From previous posts over the years(and that the Nomad is equipped with an interlocked door from my understanding), I do believe this can be accomplished fairly easily - but I do not have the latest motion controller PCB to reference.
This thread from a few years back may help you out:
Feedhold (the definitive thread?) - Unsupported - Carbide 3D Community Site
There are also plenty of other threads on the forum if you do a search. With the recent release of the remote pendant, the way the controller handles Feedhold may be different from what people found 5+ years ago.