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User's Manual
Connecting Alarms
Figure 9 — Alarm Input connector strips.
NOTE: To make connections on the Alarm Connector Strip, press and hold the button
and insert the wire in the hole below the button. After releasing the button, tug gently on
the wire to make certain it is connected. To disconnect a wire, press and hold the button
above the wire and pull out the wire.
AI 1 to 16 (Alarm In)
You can use external devices (including alarm input on the observation camera) to signal the
DVR to react to events. Mechanical or electrical switches can be wired to the AI (Alarm In) and
GND (Ground) connectors. The threshold voltage is 4.3V and should be stable at least 0.5
seconds to be detected. See Chapter 3 — Configuration for configuring alarm input.
GND (Ground)
NOTE: All the connectors marked GND are common.
Connect the ground side of the Alarm input and/or alarm output to the GND connector.
AO 1 TO 4 (Alarm Out)
Figure 10 — Alarm Output connector strips.
The DVR can activate external devices such as buzzers or lights. Connect the device to the AO
(Alarm Out) and GND (Ground) connectors. AO is an active low open collector output which
sinks 5mA@12V and 30 mA@5V. See Chapter 3 — Configuration for configuring alarm
output.
ARI (Alarm Reset In)
Figure 11 — Alarm Reset Input connector strips.
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