GeoVision GV-AS2120 IP Control Panel - Manual (Page 132)

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6.2.4 Connecting Backup Battery
Using the supplied battery cable, you can connect any 12V battery to GV-EV48 to provide
backup power when the main power supply fails. When the main power supply is removed
and the battery voltage level is above 10.2V, the Discharging LED will light and the battery
will support normal operation of the GV-EV48.
2 1
NO
BAT
-
BAT
+
G
N
D
+12
V
B- B+ A- A+ B A
12V Battery
Black Red
Charging
Discharging
Power
Figure 6-5
6.2.5 Connecting the Power
You can connect GV-EV48 to power directly using the supplied 12V DC adaptor. After power
is connected, the power LED on GV-EV48 should glow.
Note:
Power should only be applied to the unit when all connections are completed and
tested.
Power
Source
12V DC / 3A
power adaptor
DC12V Micro SD Ethernet
Web
Setting
OFF
ON
Figure 6-6