Intelligent 2 3 4 Door Interlock Controller for Fail Safe Airlock Buffer Room 12V 24V

The input voltage: AC220V 50 hz
Output voltage: 12V / 24V Working
Model: Fail Safe 
1. Isolate the clean room from the outside air circulationOnly one of the two doors (up to four doors) of the airlock room or buffer room can be opened, so as to maintain the cleanliness of the clean room. 
2. The door can be opened at any timeAfter entering the normal use state, the indicator lights on both sides of the rear door display green, and their locks are open. Only when the opposite door is opened, the door is locked, and the opposite door is locked after the door is opened. To prevent employees from not closing the door, it is recommended to use it together with the door closer.Note: This set of electronic interlocking defaults to fail safe. If you need fail secure, please contact customer service! 
3. Equipped with emergency unlocking functionWhen a door forgets to close after it is opened, the controller will start the emergency program 300 seconds later, and all doors will be unlocked intelligently. After all doors to be unlocked are closed, the electronic interlocking device will work normally again.The unlocking time can be customized. For customization, please contact customer service! 
4. It is equipped with door closing alarm functionIf a door is not closed after being opened, the indicator panel will send out a continuous buzzer alarm after 10 seconds to remind the door to close. 
5. Emergency manual door opening,In case of emergency, press the open key on the panel to unlock the current lock.