Siemens Simatic S7-400 - Page 232

Technical specifications for SM 431; AI 8 x 13 bit
Dimensions and weight
Dimensions W x H x D (mm) 25 x 290 x 210
Weight ca. 500 g
Module-specific data
Number of inputs 8
● For resistance-based sensor
4
Cable length
● shielded
Maximum 200 m
Voltage, current and potential
Rated load voltage L+ Not required
Constant measured current for resistance-based sen‐
sor
Typ. 1.67 mA
Electrical isolation
● Between channels and backplane bus
Yes
● Between channels
No
Permissible potential difference
● Between inputs and MANA (UCM)
30 V AC
● Between the inputs (UCM)
30 V AC
● Between MANA and Mintern (UISO)
60 V DC/30 V AC (SELV)
Insulation tested at
● Between bus and analog section
2120 V DC
● Between bus and chassis ground
500 V DC
● Between analog section and chassis ground
2120 V DC
Current consumption
● From backplane bus (5 V)
Maximum 350 mA
Module power loss Typ. 1.8 W
Formation of analog values
Measuring principle Integrating
Integration time/conversion time/resolution (per chan‐
nel)
(Not part of the response time)
● Configurable
Yes
● Interference voltage suppression f1 in Hz
60 / 50
● Integration time in ms
16.7 / 20
● Basic conversion time in ms
23 / 25
● Resolution (including overrange)
13 / 13 bit
Measured value smoothing Not possible
Basic execution time of the module in ms (all channels
enabled)
184 / 200
Noise suppression, error limits
Interference voltage suppression for f = nx (f1 ±1%),
(f1 = interference frequency) n = 1, 2, ...
● Common mode interference (UCM < 30 V)
> 100 dB
Analog modules
5.19 Analog input module SM 431; AI 8 x 13 Bit (6ES7431-1KF00-0AB0)
S7-400 Automation System Module Data
232 Reference Manual, Ausgabe 11/2016, A5E00850736-08