I am evaluating a few sensors for an application at work, and I'm having some troubles figuring out the correct way to connect/test this sensor: Gems Sensors' CAP-150. Datasheet here. I want to connect it later on to an ATMEGA324PA.
I know I'm using the Dry Sink variant, but I can't make any sense of the BLK/BLU switch diagram, nor the 300mA max load.
What I think I should do is supply the sensor with 5VDC at the BRN wire, GND to the BLU wire and then check the BLK wire for status change at one of the ATMEGA's pins. Although, the 300mA warning is confusing me, because it's specified as "continuous switching current" - on the other hand, the current consumption is rated at under 10mA.
I know that the ATMEGA can source the 10mA without any trouble, but does the 300mA warning mean I can't supply beyond that current to the sensor? In the configuration I described, is there any scenario where this could happen?
Can anyone help me clear this out?