Siemens SIMATIC ET 200PA SMART - Page 155

Wiring: 2-wire and 4-wire transducers for current measurement
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① 4-wire transducer (0/4 mA to 20 mA or ± 20 mA)
② 2-wire transducer (4 mA to 20 mA)
③ Equipotential bonding
④ Internal supply
⑤ + 5 V from backplane bus
⑥ Logic and backplane bus interface
⑦ Electrical isolation
⑧ Multiplexer
⑨ Analog to Digital Converter (ADC)
⑩ Current source
Figure 10-7 Block diagram and wiring diagram
ET 200PA SMART I/O modules
10.4 Analog input modules
ET 200PA SMART
Operating Instructions, 06/2019, A5E34192013-AB 155