17
R20A
Admin Guide
for normally open contact while NC stands for normally closed
contact.
Relay ID:
R20A supports two relays, user can configure them
respectively.
Relay Type:
Default state means NC and COM are normally closed,
while Invert state means NC and COM are normally opened.
Relay Delay:
To configure the duration of opened relay. Over the
value, the relay would be closed again.
Relay Status:
While the relay is triggered, the statues will be
switched. When COM connects to NC, the status is Low.
Note:
Relay operates a switch and does not deliver power, so user
should prepare power adapter for external devices which connects
to relay.
3.6.2.Unlock via DTMF code
Users can press the predefined DTMF code from an answer unit to
remotely unlock the door during the call. Users will also hear “The
Figure 3.6.1 Relay
Содержание R20A
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