Siemens SIMATIC S7-400 Reference Manual page 305

Circuit diagram for SM 431; AI 8 x 16 bit
Figure 5-39
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
5.25 Analog input module SM 431; AI 8 x 16 Bit (6ES7431-7KF00-0AB0)
Optional connector
(screw-type)
INTF
1
EXTF
2
3
4
5
6
7
8
9
0
10
11
12
13
14
1
15
16
17
18
19
2
20
A
21
22
23
24
3
25
V
26
27
28
29
4
30
V
31
32
33
34
5
35
A
36
37
38
39
6
40
Tr
41
42
43
44
7
45
Tr
46
47
48
6ES7492-1AL00-0AA0
Circuit diagram for SM 431; AI 8 x 16 bit
Connector with
temperature reference
M0+
M0+
R0
M0-
M1+
M1+
R1
M1-
M2+
M2+
V
R2
M2-
M3 +
M3 +
V
R3
M3-
M4+
M4+
A
R4
M4-
M5+
M5+
A
R5
M5-
M6+
M6+
Tr
R6
M6-
M7+
M7+
Tr
R7
M7-
6ES7431-7KF00-6AA0
Analog modules
Thermocouples
Voltage measurement
Current measurement
M0+
M0+
Word 0
CH0
R0
M0-
M1+
M1+
CH1 Word 1
R1
M1-
M2+
M2+
Word 2
CH2
R2
M2-
M3 +
M3 +
Word 3
CH3
R3
M3-
M4+
M4+
CH4 Word 4
R4
M4-
M5+
M5+
Word 5
CH5
R5
M5-
M6+
M6+
Word 6
CH6
R6
M6-
M7+
M7+
CH7
Word 7
R7
M7-
305