Siemens SIMATIC - Page 355

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 bit;(6ES7331-7KF02-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
355
Wiring: 2-wire and 4-wire transducers for current measurement
Figure 6-14 Block diagram and wiring diagram
Note
The interconnection between M
ANA
and M- (terminals 11, 13, 15, 17, 19) is not required when
using grounded 4
-wire transducers with non-isolated supply.
Measuring range module settings
Measuring range
Measuring range module setting
2-wire transducer
4 mA to 20 mA
D
4-wire transducer
± 3.2 mA
± 10 mA
0 mA to 20 mA
4 mA to 20 mA
± 20 mA
C
CAUTION
Measuring range module in "Current" position
Any voltage measurement will destroy the measuring range module if "current" measuring
mode is set.