Siemens SIMATIC S7-300 Reference Manual page 304
Programmable logic controllers module data
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- Manual (676 pages) ,
- Installation and operating manual (356 pages) ,
- Hardware and installation manual (256 pages)
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Analog Modules
Terminal assignment and block diagram of the SM 331; AI 8 x 14 bit High Speed
Group error display – red
SF
Figure 4-37
Terminal assignment and block diagram of the SM 331; AI 8 x 14 bits High Speed
4-98
Multiplexer
Internal
supply
ADC
Isolation
SF
Backplane
bus
interface
Voltage measurement
Current measurement
L+
1
24V
Meas. range
2
module
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
2
M
0
Programmable Logic Controllers S7-300 Module Data
M
+
0
*
M
CH0
0
M
+
1
M
*
CH1
1
M
+
2
*
M
CH2
2
M
+
3
M
–
CH3
3
M
ana
M
ana
M
+
4
M
*
CH4
4
M
+
5
*
M
CH5
5
M
+
6
*
M
CH6
6
M
+
7
*
M
CH7
7
A5E00105505-03
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