1-All zones accept two-wire smoke detectors 2-any normally-open contact devices. 3-AC220V operation battery backup General Specifications1.Main Supply: 220V AC 50/60Hz+10%2.Battery Voltage: 24V DC3.Charging Voltage Protection: Glass Fuse4.Battery over discharge Protection: 19V DC5.Sound Output: 24V Nominal EQL 10K resistor6.Auxiliary Contacts: 30DC 1A max NC/NO.7.Mains Supply Protection: Glass ...