Siemens Simatic S7-400

● Voltage
± 1 V / 100 kΩ
± 10 V / 100 kΩ
1 to 5 V / 100 kΩ
● Current
± 20 mA / 50 Ω
4 to 20 mA / 50 Ω
● Resistance
0 to 600 Ω / 10 MΩ
Permissible input voltage for voltage input (destruction
limit)
Maximum 18 V continuous;
75 V for 1 ms (cycle clock ratio 1 : 20)
Permissible input current for current input (destruction
limit)
40 mA continuous
Sensor connection
● For voltage measurement
Possible
● For current measurement
– As 2-wire transducer
– As 4-wire transducer
Possible
Possible
● For resistance measurement
– With 2-wire connection
– With 3-wire connection
– With 4-wire connection
Possible; line resistance is also measured
Possible
● Load of 2-wire transducer
Maximum 750 Ω
Analog modules
5.21 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF20-0AB0)
S7-400 Automation System Module Data
258 Reference Manual, Ausgabe 11/2016, A5E00850736-08