Siemens Simatic S7-400 - Page 276

Technical specifications for SM 431; AI 16 x 16 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
16
8
Cable length
Shielded with input range ≦ 80 mV and with thermo‐
couples
Maximum 200 m Maximum 50 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
● Between channels
● Between channels and load voltage L+
Yes
No
Yes
Permissible potential difference
● Between inputs and MANA (UCM)
60 V DC/30 V AC (SELV)
● Between the inputs (UCM)
60 V DC/30 V AC (SELV)
● Between MANA and Mintern (UISO)
60 V DC/30 V AC (SELV)
Insulation tested at
● Between bus and L+/M
2120 V DC
● 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 700 mA
● From load voltage L+ (with 16 connected fully
controlled 2-wire transducers)
Maximum 400 mA
Module power loss Typ. 4.5 W
Formation of analog values
Measuring principle Integrating
Integration time/conversion time/resolution (per chan‐
nel)
(Not part of the response time)
Analog modules
5.23 Analog input module SM 431; AI 16 x 16 Bit (6ES7431-7QH00-0AB0)
S7-400 Automation System Module Data
276 Reference Manual, Ausgabe 11/2016, A5E00850736-08