Motorola DIMETRA MTS 2, Installation, Configuration And Basic Service Manual

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MTS 2 and MTS 4 Installation, Con
fi
guration and Basic Service Manual Grounding Connection
•
Site Link Cables
•
Alarm System Cables
Proper surge protection should be installed on E1/X.21 site links, all antennas and power
inputs to prevent potential damage to the MTS. For more information, please refer to
"Surge
Arrestors and Suppliers" in Appendix A, "Field Replaceable Units (FRUs)" .
For full instructions and guidelines, please refer always to
Motorola Standards
and Guidelines for Communications Sites, R56
.
Grounding Connection
Various cabling from the equipment cabinet to external equipment is made through the MTS Junction Panel
located at the top-rear of the equipment cabinet. The Junction Panel is accessed from the top of the cabinet.
Depending on system con
fi
guration, not all connector locations on Junction Panel are populated.
Cabinet grounding wires may have been installed prior to the cabinet installation. If
so, follow the instructions below.
If grounding wires have not yet been installed, refer to "Grounding Requirements"
in Chapter 3, "Site Preparation" .
Single-point ground method (where each cabinet is grounded to master ground using its own
ground wire) shall be used. The cabinet shall use green (or green-yellow) insulated wire with
a minimum size of 16 mm
2
CSA (#2 AWG) for ground wire.
The MTS is connected to the site ground through the M10 station ground point located on the
junction panel, see
Figure 4-12 for MTS 2 and Figure 4-13 for MTS 4. This connection is essential
for the protection of the equipment against lightning induced surges.
If the speci
fi
ed wire size is not available, use the next-larger available wire size. During the installation of
cabinet ground wires, ensure to check any factory-installed internal ground connections for tightness.
Figure 4-12 and Figure 4-13 depicts the newer version of the MTS Junction Panel.
There may be small differences in older con
fi
gurations.
6802800U74-N September 2009
4-17