Wiring an isolator between an AI and a 2-wire transmitter
Created by: Ariya Man at: 5/25/2013 12:20 PM (4 Replies)
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| 5/25/2013 12:20 PM | |
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Posts: 90 Rating:
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Hey guys! I want to install a 3-way signal isolator between an analog input module (6ES7331-7KF02-0AB0) and a 2-wire transmitter. I know the proper wiring of an AI module and transmitter based on the S7 manuals but I’m not sure about the wiring in the case of adding a signal isolator. However I have considered two different wiring diagrams as shown in attached file. Could you take a look at them and give me some advice on how to do to the wiring? Should I implement Figure-1 or Figure-2? |
| 5/25/2013 4:12 PM | |
Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating:
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Hello, Fig 1 you use if the isolator is not powering the sensor by the 4 to 20 mA loop. Fig 2 you use if the isolator can power your loop. So wht's in the isolator specs? Regards, Marcjan |
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Problem solved? |
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| 5/25/2013 7:03 PM | |
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Posts: 90 Rating:
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Thank you Marcjan! The isolator catalog is attached. As you can see it needs a 24 VDC power itself and since the input and output are separated I don’t think it can provide the loop. What do you think? Attachmente_cat_083.pdf (331 Downloads) |
| 5/27/2013 7:16 AM | |
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Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating:
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Hello, You are right, so you can use Fig 1 to connect your sensor. Regards, Marcjan |
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| 6/28/2013 9:06 AM | |
Joined: 11/18/2010 Last visit: 8/5/2022 Posts: 523 Rating:
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hi i think Fig 2 is right because in isolatoris providing power to ai ,so not need to provide external supply between plc and isolator. viral |
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