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PXIe-2531 voltage limit

On the PXIe 2531 matrix, I noticed that there is a maximum voltage of 60VDC, but the datasheet is not clear as to why. Where does this number come from?

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The 60V limit might potentially come from the Reed Relays used at the crosspoints. Exposing the reed relays to high voltage or current will shorten the lifespan.

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