Siemens Simatic S7-400 User Manual
Page 293
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Analog Modules
5-77
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
5.19
Analog Input Module SM 431; AI 8
14 Bit;
(6ES7 431-1KF10-0AB0)
Characteristics
The analog input module SM 431; AI 8
14 Bit has the following features:
•
8 inputs for voltage/current measurement
•
4 inputs for resistance and temperature measurement
•
Unlimited measuring range selection
•
14-bit resolution
•
Particularly suitable for measuring temperatures
•
Temperature sensor types can be parameterized
•
Linearization of the sensor characteristic curves
•
Supply voltage 24 VDC required only for the connection of 2-wire transmitters
•
Analog section isolated from CPU
•
The maximum permissible common mode voltage between the channels and
between the channel and the central ground point is120 VAC
Block Diagram of the SM 431; AI 8
14 Bit
CH0
CH1
CH6
CH7
+5V
0V
0V
– 15V
+ 5V
+ 15V
L+
M
Bus S7-400
Bus control
ENABLE
MUL
TIPLEXER
OPT
O RELA
Y
A
D
Meas.
range
module 0
Meas.
range
module 3
Bus S7-400
Bus S7-400
Figure 5-27 Block Diagram of the SM 431; AI 8 x 14 Bit