greggilesgr36
Topic Author
Posts: 1
Joined: 30 Oct 2020, 13:21

RevPi Connect x4 - Pin 3? Ground or Danger?

30 Oct 2020, 13:31

I have about 30 devices deployed in the field and have suffered a few failures, where devices either have strange ethernet issues, or in some cases won't power on. Running on what I think is a robust and clean 24VDC power source.

Looking for anything we've done wrong, upon re-investigation of documentation, here: https://revolution.kunbus.com/tutorials ... n-connect/

It shows a ground symbol on pin 3 of X4, but in the text states "DO NOT CONNECT!"

It appears that several of my devices are indeed wired with ground to pin 3.
  • Could this be an issue?
  • Which is correct? Markings on device
 
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dirk
KUNBUS
Posts: 1426
Joined: 15 Dec 2016, 13:19

Re: RevPi Connect x4 - Pin 3? Ground or Danger?

09 Nov 2020, 12:40

Hi greggilesgr36, can you check if your RevPi Connect devices have four or eight pins on the X4 connector? There are two hardware versions available. You can also check the QR codes on the front bottom left. The last number is 1.1 or 1.0.
We need to extend the documentation to include these two variants. Please check the Watchdog wire jumper. The RevPi Connect devices are equipped with a watchdog timer, which is activated when this bridge is removed. This could explain your described behaviour but does not necessarily mean that this is the cause.https://revolution.kunbus.com/tutorials ... g-connect/
 
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dirk
KUNBUS
Posts: 1426
Joined: 15 Dec 2016, 13:19

Re: RevPi Connect x4 - Pin 3? Ground or Danger?

27 Nov 2020, 16:44

Hi
It shows a ground symbol on pin 3 of X4, but in the text states "DO NOT CONNECT!"
- this is unfortunately misleading currently. We have to update the documentation here.
Pin 3 is connected to functional earth. So you must not use it otherwise.

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