Analogue 2 loops not expandable. Max. 250 devices analog (any type detectors / modules-push-sirens) loop. Stir in 1 conventional zone supports up to 30 devices. 8 outputs (OC) supervised. 8 outputs (OC) unsupervised. NAC 3 outputs monitored. 12V auxiliary power source. FC500 panel "Master" supports up to 7 panels "slaves". The "Software FireClass 500 Console" (free) makes programming and provides event log functions.