PXI-2503 Switch load

[Paladin22]

In the data sheet, there is a spec called "Minimum switch load"

What does it mean actually? Does it mean the minimum load current/voltage on the load channel? What if the load channel has 0V?

How much is the expected leakage current from each of the ON channel?

[santo_13]

That is the minimum current required to keep the relay contacts clean (by arcing), if you fail to do so, the contact resistance increases over time due to oxidation.

You can read more in the below articles,

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000oxMxCAI&l=en-US

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019UBzSAM&l=en-US

If you're switching 0V or GND, there should be a minimum of 10uA flowing through it to maximize the performance and lifespan of the relays.