![Cambium Networks PMP 450 Скачать руководство пользователя страница 46](http://html.mh-extra.com/html/cambium-networks/pmp-450/pmp-450_planning-manual_485741046.webp)
PMP 450 Planning Guide
Cabling and lightning protection
This section describes the cabling and lightning protection components of a PMP 450 installation.
PMP and lightning protection
Due to the full metallic connection to the tower or support structure through the AP antenna, grounding the AP and
installing a 600SS surge suppressor at the Ethernet cable building ingress is strongly recommended. This
suppresses overvoltages and overcurrents such as those caused by near-miss lightning. APs provide a grounding
lug for grounding to the tower or support structure.
The PMP 450 Series is not designed to survive direct lightning strikes. For this reason the unit should not be
installed as the highest point in a localized area.
Outdoor connections
The term ‘drop cable’ refers to the cable that is used for all connections that terminate outside the building, for
example, connections between the AP/SM, surge suppressors (if installed), GPS receivers (if installed) and the
power supply injector.
The following practices are essential to the reliability and longevity of cabled connections:
•
Use only shielded cables and connectors to resist interference and corrosion
•
For vertical runs, provide cable support and strain relief
•
Include a 2 ft (0.6 m) service loop on each end of the cable to allow for thermal expansion and contraction and
to facilitate terminating the cable again when needed
•
Include a drip loop to shed water so that most of the water does not reach the connector at the device
•
Properly crimp all connectors
•
Use dielectric grease on all connectors to resist corrosion
1-36
pmp-0047 (March 2014)
Содержание PMP 450
Страница 1: ...Cambium PMP 450 Planning Guide System Release 13 1 ...
Страница 13: ...PMP 450 Planning Guide pmp 0047 March 2014 1 3 ...
Страница 30: ...PMP 450 Planning Guide Radio tab of the AP Figure 8 Radio tab of the AP 1 20 pmp 0047 March 2014 ...
Страница 41: ...PMP 450 Planning Guide Radio tab of the SM Figure 13 Radio tab of the SM pmp 0047 March 2014 1 31 ...
Страница 42: ...PMP 450 Planning Guide Figure 14 Custom Frequency tab of the SM 1 32 pmp 0047 March 2014 ...
Страница 58: ...PMP 450 Planning Guide Figure 16 AP web based management screenshot 1 48 pmp 0047 March 2014 ...
Страница 82: ...PMP 450 Planning Guide 1 72 pmp 0047 March 2014 ...
Страница 155: ...PMP 450 Planning Guide pmp 0047 March 2014 1 145 ...