AIPHONE C-ML Intercom Door Lock

 AIPHONE C-ML Intercom and magnetic door unlock wiring system.

Outside the building a delivery person presses the doorbell button on the LE-D unit and lets go. This rings a loud bell on the C-ML.

Inside a security person presses and holds the microphone flip switch on the C-ML and talks into it "how may I help you?" and then lets go of the switch-which in turn activates a microphone on the outdoor LE-D unit.

The outside delivery person has a few seconds to speak "your sandwiches are here!"

The indoor security person can then press the little black door unlock button which cuts power to the magnet holding the door open for a few seconds allowing sandwich to be delivered.

Alternately, a person can swipe a magnetic swipe card in the REI reader, or type in a code on the REI keypad and the door magnet will unlock for a few seconds.

With short runs of wire during testing only 3vDC was needed for the intercom and doorbell to work. I also have a 16.5vAC Revere wall wart that might work on parts of this system-possibly feeding the keyboard logic boards and magnet lock "brain" (still playing around).

Green wire on left, white on right.

When the little black door unlock button is pressed on the C-ML the ohm resistance on the green and white wires change. There is no voltage, this acts as an on/off switch for the door magnet/keypad part. 

There are a lot of wires on the keypad that interface with the unlock button, card reader and the magnet lock. I'll update in a week or two when i open that up and wire it in. 

Left top/Black wire/Door open (ohm continuity)

Right top/White wire/Door open (ohm continuity)

Middle left/Black negative DC power

Middle right/Green to LE-D doorbell

Bottom left/Red positive DC power

Bottom right/White  to LE-D doorbell

Now i have to wire up the keypad "brain" of the system and the keycard slide reader.

"Just slide the sandwiches under the truck...meow."