Other Interfaces; Audio Input/Audio Output; Alarm Input And Relay Output; Alarm Input - Videovox Pro DVR User Manual

Atm series standalone dvr

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2.7 Connecting Audio Input & Audio Output, Alarm Input &Alarm Output,

RS232/RS485 and Other Interfaces

ATM04 has 3-ch audio input, 1-ch audio output, 4-ch alarm input and 3-ch alarm

output.

The DVR encodes audio and video signals simultaneously, which lets you control

audio at the monitored location.

To set up audio:

1. Make sure your audio input device matches the RCA input level. If the device and

RCA input levels do not match, audio distortion problems may occur.

2. Make sure the audio connector is wired as follows:

3. Connect a line input device or pre-amplified microphone to the audio connector for

the video channel on the rear panel.

Please refer to Figure 2-3.

Figure 2-3

The DVR offers 4-ch alarm input for external signaling devices, such as door contacts

or motion detectors. Each alarm input can be either normally open or normally closed.

Once configured, an alarm input can invoke many different activities, including

triggering a relay device, sending an alert to a security office or storing pre-alarm

video to the DVR.

You should check your alarm input mode is grounding alarm input or not.

For this series DVR, grounding signal is needed for alarm input.

If you need to connect two units or one DVR and other device, please use relay to

separate them.

Please refer to Figure 2-4 for more information.

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