Siemens SIMATIC S7-300 Reference Manual page 360
Programmable logic controllers module data
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Also See for SIMATIC S7-300:
- Manual (676 pages) ,
- Installation and operating manual (356 pages) ,
- Hardware and installation manual (256 pages)
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Analog Modules
Terminal Connection Diagram and Block Diagram of the
Fault indicator – red
SF
Figure 4-49
Module View and Block Diagram of the Analog Input Module SM 331; AI 2 x 12 bits
The input resistances depend on the measuring range selected (refer to the
technical specifications for the module).
4-154
Thermocouples,
Voltage measurement
Current measurement
Current
Internal
Multi-
source
supply
plexer
Internal
T
compensation
External
+
compensation
None
ADC
Isolation
SF
Backplane
bus
interface
SM 331; AI 2 x 12 bits
L+
24V
M
Meas. range
module
M
M
M
Comp
M
Programmable Logic Controllers S7-300 Module Data
Resistance test
M
0 + CH0
0 +
CH0
M
0*
0*
I
1 +
CH1
C0 +
I
C0*
1*
Comp +
Comp–/ Mana
A5E00105505-03
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