Two circuit systems
1. Can be powered by battery alone, but also external 12V power supply
2. Installed battery and connected to the power supply available at the same time, power outages automatically switch to battery-powered work, not afraid of power outages
3. Priority use 12V power supply, when the power outage will only use the battery power
1. 4*AA battery power supply
2. External 12V power supply port
3. Inside reading head port
4. External read head port
5. Reset button
6. Open door button interface
7. Building interface
8. Door magnetic interface
9. Motor
10. Motor interface
11. Infrared signal receiver