Dahua 42212TNI, Руководство по установке системы

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6
SYSTEM POWER REQUIREMENTS AND SOURCES
Dahua cameras and the Multi-Sensor Data Acquisition Unit (MSDAU) both use Power
over Ethernet (PoE) for a power source as well as for the Ethernet signal to a computer
or router. The hardware required to do that is a PoE Injector or Injector/Switch. This is
a small device that is powered from a 115VAC, 50/60Hz source. An Ethernet cable
connects the computer or router to the Injector and another connects the Injector to the
camera or a MSDAU. When an MSDAU has an integrally-mounted camera, then
electronics within the MSDAU splits or shares the PoE power/signal cable to provide for
both the MSDAU electronics as well as the camera. Thus, only a single cable is used
with such a system.
115VAC power for an Injector and possibly a computer may simply be from a wall-outlet
in a fixed installation or from a portable source such as a DC-to-AC inverter powered by
an automotive 12VDC source or from a solar/battery system.
Sizing a power source for a remote UFODAS installation is based on the total power
required and run time until recharged if battery storage is included.
The approximate maximum power requirements for UFODAS components are:

50230UNI-A camera – 23W max.

42212TNI camera – 12W

NK8BR4 camera – 12W

MSDAU – 4W

PowerBeam Ethernet Bridge – 8.5W (from a separate PoE Injector, included)
Thus, for example, the total system power required for a field installation that includes
the panoramic camera, a 50230 camera, an MSDAU and an RF bridge to a remote
router would be 47.5W. Thus this system could run continuously with a 100W solar
panel during the day and continue during the night using battery storage in the GoalZero
Portable Power Station, shown below. The Power Station provides a 396WH battery
and thus could sustain the 47.5W load for up to about 8 hours without recharging.
Additional 33Ah batteries could be added for longer run times.
The Power Station may be recharged by plugging it into an AC outlet or charged in the
field by means of a 100W (or larger) solar panel, as shown below.