Siemens SIMATIC S7-1500 Manual page 15

Wiring
Block diagram and pin assignment for 4-wire transmitter for current measurement
The example in the following figure shows the pin assignment for current measurement with
4-wire transmitters.
①
②
③
④
⑤
Figure 3-3
14
Wiring 4-wire transmitter
Analog-to-Digital Converter (ADC)
Backplane bus interface
Supply voltage via power supply element
Equipotential bonding cable (optional)
Block diagram and pin assignment for 4-wire transmitter for current measurement
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC