Siemens Desigo RXB Technical Manual page 465

Technical manual
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Cable cross section
Siemens
Building Technologies
Very good:
Stranded cable with solid coverage
Sufficient:
Foil screens
Insufficient:
Vaporized screening
No equipotential bonding current may flow over the cable screen.
The absence of equipotential bonding may be required within the same zone or
floor. In case of doubt or for connection over larger distances, e.g. between various
buildings, the one end of the cable is connected to the structure galvanically, the
other capacitive.
Condenser: Self-correcting metal foil condenser ca. 100 nF, min. 250 V.
Do not breach required wiring cross sections.
The bus wire (KNX, PPS2) cannot be wired in parallel to increase the cross
section. Parallel wiring is, however, permitted for power, valve actuators and
analog signals, e.g. temperature sensors.
Installation guide RXB, RXL
Periphery wiring (without bus)
11 / 22
CM110381en_01
28 Feb 2009

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Desigo rxc, desigo rxb, desigo rxl, desigo rxa

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