Siemens SIMATIC S7-400 Reference Manual page 298

Analog modules
5.24 Analog input module SM 431; AI 8 x RTD x 16 Bit (6ES7431-7KF10-0AB0)
● Group fault display
Input range (rated values) / input resistance
● Resistance thermometer
Maximum input voltage for voltage input
(destruction limit)
Connection of encoder
● For resistance measurement with 3-wire connection Possible
● With 4-wire connection
Characteristic curve linearization
For RTD resistance temperature detection
Measuring range
1
● PT100, PT200
● PT 500
● PT 1000
● Ni 100
● Ni 1000
User data in engineering format
7KF10 does not support all measuring ranges for S7.
1
298
– For internal fault
– For external fault
– Diagnostic information can be read out
Red LED (INTF)
Red LED (EXTF)
Possible
Data for selecting a sensor
Pt 100/> 10M
Pt 200/> 10M
Pt 500/> 10M
Pt 1000/> 10M
Ni 100/> 10M
Ni 1000/> 10M
35 V continuous;
75 V for max. 1 s
(duty factor 1:20)
(max. permissible line resistance 10 Ohm)
Possible
Configurable
Pt100...1000,
0.00385 Alpha to
DIN IEC 751
Ni 100...1000,
0.00618 Alpha to
DIN 43760
-200 °C to +850 °C
-200 °C to +800 °C
-200 °C to +240 °C
-60 °C to +250 °C
-60 °C to +130 °C
Degrees C/
Degrees F
Reference Manual, Ausgabe 11/2016, A5E00850736-08
S7-400 Automation System Module Data