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Saturday, November 9, 2013

Buzzing a mantrap with a single user input

I have been installing many new VoIP systems and door releases in the diamond district lately. Just about every single office within the diamond district has a mantrap at the entrance. Basically a mantrap is a set of two doors. When one door is open the second door can not be open.





Configuring multiple relays like this are not limited to mantrap applications. If both doors are permitted to be opened at the same time the magnets can be removed from the configuration, and the wire going to the magnet can go directly to the door latch. Other possibilities would be for an electronic gate, or garage door that would automatically close - timings would need to be adjusted to allow sufficient time between cycles, and should be wired into a laser to ensure that the door does not close on anything that might not clear the gate/door. 

The image shows configuration with a doorphone, but this could easily be modifiable for any relay application, such as keychain FOBs. 

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