Relay behavior not as expected

DIY
,
1

Using the relay output on the Phoenix Smart 50A (1+1) charger. Latest firmware installed.
I have set the relay up as ALARM, with a low trigger of 13.1V, and no delays.
Expected behavior:

  • At >13.1V, the relay will be open
  • At <13.1V, the relay will be closed
    Settings:

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Result:
At 13.30V, the relay is closed! It should be open

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At <13.1V the relay does remain closed… but it should have changed state

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Any ideas? Thank you!

2

The relay does not open until 15.4V, look at your setting to see the icon with the alarm bell crossed out. This is called hysteresis, you have a slightly different reset condition so if you are fluctuating at 13.1V your alarm does not keep going on and off.

1 Like
3

Thank you very much! That solved my issue - really appreciate your help :slight_smile:

4

Normally you would have low alarm at 13.1V and reset at say 13.4V

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5

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