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Common Control Equipment Installation
Figure 11: Central "Star" Grounding System
Radio
Radio
PBX/CO
Do not connect signal ground to the central "star" ground. The conditioning and reference of the
signal grounds is controlled inside the Zetron equipment. The system will be more susceptible to
noise interference.
40
Common
Control
Units
Series 4000
Common
Control
Protected
Punch-down
Block
A
B
Phone
Interface
EARTH GROUND
#0 AWG or Larger
CRT
M4217B
PC
Ground Wires
#14 AWG or Larger
Copper or Aluminum
Ground Plates
TRHI
Model
4018
Desktop
Dispatch
Consoles
Model
4118
Model
4115
Rack-Mount
Dispatch
Consoles
Headset
Jack
025-9533Y
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