Siemens Simatic M7-400 Reference Manual page 396

IM 463-2
Table 7-6 Assignment of the Connecting Cable 721, continued
Connector
50-Pin Contact Ident. Sheath
28
29
12
13
46
47
30
31
34
35
36
37
38
39
40
41
48
49
14
15
32
33
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7-12
Bundle
Identification Foil
4 4
brown brown
No. 19
5 5
black black
No. 20
6 6
blue blue
No. 21
Shield
S7-400, M7-400 Programmable Controllers Module Specifications
Core Color Connector
50-Pin Contact
white 28
brown 29
green 12
yellow 13
gray 46
pink 47
blue 30
red 31
white 34
brown 35
green 36
yellow 37
gray 38
pink 39
blue 40
red 41
white 48
brown 49
green 14
yellow 15
gray 32
pink 33
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