Motorola PTP 250 User Manual page 4

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:
•
The voltage and polarity is correct and is applied to the correct terminals in the PIDU.
•
The power source is rated as Safety Extra Low Voltage (SELV).
•
The power source is rated to supply at least 1 A 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).
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.
Non-Motorola power supply
Safety may be compromised if a different power supply is used than the one supplied by
Motorola as part of the system.
Drop cable tester
The drop cable tester must NEVER be used at the ODU end connected to power from the
PoE power supply. It must only be used at the bottom of the mast with a multimeter. 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.
II
UNDER DEVELOPMENT
Safety and regulatory information
phn-2182_003v004 (Oct 2011)