Switched from PNP prox's to microswitchs, wired NO with shielded 22awg 2 conductor cable. tied the shield on the cabinet end to earth ground. when I view the Mach3 diagnostics screen, the input pins flicker on and off, along with there respective Input switch indicator (yellow squares flickering on and off, constantly triggering reset) is my 400ma power cube to small for the long cable runs @22awg? Do I just need a better 5vdc power supply? why is the breakout board seeing this sporadic on off state? thanks.