ASCOM Ascotel 2025, System Manual

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ascom Ascotel 2025/2045/2065
HBT_20321104_04/B0_en Cabling Interfaces 4.67
Installation Rules
• Always terminate the bus extremity with 2 x 100
W
(0.25 W, 5%)!
• If the subscriber cabling is integrated into the installation of a universal building
cable installation (UBC), cross-over the S bus see "Connection to a universal
building Cable Installation (UBC)", Page 4.32).
Cable Requirements
Tab. 4.41: Requirements for an S bus cable
Connection Sockets
Fig. 4.52: RJ45 connection, single socket (PIN assignment see Tab. 4.22)
Core pairs x cores
Stranded
Wire diameter, core
Screening 1 x 4 or 2 x 2
yes
0.4…0.6 mm
recommended
Ohmic resistance
Characteristic impedance
Wave attenuation
Near / crosstalk attenuation < 98
W
/km (conductor), < 196
W
/km (loop)
< 125
W
(100 kHz), < 115
W
(1MHz)
< 6 dB/km (100 kHz), < 26 dB/km (1MHz)
> 54 dB/100 m (1kHz to 1MHz)
c
f
e
d
Fit resistors at bus extremity only
a
b
c
f
e
d
g
h 1
2
3
4
5
6
7
8
RJ45, 8-pin
100
Ω
100
Ω
haz0026aaena0
Front view of RJ45
8
7
6
5
4
3
2
1
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