Cambium Networks PMP 450 Series, Installation Manual

Page: 103 / 292

Chapter 2: System hardware 103
One LPU and grounding kit (LPU and grounding kit contents) is required for the PSU drop cable
connection to the ODU. If the ODU is to be connected to an auxiliary device, one additional LPU and
grounding kit is required for the Aux drop cable. Order the kits from Cambium Networks (LPU and
grounding kit part number).
Table 77 :LPU and grounding kit part number
Cambium description Cambium part number
Aux ports LPU and Grounding Kit (One Kit Per End) C000065L007B
When using LPUs on the Ethernet Ports of the 3 GHz 450m, a separate PoE power supply must be used at
the bottom of the mast to forward bias the diodes in the LPUs. This should be placed in the same position
as used in a PoE Ethernet Port. If this is not done, CRC errors will occur on the Ethernet interface.
DC LPU and Gr ound ing Kit
450m 3 GHz LPUs provide transient voltage surge suppression for ODU installations. Each cable requires
two LPUs, one near the ODU and the other near the linked device, usually at the building entry point.
Table 78 :DC LPU and grounding kit contents
Lightning protection units (LPUs)
LPU grounding point nuts and washers EMC strain relief cable glands