Physical Overview
37
RS-232C - Bus length and cable type
The maximum transfer rate of 115 kBit/s depends on the cable type being used.
The material used for the cable should preferably have all or most of the following
properties in order to reach an optimal transfer rate.
Distance [m]
Transfer rate [kBit/s]
15
Typ. 64
10
Typ. 115
5
Typ. 115
RS-232C cable
Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
4 x 0.16 mm² (26AWG), tinned Cu wire
PE
82
/km
Wires stranded in pairs
Paired shield with aluminum foil
Grounding line
Cable cross section
Wire insulation
Conductor resistance
1 x 0.34 mm² (22AWG/19), tinned Cu wire
PE
59
/km
Outer sheathing
Material
Characteristics
Entire shielding
PUR mixture
Halogen free
From tinned cu wires
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