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Wiring of 3-wire RTD with 6ES7531-7QF00-0AB0

6/4/2024 9:27 AM	Rate (0)
SerkanC2 Regular Member Joined: 3/15/2021 Last visit: 11/24/2025 Posts: 8 Rating: (0)	Hello everyone, In one of my projects, I need to connect 2 or 3-wire RTD (Pt100 Standard) sensors to the 6ES7531-7QF00-0AB0 8-channel AI module. There is information in the price list that the number of channels may be reduced to 4. I reviewed the manual and wiring diagram of the AI module. It seems that there is no harm in connecting Pt100 to 8 channels. Can you please confirm? Best regards. Wiring of 3-wire RTD with 6ES7531-7QF00-0AB0 Attachment Image.png (358 Downloads)

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6/4/2024 9:34 AM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 12/24/2025 Posts: 9097 Rating: (1202)	Hello, Here a link to manual: SIMATIC S7-1500/ET 200MP Analog Input Module AI 8xU/I/R/RTD BA See chapter3 for wiring. (Page 17 for resistance sensors) You can use 2-wire and 3-wire sensors, and then you will have 8 channels. Best regards, Wizard

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This contribution was helpful to 1 thankful Users SerkanC2

6/4/2024 9:38 AM	Rate (0)
SerkanC2 Regular Member Joined: 3/15/2021 Last visit: 11/24/2025 Posts: 8 Rating: (0)	Then I continue like this. Thanks. Attachment image1.png (321 Downloads)

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