2N Helios IP Video Kit Installation Manual page 14

Connection of External Power Supply
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2N Helios IP Video Kit can be supplied either from an external 9-36/2A DC source
or directly from the LAN provided with the PoE 802.3af supporting network elements.
External Power Supply
Connect the external 12V power supply to the DC in terminals. Use safety low-voltage
voltage (SELV, 9-36V) dimensioned for the minimum current consumption of 1.5A (Part
No. 91341481E, e.g.) to make your device work correctly.
PoE Supply
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2N Helios IP Video Kit is compatible with the PoE 802.3af technology (Class 0 –
12.95W) and can be supplied directly from the LAN via compatible network elements. If
your LAN lacks such compatible elements, you can insert a PoE injector, Part
No. 91758100E, between your
element. Connect your
supply it successfully.
Caution
Connection of LED Indicators
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2N Helios IP Video Kit is equipped with three independent current LED control
outputs (LED1+, LED2+ and LED3+- terminals). All of them are current outputs
(20mA, up to 12V). You can connect the LEDs directly to the terminals of these outputs
or use LEDs with serial resistors. Mind the polarity while connecting the LEDs to make
your device work properly.
The functions of the LED1, LED2 and LED3 outputs are programmable; refer to the
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Helios IP Configuration Manual
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2N TELEKOMUNIKACE a.s., www.2n.cz
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2N Helios IP Video Kit
In case you feed your
limited-power external power supply, monitor the power consumption of
the whole system. With regard to the PoE 802.3af capacities and
efficiency of the switched-mode power supplies in the device, the
maximum possible device input is approximately 12W. An overload of the
PoE source usually results in PoE disconnection and, subsequently, 2N
Helios IP Video Kit
®
The 2N Helios IP Video Kit
inactive, no load switched on LED1-3 and OUT1-2 outputs) is up to 2W.
The maximum power amplifier consumption is determined by the current
loudspeaker volume level and impedance (up to 10W for a 4Ω
loudspeaker). The real consumption is typically lower and depends on the
characteristics of the signal to be amplified.
If you intend to connect a considerable load to the OUT1 and OUT2
outputs, make sure that the total input does not exceed the above
mentioned limit (12W for PoE). If the PoE supply fails to provide sufficient
power for the specific application, use a more powerful external source to
make your device work perfectly.
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2N Helios IP Video Kit
to the LAN via the LAN1 interface to
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2N Helios IP Video Kit
restart.
consumption at relax (power amplifier
for details.
and the nearest network
via PoE or from a
14
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2N