CP143 H1 / TCP/IP manual
Network planning
Rev. 00/07
3-7
Guidelines for the routing and installation of network components
•
As a rule, a minimum distance of 1m is prescribed with respect to electrical equipment, cabling
and other components that could produce electromagnetic and electrostatic fields. This includes
parallel runs of power or high-tension cables, circuit breakers etc.
•
The ISO-specifications allow for a maximum field strength of 2 V/m at frequencies between 10
kHz and 30 MHz and 5 V/m at frequencies between 30 MHz and 1 GHz.
•
Once a coaxial cable segment and all its components have been installed it is essential that the
worst-case reflections on the cable are determined. These should never exceed 7% of the injected
amplitude of the original signal. The reflection coefficient can be checked by means of a
reflectometer.
•
The overall loop resistance of a coaxial cable segment together with all its plugs and connectors
may not exceed a maximum of 4
Ω
.
•
The minimum radius of any bend in the cable may not be less than 5 cm. When multiple bending
is anticipated the radius must not be less than 8 cm.
3.2.3 Technical data thin-ethernet
Coaxial cable
Impedance
50
Ω ±
2
Ω
Attenuation
≤
18 dB/km for a 10 MHz sine wave
≤
12 dB/km for a 5 MHz sine wave
Propagation
≥
0,77 c (velocity of light)
Minimum radius for bends,
single bend
5 cm
Minimum radius for bends,
multiple bends
8 cm
Diameter of center
conductorsolid copper
0,89 mm
±
0,05 mm
Outside diameter for
polyvinylchloride (PVC)
4,9 mm
Outside diameter for
fluorpolymer
4,8 mm
Содержание CP143 TCP/IP
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Страница 35: ...CP143 H1 TCP IP manual Network planning Rev 00 07 3 9 Fig 3 4 thick ethernet network hardware CP 143 H1 TCP IP ...
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Страница 196: ...Technical data CP143 H1 TCP IP manual A 2 Rev 00 07 ...
Страница 202: ...List of abbreviations CP143 H1 TCP IP manual C 2 Rev 00 07 ...
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Страница 210: ...Index CP143 H1 TCP IP manual F 4 Rev 00 07 ...