• Note that Relay3 can be tied to pin 16 or 17 on Port 2.
  • You can enable the Safety Charge Pump (SCHP) on pin 17 on Port 2.  This way when the SCHP signal is active, the e-stop is closed, then the board will activate, and you will get the Green LED, and Relay2 will activate.
  • All outputs will get disabled on e-stop or fault condition and the Green LED will go off, and the Relay3 will disengage. 

SCHP configuration in Mach3.

Ports & Pins > Output Signals



SCHP configuration in UCCNC.