Konnex Bus Technology; Cable Specification; Bus Cable (Rxb And Rxl); Bus Cable Technical Data - Siemens Desigo RXB Technical Manual

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4

Konnex bus technology

A detailed depiction is available in the Konnex manual (www.konnex.org).
4.1

Cable specification

4.1.1

Bus cable (RXB and RXL)

RXB and RXL controller communication is based on Konnex communications on
TP1 (TP = Twisted Pair).
The simplest form of the "Konnex TP1" bus comprises a two-core bus cable with
stranded lines CE+ (red) and CE- (black).
CE +
CE−
The following cables may be used depending on supply in a country:
YCYM 2x2x0.8
J-Y(St)Y 2x2x0.8
JH(St)H2x2x0.8
A-2Y(L)2Y or A-2YF(L)2Y
4.1.2

Bus cable technical data:

Bus cable requirement
Cable type
Strands
Diameter
Wave resistance (ideal value)
Line resistance
Cable screen
Bus terminating resistor
Installation guide RXB, RXL
Konnex bus technology
Fixed installation.
Dry, humid, wet rooms.
Outdoors (not exposed to sunlight).
Surface mounted, flush mounted, in pipes.
Fixed installation.
Indoors only.
Surface mounted, in pipes.
Halogen-free wire.
Laid at distance.
Remote cable.
Outdoor cabling.
IEC 189-2 (or equivalent)
two-core, stranded (red/black)
or 2x two-core, stranded (red/black
white/yellow)
or spiral quad
min. 5 / m
min. 0.8 mm, max. 1.0 mm
120 Ω at 100 kHz
20 Ω/km to max. 75 Ω/km
(Larger value requires a proportional
shortening of permissible cable lengths).
not required
(devices without screened connection)
Not required
CM110381en_01
28 Feb 2009