# X20AI2622 - input signal 4-20mA

**URL:** <https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149>\
**Category:** Controls & Vision\
**Tags:** x20\
**Created:** [February 12, 2026, 8:32am UTC](https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149 "2026-02-12T08:32:27Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Vojtech\_Jemelka](https://avatars.discourse-cdn.com/v4/letter/v/FF8800/32.png) [@Vojtech\_Jemelka](https://community.br-automation.com/u/Vojtech_Jemelka)\
**Post date:** [February 12, 2026, 8:32am UTC](https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149/1 "2026-02-12T08:32:27Z")

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Hi, do I need an external power source to connectet sensor with 4-20mA output signal? It is not sure for me from the documentation.

Thanks.

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**Author:** ![michael.bertsch](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/michael.bertsch/32/239_2.png) [@michael.bertsch](https://community.br-automation.com/u/michael.bertsch)\
**Post date:** [February 12, 2026, 8:46am UTC](https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149/2 "2026-02-12T08:46:00Z")

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Hello,

You did not add the Information which Sensor you wan’t to use.  
Typicaly the Sensor has a 3 Pin Contact

```auto
 +Supply 24V -> From anywhere where you get Supply   
 Signal 4-20ms -> X20AI + 
 GND -> X20AI - / also Connect to your Supply

```

 ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/5/561d3f8f3b4815182db836f282958b0ccc584d63.png)

You can use X20PD-Modules

Greetings  
Michael

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<div class="post-metadata">

**Author:** ![Vojtech\_Jemelka](https://avatars.discourse-cdn.com/v4/letter/v/FF8800/32.png) [@Vojtech\_Jemelka](https://community.br-automation.com/u/Vojtech_Jemelka)\
**Post date:** [February 12, 2026, 9:05am UTC](https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149/3 "2026-02-12T09:05:19Z")

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Hello,

The question was general about type of sensor. I thought from this wiring diagram, that I can connect 2wire sensor directly, for example VEGABAR82.

X20AI + to sensor + and X20AI - to sensor -.

But your answer means, this is not possible, I need external power source (Like you wrote, From anywhere where you get Supply). So, thanks

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<div class="post-metadata">

**Author:** ![michael.bertsch](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/michael.bertsch/32/239_2.png) [@michael.bertsch](https://community.br-automation.com/u/michael.bertsch)\
**Post date:** [February 12, 2026, 9:12am UTC](https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149/4 "2026-02-12T09:12:19Z")

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Hello,

There are 6 different versions of the Sensor available, as far as i understood. Each has its own set of pin connections. Only Version 4 Two-Wire HART has only 2 pins.

[VEGABAR82](https://www.vega.com/de-de/produkte/produktkatalog/druck/elektronischer-differenzdruck/vegabar-82?gad_source=1&gad_campaignid=9034347970&gbraid=0AAAAAD_DPN4JljuPi6DVFVBwjalBchAuu&gclid=EAIaIQobChMIofLa78zTkgMVkZaDBx3QfRVkEAAYASABEgIPufD_BwE)

 ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/c/c1687787b554d9c41c74d2fbe3f8013ce3e66aa6.png)

If you wan’t to use a HART Device, you must use a compatible AI-Card.  
For example this X20AI2438 has HART Support.

 ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/c/c53eb955530059430fd3e174d43ffe72378e0a72.png)

Greetings  
Michael

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<div class="post-metadata">

**Author:** ![Vojtech\_Jemelka](https://avatars.discourse-cdn.com/v4/letter/v/FF8800/32.png) [@Vojtech\_Jemelka](https://community.br-automation.com/u/Vojtech_Jemelka)\
**Post date:** [February 12, 2026, 10:42am UTC](https://community.br-automation.com/t/x20ai2622-input-signal-4-20ma/10149/5 "2026-02-12T10:42:21Z")

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> [@michael.bertsch](#):
>
> X20AI2438

Thanks for your answer, it is clear now