Part 1 – Introduction
19
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NC/NO (Relay Alarm Outputs)
This NVR is capable of activating/deactivating buzzers,
lights, and other external devices. Connect the device to
the C (Common) and NC (Normally Closed) or C and NO
(Normally Open) connectors. NC/NO is a relay output
which sinks 2A@125VAC and 1A@30VDC. For more
information on alarm out setup, refer to the
Alarm-Out
in the operation manual
.
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ARI (Alarm Reset In)
An external signal to the Alarm Reset In can be used to
reset both the Alarm Out signal and the NVR’s internal
buzzer. Mechanical or electrical switches can be wired to
the ARI (Alarm Reset In) and GND (Ground) connectors.
The threshold voltage is below 0.3V and should be
stable at least 0.5 seconds to be detected. Connect the
wires to the ARI and GND connectors.
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Connector Arrangement
AI1 through AI4
Alarm In 1 through 4
G
Ground
C
Relay Common
NO/NC
Normally Open and Normally
Close Relay Alarm Out
(connected to C port)
RS-485 Connection
This NVR supports the RS-485 half-duplex serial
communication protocol for connecting to external
devices such as POS units.
RS-232 Connection
Connect an external device such as a POS unit to this
port.
