Siemens SIMATIC Manual page 371

Wiring: 2-wire and 4-wire transducers for current measurement
Figure 6-20
Measuring range module settings
2-wire transducer
4-wire transducer
Measuring range module in "Current" position
If "current" measuring mode is set, any voltage measurement will destroy the measuring
range module.
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
6.8 Analog input module SM 331; AI 2 x 12 Bit; (6ES7331-7KB02-0AB0)
Wiring and block diagram
Measuring range
CAUTION
4 mA to 20 mA
± 3.2 mA
± 10 mA
0 mA to 20 mA
4 mA to 20 mA
± 20 mA
Analog modules
Measuring range module setting
D
C
371