Siemens SIMATIC Manual page 356

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 bit;(6ES7331-7KF02-0AB0)
Wiring: 2-, 3- and 4-wire connection of resistance transducers or thermoresistors
①
4-wire connection
②
3-wire connection, no compensation for line resistors
③
2-wire connection, no compensation for line resistors
Figure 6-15 Block diagram and wiring diagram
Measuring range module settings
(linear, 4-wire connection) (temperature
Note
• "Resistance measurement" is only available at one channel per group. The "2nd" channel
of the group is used accordingly for current measuring mode (I
group returns the measured value. The "2nd" channel of the group is assigned the default
overflow value "7FFF
• There is no compensation of the line resistance with a 2 and 3-wire connection.
356
Measuring range
150 Ω
300 Ω
600 Ω
Thermoresistor
measurement)
RTD-4L
."
H
Pt 100 Klima
Ni 100 Klima
Pt 100 Standard
Ni 100 Standard
). The "1st" channel of the
C
Manual, 06/2017, A5E00105505-AJ
Measuring range module
setting
A
A
S7-300 Module data