
Analog modules
5.20 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF10-0AB0)
S7-400 Automation System Module Data
260 Reference Manual, Edition 09/2009, A5E00850736-06
Specifications of the SM 431; AI 8 x 14 Bit
Dimensions and weight
Dimensions W x H x D (mm) 25 x 290 x 210
Weight Approx. 500 g
Module-specific data
Number of inputs 8
With resistance-type sensor
4
Cable length
Shielded
Max. 200 m
In the 80 mV input range and with thermocouples
Max. 50 m
Voltages, currents, electrical potentials
Nominal load voltage L+ 24 VDC (only required for the supply of 2-
wire transducers)
Reverse polarity protection
Yes
Transducer power supply
Supply current
Max. 50 mA
Short-circuit-proof
Yes
Constant measured current for resistance-type sensor Typ. 1.67 mA
Electrical isolation
Between channels and the backplane bus
Yes
Between channels
No
Between channels and load voltage L+
Yes
Permissible potential difference
Between inputs and MANA (UCM)
120 VAC
Between input (UCM)
120 VAC
Between MANA and M-internal (UISO)
75 VDC / 60 VAC
Isolation test voltage
Between bus and L+/M
2120 VDC
Between bus and analog section
2120 VDC
Between bus and chassis ground
500 VDC
Between analog section and L+/M
707 VDC
Between analog section and chassis ground
2120 VDC
Between L+/M and chassis ground
2120 VDC
Current consumption
From the backplane bus (5 V)
Max. 600 mA
From load voltage L+
Max. 200 mA (with 8 connected, fully
controlled 2-wire transducers)
Power loss of the module Typ. 3.5 W
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