7
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 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 9 — 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)
An external signal to the
Alarm Reset In
can be used to reset both the Alarm Out signal and the
DVR’s internal buzzer. 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. Connect the wires to the
ARI
(Alarm Reset In) and
GND
(Ground)
connectors.
