What's the best way to feed NO/NC sensor inputs to both the DVR and alarm system panels, without having to build an isolation circuit? Although just simple relays, still lots of hassle and time.

Are we going to see newer DVRs soon with built-in isolation and courtesy "looping" outputs for alarm input terminals ....... that can be safely hooked to the alarm panel) ? Much like video loop-thru.

Alternatively (before the above DVR enhancement), are there existing products that "clone" a NC/NO input to drive two devices safely?

Any tips will be appreciated!