User Guide

26
R27A/V
Admin Guide
There are three terminals of relay: NO, NC and COM. NO stands
for normally open contact. NC stands for normally closed contact.
Relay ID:R27 supports three relays. Users 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 operate a switch and does not deliver power, so users
should prepare power adapter for external devices which connects
to relay.
3.7.2. Unlock via DTMF Codes
Users can unlock via a DTMF code when in a call.
Go to Intercom - Relay to configure DTMF code parameters.
Figure 3.7.1 Relay