Yet another Denford for the collection (Triac Retrofit thread)

[m_c]

I don't class Limits as Emergency stop condition. They are positional errors which if talking directly to Controller and not relying on software can be handled by controller/drives safely with out any need to kill power. Soon becomes pain in the arse reseting if when approaching travel limits you accidentally trip limit.

You can argue both ways, but Denfords have the limit switches as part of the E-stop circuit as standard, and I don't see any point in changing it.
Provided you have soft limits working correctly, you should never hit a limit switch anyway, so if you do, it's because something has gone wrong.