ASCOM Ascotel 2025 System Manual page 838

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
Core pairs x cores
Stranded
Wire diameter, core
Screening
Ohmic resistance
Characteristic impedance
Wave attenuation
Near / crosstalk attenuation
Connection Sockets
haz1127aaxxa0
Fig. 4.52: RJ45 connection, single socket (PIN assignment see Tab. 4.22)
HBT_20321104_04/B0_en
1
2
c
3
4
f
5
e
6
7
d
8
ascom Ascotel 2025/2045/2065
1 x 4 or 2 x 2
yes
0.4...0.6 mm
recommended
< 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)
RJ45, 8-pin
1 a
2 b
3 c
4 f
5 e
6 d
7 g
8 h
haz0026aaena0
Fit resistors at bus extremity only
Cabling Interfaces
Front view of RJ45
4.67