Basically, PoKeys supports three switches per axis - limit-, home/ref and limit+. They used to be handled separately, but since version 3.1.0, PoKeys devices now support combined home and limit switches. The behaviour of limit switches is that motion is halted anytime the limit switch is hit unless in homing mode (if home/limit combined option is enabled). The limit switches can also be disabled by enabling 'limit override', but then the machine's safety is in operator's hands.