I-View FAC – 500 FingerKey Access Controller DVR - Manual (Page 16)

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2.2.2. Door Lock Connection
FingerKey can support normal-open and normal-closed door lock simultaneously, as long as it
is connected with the different terminals respectively. Usually, Lock No terminal disconnects
with COM terminal, and they connect when FingerKey outputs the unlocking signal and
recover to disconnection when the signal ends. The connection and disconnection between
Lock NC terminal and COM terminal is opposite to above situation, they connect usually and
disconnect when the unlocking signal is output.
Due to the existence of varied electric-control door locks, the correct connection method must
be confirmed in accordance with the door lock specification: Lock NO terminal should be
used for the locks, which unlock when the power is on and lock when power is off; otherwise,
the Lock NC terminal should be used.
Take the electric-control lock, which locks usually when power is off, for example herein, to
show the connection method between FingerKey and locks. Use Lock NC terminal when
FingerKey is connected with the lock, which locks usually when power is on.