Air assist relay wiring

Machine: k40 nano

Board: laserboard

Firmware: _Smoothie or GRBL-LPC? Grbl

Problem/ Question: when wiring this relay https://www.sparkfun.com/products/14236 do you use the 24v screw or the 5v pin on the board?

14236-01

Either will work, but I’d use the protected 24V out in this case (anything that interfaces with line voltage should be optoisolated, IMO).

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