Installing the Equipment
The terminal marked at the rear panel is a Technical Earth. Its use is
recommended. This is NOT a protective earth for electric shock protection. The
terminal is provided to:
1.
Ensure all equipment chassis fixed within a rack are at the same technical earth
potential.
2. Eliminate the migration of stray charges when connecting between equipment.
To do this, connect a wire between the Technical Earth terminal and a suitable
point on the rack.
The Technical Earth provides a suitable connection between the equipment and the
installation to give a low impedance path at normal operating frequencies.
Figure 2.6 Position of Technical Earth
Technical Earth
2.8 Signal Connections
2.8.1 General
Caution!
It is strongly recommended that the terminal marked at the rear panel of the
equipment is connected to a site Technical Earth before any external connections
are made and the equipment is powered. This limits the migration of stray charges.
Figure 2.7 Typical SPR1100 Rear Panel (model shown SPR11/CHASSIS/1AC)
AC Input
Slot 2
Slot 1
Data Ethernet
x4
Control Ethernet x2
Slot 4 Slot 6
Slot 3 Slot 5
2/1553-FGC 101 1400 Uen B
2-12
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