User's Manual

Table Of Contents
Chapter 3 - Installation
Technical User Manual
InfiLINK XG
38
Building
grounding
circuit
LAN
switch
IDU
ODU
220V
Three-wire power
cable should be
used to ground
the IDU
Antenna pole
A separate grounded protection device
should be installed between the ODU
and the antenna, on each of the 2 RF
cables, in case the antenna has no DC-
short protection circuit.
STP Cat.5e
AUX-ODU-
LPU-G
AUX-ODU-
LPU-G
Short distance (mount
upper AUX-ODU-LPU-G
close to ODU)
Long distance (the majority
of IDU-ODU cable run
should be between the 2
AUX-ODU-LPU-G)
Short distance (mount
lower AUX-ODU-LPU-
G close to IDU)
Pole grounding
RF cables
ODU Grounding clamp
ETH OUT
UTP/STP
Cat.5e
Figure 24 - Grounding Connections Schematics when Using AUX-ODU-LPU-G
For maximum protection of the ODU, IDU and customer LAN devices, use 2 AUX-
ODU-LPU-G connected as shown in the diagram. The purpose of the LPU at the
top is to protect the ODU from a surge of lightning strike which can hit the long
STP cable run along the height of the pole or on the roof of the building. The
purpose of the LPU at the bottom is to protect the IDU and customer equipment.
Make sure to install the 2 LPU devices in the correct polarity, as shown in the
diagram: top LPU with ETH OUT facing the ODU and bottom LPU with ETH OUT
facing the IDU, and the 2 LPU units connected to each other via ETH IN.
Install each LPU as close as possible to the device it protects. The cable length
between the top LPU and ODU should be minimum, as well as the cable length