The Ethernet surge protector should be installed as close to the BreadCrumb as practical, and ideally
within 50 cm (20 in) of the device. The surge protector should be grounded as described in its operating
manual, and according to local electrical codes and industry best practices. When a BreadCrumb is pow-
ered through its Ethernet port (i.e., PoE), the surge protector should always be installed between the
BreadCrumb and its power source.
Warning
Warning
In order to avoid sparking and possible damage to the device, be sure to connect the surge protector
In order to avoid sparking and possible damage to the device, be sure to connect the surge protector
and the powered Ethernet cable to the BreadCrumb before applying power to the PoE power supply.
and the powered Ethernet cable to the BreadCrumb before applying power to the PoE power supply.
G.1.5 Antenna Surge Protection
Antenna surge protectors should be used for all pole-mounted BreadCrumb antennas. Consider the fol-
lowing aspects when choosing an antenna surge protector:
Rajant recommends the PolyPhaser GT-NFM-AL antenna surge protector ( www.streakwave.com, P/N:
GT-NFM-AL) (see Figure 2).
Figure 2: PolyPhaser GT-NFM-AL antenna surge protector.
Warning
Warning
In order to avoid sparking and possible damage to the device, be sure to connect the antenna surge pro-
In order to avoid sparking and possible damage to the device, be sure to connect the antenna surge pro-
tector to the BreadCrumb before applying power to the BreadCrumb power supply.
tector to the BreadCrumb before applying power to the BreadCrumb power supply.
G.1.6 The Goal: The Ground
The goal is to have a continuity of ground from the BreadCrumb to the destination AC ground or protec-
tive earth ground.
If the BreadCrumb uses an AC PoE, the ground pin of the AC plug should be plugged into a properly
grounded AC socket.
If the BreadCrumb uses a DC PoE, the grounding connections of the DC PoE should be properly connected
to an earth ground. Use 10 AWG or lower (larger) gauge wire for grounding cables and be careful to avoid
any sharp bends. Examples of earth ground are:
G.2 Waterproofing Rajant BreadCrumb RF Connections
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