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Coil voltage on open relay contacts ? #70

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rolox2022 opened this issue Feb 7, 2024 · 2 comments
Open

Coil voltage on open relay contacts ? #70

rolox2022 opened this issue Feb 7, 2024 · 2 comments

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@rolox2022
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Hi, i noticed a strange behaviour:
there seems to be some "interconnection" between coil and contacts of a relay ....
can be reproduced with simple circuit attached.
relay issue
relay issue.txt

@rolox2022
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Edit...its obviously a misunderstanding on my side...the parameter "off resistance" is by default 1M which affects low current signals switched by relay and also is related to contact-contact resistance as kind of "isolation resistance"
As in the example no current is applicable with only testpoints, the full 5V show up at the open contacts ....

@pfalstad
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Yes, that's correct. You need a pulldown resistor if you want the open contact to be grounded.

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