Siemens Simatic S7-300 - Page 284

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 Bit;(6ES7331-7KF02-0AB0)
S7-300 Automation System Module data
6-50 Manual, 08/2006, A5E00105505-04
Wiring: 2 and 4-wire measuring transducer for current measurement
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Figure 6-15 Block diagram and wiring diagram
Note
The connection between M
ANA
and M- (terminals 11, 13, 15, 17, 19) is not needed for
grounded 4-wire transducers with a non-electrically 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