Siemens SIMATIC ET 200PA SMART Operating Instructions Manual page 154

ET 200PA SMART I/O modules
10.4 Analog input modules
Wiring: Voltage measurement
①
Voltage measurement: (±5 V, ±10 V, 1 V to 5 V, 0 V to 10 V)
②
Voltage measurement (± 50 mV, ± 500 mV, ± 1 V) (note the input resistance defined in the technical data)
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 10-6 Block diagram and terminal diagram
154
Operating Instructions, 06/2019, A5E34192013-AB
ET 200PA SMART