Kipp&Zonen COMBILOG Data Logger - Manual (Page 91)

Note: These specifications refer to bus cables with a conductor
cross section of 0.22 mm² and a permissible signal attenuation
of max. 6 dB referred to the overall length. According to previ-
ous experience the line length can be twice as long if a two-
wire circuit with a conductor cross section of at least 0.5 mm² is
used.
10.4 Bus Cable
For setting up a bus topology a shielded twisted pair with at
least two leads and the following electric characteristic values
should be used:
 characteristic impedance : 100 ... 130 Ω at f > 100 kHz
 operating capacity : max. 60 pF/m
 conductor cross section : min. 0.22 mm² (AWG 24)
 attenuation : max. 6dB referred to the
overall length
Hardware Manual COMBILOG 1022
91