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DOOR ENTRY SYSTEMS
AUTOMATIC DOOR-OPENING ON CALLING A DWELLING – DIGITAL SYSTEM
Important: Ensure that the polarity of D1, D2
Audio unit
between the telephone and the connections bracket
is respected.
Note: To connect the door entry system, look up in the technical datasheet that comes with
the audio unit.
Operation
The call to the dwelling is used as the control signal, allowing the circuit between terminals
22 and 18 of the audio unit to be closed and for power to be supplied to the electric lock
for a pre-established period of time (see timing in adjusting instructions).
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