To prevent loss of life or physical injury, observe the below safety guidelines. In no event shall
Cambium Networks be liable for any injury or damage caused during the installation of the
Cambium PTP 650. Ensure that only qualified personnel install a PTP 650 link.
Power lines
Exercise extreme care when working near power lines.
Working at heights
Exercise extreme care when working at heights.
Grounding and protective earth
The Outdoor Unit (ODU) must be properly grounded to protect against lightning. It is the user’s
responsibility to install the equipment in accordance with national regulations. In the USA,
follow Section 810 of the National Electric Code, ANSI/NFPA No.70-1984 (USA). In Canada, follow
Section 54 of the Canadian Electrical Code. These codes describe correct installation procedures
for grounding the outdoor unit, mast, lead-in wire and discharge unit, size of grounding
conductors and connection requirements for grounding electrodes. Other regulations may apply
in different countries and therefore it is recommended that installation of the outdoor unit be
contracted to a professional installer.
PSU
Always use one of the Cambium PTP 650 Series power supply units (PSU) to power the ODU.
Failure to use a Cambium supplied PSU could result in equipment damage and will invalidate
the safety certification and may cause a safety hazard.
Alternative DC supplies
If an AC supply is not required or an additional back up DC supply is required, the DC supply is
connected to the PSU DC IN terminals. This is the only method of supplying external DC to the
ODU. The DC supply must comply with the following requirements:
•The voltage and polarity is correct and is applied to the correct PIDU terminals.
•The power source is rated as Safety Extra Low Voltage (SELV).
•The power source is rated to supply at least 1A 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).