Has anyone ever used to MOSAIC controllers in unison?

I have a large conveyor system that has 2 phases of construction. Phase 1 has 18 E-Stops across the entire system and Phase 2 will have approximately 10-15 E-stops in another building.

I was thinking of using a separate controller on each phase, but can they communicate back and forth reliably following all the safety regulations.

Example: if an E-stop is pressed on Phase 1 or Phase 2 system, I want it to halt both systems simultaneously.

How can this be done (if it can)? Do I need to come up with a way to do this with hardwiring or can this be done via a "remote-base" per se?