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Chapter 5: Installation
Safety
DC supply
To power the ODU from a DC supply, use the AC+DC Enhanced Power Injector (PSU) (Cambium
part number C000065L002). Ensure that the DC power supply meets the requirements specified in
PSU DC power supply
on page 3-12.
Powering down before servicing
Before servicing PTP 650 equipment, always switch off the power supply and unplug it from the
PSU.
Do not disconnect the RJ45 drop cable connectors from the ODU while the PSU is connected to the
power supply. Always remove the AC or DC input power from the PSU.
Primary disconnect device
The main power supply is the primary disconnect device. The AC+DC Enhanced power injector is
fused on the DC input. Some installations will also require an additional circuit breaker or isolation
switch to be fitted in the DC supply.
External cables
Safety may be compromised if outdoor rated cables are not used for connections that will be
exposed to the outdoor environment. For outdoor copper Cat5e Ethernet interfaces, always use
Cat5e cable that is gel-filled and shielded with copper-plated steel. Alternative types of drop cable
are not supported by Cambium Networks.
Drop cable tester
The PSU output voltage may be hazardous in some conditions, for example in wet weather. Do
NOT connect the drop cable tester to the PSU, either directly or via LPUs.
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.
Page
5-3
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