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Working principle of pass box
1. Mechanical interlocking device: The internal interlocking is realized in the form of a machine. When one door is opened, the other door cannot be opened. The other door must be closed before the other door can be opened.
2. Electronic interlocking device: The internal use of integrated circuits, electromagnetic locks, control panels, lights and other interlocking, when one of the doors is open, the other door open indicator light is off, to inform this door can not be opened, while electromagnetic Lock action to achieve interlocking. When the door is closed, the other electromagnetic lock starts to work and the indicator lights up, indicating that the other door can be opened.
Pass box outlook:
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