The easiest way to get table level signals (Home, Limits, E-stop, etc) back to the software and get power out to table power components.  The Status LED's are out where you can SEE THEM!  Not stuck back inside some cabinet.  Sealed clear plastic case is an Option. TABLE I/O Satellite Card.  Part of all MP1000-THC, MP1000-Spindle Speed and MP1000-Basic units MP1000 Spindle Speed (SPS) with Table I/O and older AXIS IO cards.