Wiring
Analog Input Module AI 8xU/R/RTD/TC HF (6ES7531-7PF00-0AB0)
Manual, 09/2016, A5E36647959-AB
21
Connection: 2, 3 and 4-wire connection of resistance-type transmitters or resistance thermometers
(RTD)
The example in the following figure shows the pin assignment for 2, 3 and 4-wire
connections of resistance-type transmitters or resistance thermometers.
4-wire connection CHx Channel or 9 x channel status
Status display LED (green)
Analog-to-Digital Converter (ADC)
LED for power supply (green)
Supply voltage via power supply element
Equipotential bonding cable (optional)
Figure 3-3 Block diagram and terminal assignment for 2, 3, and 4-wire connection
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