Siemens Simatic S7-300 - Page 304

Analog Modules
4-98
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Terminal assignment and block diagram of the SM 331; AI 8 x 14 bit High Speed
M
3
–
M
ana
Group error display – red
Voltage measurement
Current measurement
M
0
+
M
0
*
M
1
+
M
ana
SF
Internal
supply
M
L+
Multiplexer Meas. range
module
ADC
Isolation
Backplane
bus
interface
SF
CH0
CH1
M
1
*
M
2
+
CH2
M
2
*
M
3
+
CH3
M
4
+
M
4
*
M
5
+
CH4
CH5
M
5
*
M
6
+
CH6
M
6
*
M
7
+
CH7
M
7
*
24V
1
2
3
4
5
6
7
9
8
10
11
12
13
14
15
16
17
18
19
2
0
Figure 4-37 Terminal assignment and block diagram of the SM 331; AI 8 x 14 bits High Speed