Operating instructions

Passive Components for Electrical Networks
4-17
SIMATIC NET Tw isted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
Technical Specifications
Table 4-8 Electrical Data of the Twisted-Pair Cord at 20
o
C
Cable category
(EN 50173)
CAT5
DC loop resistance maximum 300 Ω/km
DC insulation resistance minimum 150 MΩ xkm
Attenuation/100 m at 4 MHz
10 MHz
100 MHz
maximum 5.7 dB
9.0 dB
28.5 dB
Near end crosstalk
loss
(NEXT)/100 m
at 4 MHz
10 MHz
100 MHz
minimum 80.0 dB
80.0 dB
72.5 dB
Char. impedance at 1 to 100 MHz 100 Ω±15%
Transfer impedance at 10 MHz maximum 10 mΩ/m
Structural return loss at 1 to 20 MHz
20 to 100 MHz
minimum 23 dB
23 dB -- 10log(f/20)
Longitudinal c onversion
loss
minimum 43 dB
Capacitance unbalance
pair to ground
at 1 kHz maximum 1600 pF/km
Dielec. strength at 50 Hz
--conductor/conductor
-- conductor/shield
1min
1min
effective value
700 V
700 V