Hooked up the IoT Relay to my 611 spindle; 2 wires - Black to GND, Red to 0-10v Spindle. Set Easel to ‘auto’ spindle control and then when I go through ‘Carve’ prep it turns the spindle ON for about 3 seconds, then it turns it off. You can hear the IoT Relay ‘relay’ inside kick it back off. I’ve tried both ‘Normally Off’ sides of the IoT. Only two things plugged into the IoT, the Xcontroller and the spindle.