 17
green
gray
22
23
pink
23
6
blue
6
7
red
7
26
white
26
27
brown
27
10
green
10
11
3
yellow
yellow
11
42
3
No. 18
yellow
gray
42
43
pink
43
44
blue
44
45
red
45
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