Siemens Simatic S7-300 Technical Data Manual page 142

Technical data of CPU 31xC
6.6 Technical data of the integrated I/O
CPU 313C/314C-2: Pin-out of the integrated AI/AO and DI (connector X11)
Standard
AI (Ch0)
AI (Ch1)
AI (Ch2)
AI (Ch3)
PT 100 (Ch4)
AO (Ch0)
AO (Ch1)
1) CPU 314C-2 only
Block diagram of integrated digital/analog I/O of CPUs 313C/314C-2
R
AO0
AO1
6-32
1)
Positioning
V
I
C
V
I
C
V
I
C
V
I
C
Control
V
A output 0
V
A
AI/A0
1
2
V
AI
3
A
CH0
4
AI0
5
V
AI
6
A
7 CH1
AI1
8
V
AI
9
A
10 CH2
AI2
11
V
AI
12
A
13 CH3
AI3
14
AI
15
PT100
AI4
16
U A0
V
17
I CH0
A
18
U A0
V
19
I CH1
A
20
M
ANA
X11
1
2
DI+2.0
3 PEWx+0 DI+2.1
4 DI+2.2
5 DI+2.3
6
DI+2.4
PEWx+2
7
DI+2.5
8
DI+2.6
PEWx+4
9 DI+2.7
4M
10
11
12 PEWx+6
13
14
PEWx+8
15
16
PAW x+0
17
18
PAW x+2
19
20
M
ANA
Controller
Interrupt input
Standard DI
21
22
X X
23
X X
24
X X
25 X X
26
X X
27
X X
28
X X
29
X X
30
31
32
33
34
35
36
37
38
39
40
8DI
21
22
23
24
25
26
27
28
29
30
4M
31
32
33
34
35
36
37
38
39
40
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05