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5.3.2 Connection instruction (Example for Channel 1 recording)
Motherboard Ports
Audio out: to speaker (for
a. Connect the camera to camera input channel 1
b. Connect the audio source to the Channel 1 RCA connector of the splitter
c. Connect the splitter to the Audio-in RCA connector on the back panel of the
DVR
d. Connect a speaker to the Audio-out RCA connector on the back panel of the
DVR
5.4
External Alarm Input Connection
iFocus DVRs support two alarm inputs, T1 and T2.
These alarm inputs can be used for connection to external
dry contact switches such as PIR sensor or door switch. The
external dry contact alarm inputs can be used to trigger the
DVR into recording mode.
Figure 8 illustrates the connection between the terminal T1
of DVR and a sensor switch.
5.5
Alarm Output Connection and Disable Alarm
There are four alarm outputs provided. These outputs are
TTL type normally opened, which can sink up to 200mA
current. The details are as follows.
P1: Video loss
P2: Hard disk failure
P3: HD Full (98%)
P4: Alarm Indicator
Figure 9 illustrates the connection between a buzzer and the
terminal P1 of the DVR. During any loss of video signal, this output is "CLOSED" (sink
up to 200mA current) and shorted to ground. Te buzzer will sound when P1 is activated.
To stop the buzzer output, press "6" under the Main Menu.
5.5
Clear Alarm using External Trigger
The clear-alarm function can also be performed using External Trigger 2. The following
diagram shows the programming to clear alarm using external trigger 2.
Audio in: To Mono to
Stereo Splitter and
Audio Source
local playback)
Figure 7: Connection, Audio Feature
Page 8 of 40
iFocus DVRA+/B+/E+ Manual Version 4.2
To camera
1
source
2
3
4
Figure 8: Connection, External
Alarm Input
IR+
IR-
T1
T2
Gnd
P1
P2
Gnd
P3
P4
Figure 9: Connection, Alarm Output
IR+
IR-
T1
T2
Gnd
P1
P2
Gnd
P3
P4
12V DC
Buzze
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