Limit and Home Switch Choice

[birchy]

E-Stop are EMERGENCY stops, so should be wired for YOUR protection. When you've got your hand wrapped around a cutter, you won't have time to ponder on which E-Stop to press...

The "usual" way to setup E-Stops is using a 24VDC circuit with all E-Stops in series which then drop out a contactor (or proper safety relay if you have plenty of cash!). You latch the contactor via a reset button and N.O. auxiliary contact on the relay. This way, the circuit will be safe if any E-Stop is activated or a cable gets broken. I've put my axis limits in series with the E-Stops because a near-crash IS an emergency. As for your feedback, you simply use another spare aux contact on the relay to make or break the BOB com/5v link.