Siemens Simatic S7-400 - Manual (Page 307)

Analog Modules
5-91
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Terminal Assignment Diagram of the SM 431; AI 8 14 Bit
Voltage measurement
Current measurement Resistance measurement
M1+
M2–
M3–
M4–
M5–
M6–
M7–
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
L+
V
A
A
M
Tr
Tr
L+
M0+
M0–
M1–
M2+
M3+
M4+
M5+
M6+
M7+
M
M0+
M0–
IC0+
IC0–
M1+
M1–
IC1+
IC1–
M2+
M2–
IC2+
IC2–
M3+
M3–
IC3+
IC3–
CH0
CH2
CH4
CH6
V
MANA
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
Word 0
Word 2
Word 4
Word 6
Word 8
Word 10
Word 12
Word 14
Word 0
Word 4
Word 8
Word 12
Figure 5-31 Terminal Assignment Diagram of the SM 431; AI 8 x 14 Bit