Siemens Simatic S7-400 - Manual (Page 317)

Analog Modules
5-101
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Terminal Assignment Diagram of the SM 431; AI 16 x 13 Bit
Voltage measurement
Current measurement
M1+
M2–
M3–
M4–
M5–
M6–
M7–
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
L+
M0+
M0–
M1–
M2+
M3+
M4+
M5+
M6+
M7+
M
M8–
M9–
M8+
M9+
M10–
M11–
M10+
M11+
M12–
M13–
M12+
M13+
M14–
M15–
M14+
M15+
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15
Word 0
Word 4
Word 8
Word 12
Word 16
Word 20
Word 24
Word 28
Word 2
Word 6
Word 10
Word 14
Word 18
Word 22
Word 26
Word 30
L+
M
29
30
31
32
33
34
35
36
37
39
40
41
42
43
44
45
46
47
48
38
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Tr
Tr
Tr
Tr
Tr
Tr
Tr
Tr
Figure 5-34 Terminal Assignment Diagram of the SM 431; AI 16 x 13 Bit