Cambium Networks PTP 650 Series, Руководство пользователя

Страница: 97 / 395

Chapter 3: System planning Site planning
Note
For a connectorized ODU, add the wind loading of the external antenna to that of the
ODU. The antenna manufacturer should be able to quote wind loading.
PSU DC power supply
If using the DC input on the AC+DC power injector, ensure that the DC power supply meets the
following requirements:
•
The voltage and polarity must be correct and must be applied to the correct PSU terminals.
•
The power source must be rated as Safety Extra Low Voltage (SELV).
•
The power source must be rated to supply at least 1.5A continuously.
•
The power source cannot provide more than the Energy Hazard Limit as defined by
IEC/EN/UL60950-1, Clause 2.5, Limited Power (The Energy Hazard Limit is 240VA).
PSU location
Find a location for the PSU (AC Power Injector or AC+DC Enhanced Power Injector) that meets the
following requirements:
•
The AC+DC Enhanced Power Injector can be mounted on a wall or other flat surface. The AC
Power Injector can be mounted on a flat surface.
•
The PSU is kept dry, with no possibility of condensation, flooding or rising damp.
•
The PSU is located in an environment where it is not likely to exceed its operational
temperature rating, allowing for natural convection cooling.
•
The PSU can be connected to the ODU drop cable and network terminating equipment.
Find a location for the AC+DC Enhanced power injector where it can be connected to a mains or
DC power supply. The use of DC supplies of less than 55V will reduce the usable distance between
the PSU and ODU.
Page
3-12