Safety and regulatory information
II
phn-2510_002v000 (Mar 2012)
Alternative DC supply
If the PTP 250 is to be powered from a DC supply (either as the primary power source or
as a backup to the AC supply), the DC supply must be input to the ODU via a PIDU (not a
PoE power supply). The DC supply must be connected to the PIDU DC IN terminals. The
DC supply must comply with the following requirements:
x
The voltage and polarity is correct and is applied to the correct terminals in the PIDU.
x
The power source is rated as Safety Extra Low Voltage (SELV).
x
The power source is rated to supply at least 1 A continuously.
x
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).
Powering down before servicing
Always power down and unplug the equipment before servicing.
Lightning protection unit (LPU)
Do not remove the LPU printed circuit board when the LPU is connected to the power
supply, as high voltages are present.
Drop cable tester
The drop cable tester must NEVER be used at the ODU end connected to power from the
PoE power supply or PIDU. It must only be used (with a multimeter) to test a cable with
an ODU attached, not a cable with a PoE power supply or PIDU attached. This is because
the PoE power supply voltage exceeds the limit allowed in some countries for safe
handling in wet conditions and therefore may create a safety hazard.
Primary disconnect device
The main power supply is the primary disconnect device.
External cables
Safety may be compromised if outdoor rated cables are not used for connections that will
be exposed to the outdoor environment.
RF exposure near the antenna
Strong radio frequency (RF) fields will be present close to the antenna when the
transmitter is on. Always turn off the power to the ODU before undertaking maintenance
activities in front of the antenna.
Содержание PTP 250
Страница 1: ...Cambium PTP 250 User Guide System Release 250 02 01 ...
Страница 8: ...Safety and regulatory information VI phn 2510_002v000 Mar 2012 ...
Страница 20: ...List of Tables xii phn 2510_002v000 Mar 2012 ...
Страница 58: ...System management Chapter 1 Product description 1 30 phn 2510_002v000 Mar 2012 ...
Страница 104: ...Limit of liability Chapter 3 Legal information 3 12 phn 2510_002v000 Mar 2012 ...
Страница 122: ...Notifications Chapter 4 Reference information 4 18 phn 2510_002v000 Mar 2012 ...
Страница 152: ...Installing the PoE power supply Chapter 5 Installation 5 30 phn 2510_002v000 Mar 2012 ...