How much voltage and current can be applied to my sensorProbe8-X20 dry contact inputs?

AKCPsensorProbe Series, Support

Maximum voltage on sensorProbe8-X20 dry contact input? You can input up to 5VDC to the 20 extra dry contact inputs or up to 30VDC if these are configured in the opto isolated mode. Please see the ?How do I? section on how to configure these.

AKCPHow much voltage and current can be applied to my sensorProbe8-X20 dry contact inputs?