Monthly Archives: January 2021

GRBL AIO – Coolant Output

Connecting a Pump or other accessory to the GRBL-AIO Coolant Output. Notes: The coolant output is for switching low voltage & low current DC circuits. You should be switching a relay if possible rather than powering your accessory via Coolant Pins 2 & 3. On occasions where your accessory requires less than a few amps […]