2N IP Video Kit, Руководство по установке

Страница: 35 / 66

2N TELEKOMUNIKACE a.s., www.2n.cz 35/66
Warning
When you connect a device containing a coil, such as a relay or an
electromagnetic lock, it is necessary to protect the intercom against voltage
peak while switching off the induction load. For this way of protection we
recommend a diode 1 A / 1000 V (e.g., 1N4007, 1N5407, 1N5408) connected
antiparallel to the device.
Main Unit
Power Supply Connection
2N IP Base
®
can be powered either from an external 12 V / 2 A DC source or directly
from the LAN equipped with PoE 802.3af supporting network elements.
External power supply
Use a 12 V ±15 % SELV supply dimensioned to the minimum current consumption of 2
A (Part No. 91341481E) to make your system work reliably. This power supply provides
with 24 W for feeding of the main unit. 2N IP Base
®
PoE Power Supply
2N IP Base
®
is compatible with the PoE 802.3af (Class 0–12,95 W) technology and can
be fed directly from the LAN via the compatible network elements. If your LAN does
not support this technology, insert a PoE injector, Part No. 91378100, between 2N IP
®
and the nearest network element. This power supply provides with Base 2N IP Base
®
12 W for feeding of the main unit.