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Siemens S7-400 Manual De Usuario

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Analog Modules
5-133
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 431; AI  8 
 
 16  Bit
Dimensions and Weight
Dimensions W 
 
 H 
 
 D
(in millimeters)
25 
 
 290 
 
 210
Weight
Approx. 650 g
Data for Specific Module
Number of inputs
8
Length of cable
•
Shielded
200 m
Voltages, Currents, Potentials
Isolation
•
Between channels and
backplane bus
Yes
•
Between the channels
Yes
Permitted potential difference
•
Between the inputs (U
CM
 )
120 VAC
•
Between M
ANA
 and
M
internal
 (U
ISO
)
120 VAC
Insulation tested with
1500 VAC
Current consumption
•
From the backplane bus
Max. 1200 mA
Power dissipation of the
module
Typ. 4.6 W
Analog Value Generation
Measuring principle
Integrative
Integration time/conversion
time/resolution (per
channel)
(Does not go into the
response time)
•
Parameters can be
assigned
Yes
•
Integration time in
milliseconds
2.5
16.7
20
100
•
Basic conversion time
including integration
time in milliseconds
10
16.7
20
100
•
Resolution in bits (incl.
overrange)
16 bits
•
Noise suppression for
frequency f1 in Hz
400
60
50
10
•
Basic execution time of
the module, in ms (all
channels enabled)
10
16.7
20
100
Smoothing of the measured
values
Parameters can be
assigned in 4
stages
Suppression of Interference, Limits of Error
Interference voltage suppression for f = n 
 
 (f1 
"
 1%),
(f1 = interference frequency) n= 1.2 ...
•
Common-mode
interference
(U
CM
 < 2.5 V)
> 130 dB
•
Series-mode noise
(peak value of noise 
< nominal value of input
range)
> 80 dB
Crosstalk between the
inputs
> 130 dB