Connecting Audio Devices; Recording Audio; Connecting To An Ethernet Network - Dedicated Micros D4 Guía De Programación

Relay connections are as follows:
Pin Connection
1-2 Relay 1
3-4 Relay 2
5-6 Relay 3
7-8 Relay 4
Important Note: The onboard relays are rated at 24V 500mA, do not attempt to
connect mains power through the relays.

Connecting Audio devices

D4 can record and playback a single stream of audio linked to camera 1. There
are two audio input ports: MIC IN and LINE IN, and an audio output: LINE OUT.
Connecting a microphone to MIC IN.
Connect the microphone into the 3.5mm jack plug labelled MIC IN. It is important
to select the correct type of microphone for connection to the D4. D4 requires an
electret microphone with a sensitivity of –50dBV or better.
Connecting a pre-amplifier to LINE IN.
Where additional microphone gain and/or adjustable gain is required, an external
microphone pre-amplifier with adjustable gain is recommended. A microphone
pre-amplifier will provide a line level 1V pk-pk signal that can be connected to the
RCA socket labelled LINE IN on the D4.
The line level input has the following specification:
Line IN 47kΩ input impedance, 1V pk-pk
Action
Close on Alarm
Close on Activity Detection
Close on Camera fail
Undefined
Connecting the LINE OUT to an amplifier.
Connected the RCA socket labelled LINE OUT to an external amplifier or powered
loudspeakers.
The line level output has the following specification:
Line OUT 1V pk-pk

Recording audio

Once the microphone or pre-amplifier is connected to the D4, the option to
record audio should be enabled in the menu. See page 17 for details of enabling
audio recording.
It is advised that you test the quality of audio playback, it may be necessary to
increase the gain of the microphone
As the audio is linked to camera 1, it is required that camera 1 be viewed, either
in a full screen or in a quad view during playback to hear the audio.

Connecting to an Ethernet network

D4 can be connected to a standard 10-baseT Ethernet network allowing full
control of the D4 from a remote location.
Network connection
To connect a D4 to a network you will need the following items:
• A spare 10-baseT network point.
• A RJ-45 network cable (CAT5 or equivalent).
• A static IP address and Subnet mask (some networks may also require a
Default gateway, consult the network administrator for advice).
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