Technical specifications for SM 431; AI 8 x 14 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
● For resistance-based sensor
8
4
Cable length
● Shielded
Maximum 200 m
Voltage, current and potential
Rated load voltage L+
24 V DC (only required for supply of 2-wire
transducers)
● Reverse polarity protection
Yes
Supply voltage of the measuring transducers
● Supply current
Maximum 50 mA
● Short-circuit proof
Yes
Constant measured current for resistance-based sen‐
sor
Typ. 1.67 mA
Electrical isolation
● Between channels and backplane bus
Yes
● Between channels
No
● Between the channels and load voltage L+
Yes
Permissible potential difference
● Between inputs and MANA (UCM)
8 V AC
● Between the inputs (UCM)
8 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 L+/M
500 V DC
● Between analog section and chassis ground
2120 V DC
● Between L+/M and chassis ground
2120 V DC
Current consumption
● From backplane bus (5 V)
Maximum 1000 mA
● From load voltage L+
Maximum 200 mA (with 8 connected fully con‐
trolled 2-wire transducers)
Module power loss
Typ. 4.9 W
Formation of analog values
Measuring principle
Instantaneous value conversion
Integration time/conversion time/resolution (per chan‐
nel)
(Not part of the response time)
● Configurable
Yes
● Interference voltage suppression f1 in Hz
None / 400 / 60 / 50
Analog modules
5.21 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF20-0AB0)
S7-400 Automation System Module Data
256
Reference Manual, Ausgabe 11/2016, A5E00850736-08