Siemens SIMATIC S7-300 Module data - Page 285

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 Bit;(6ES7331-7KF02-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6-51
Caution
If you have set the measuring range module to the "current" setting and voltage is being
interrogated, the module is destroyed.
Wiring: 2, 3 and 4-wire connection of resistive transducers or thermoresistors
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Figure 6-16 Block diagram and wiring diagram
① 4-wire connection
② 3-wire connection
③ 2-wire connection
Measuring range module settings
Measuring range Measuring range module
setting
150 Ω
300 Ω
600 Ω
A
Thermoresistor
(linear, 4-wire connection) (temperature
measurement)
RTD-4L
Pt 100 Klima
Ni 100 Klima
Pt 100 standard
Ni 100 Standard
A