Installation

Figure 2-8 Alarm Input Connector Strips

AI 1 to 4 (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 for NC (Normally Closed) is above 4.3V and should be stable at least

0.5seconds to be detected. The threshold voltage for NO (Normally Open) is below 0.3V. See Chapter 3, Configuration for configuring alarm input.

GND (Ground)

Connect the ground side of the Alarm input to the GND connector.

ARI (Alarm Reset In)

An external signal to the Alarm Reset In can be used to reset both the Alarm Out signal and the internal buzzer of the DVR. 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 (Alarm Reset In) and GND (Ground) connectors.

Alarm Out

Figure 2-9 Alarm Output Connector Strips

The DVR can activate external devices such as buzzers or lights. Mechanical or electrical switches can be wired to the NC (Normally Closed) and C (Common) connectors or NO (Normally Open) and C (Common) connectors. The amount of current permitted is up to 0.5 A for 125 VAC, 1 A for 30 VDC. See Chapter 3, Configuration for configuring alarm output.

Document 800-00919 Rev F

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02/08