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System data
Bus connection
Cable type YCYM 2 × 2 × 0.8 mm
2
one wire pair (red, black) for signal trans-
mission and power supply, one wire pair
(yellow, white) for additional applications
(SELV or voice)
Cable lengths
Total length of one line
(wire diameter: 0.8 mm)
max. 1,000 m
(including all branches)
Length between two
bus devices
max. 700 m
Length between a bus
device and the power
supply (320 mA)/choke
max. 350 m
Length between power
supply (320 mA) and choke
mounted side by side
Bus devices
Number of areas max. 15
Number of lines per area max. 15
Number of bus devices
per line
max. 64
Topology linear, star or tree structure
Power supply
System voltage DC 24 V (safety extra-low voltage ‒ SELV)
Power supply per line one power supply (160, 320 or 640 mA)
Transmission
Transmission technology decentralized, event-controlled, serial,
symmetrical
Baud rate 9,600 bit/s
Device properties
Protection class acc.
to EN 60529
IP20
Safety measure Bus: safety extra-low voltage ‒ SELV DC 24 V
Overvoltage category III
Rated insulation
voltage U
i
250 V
Pollution degree 2
EMC requirements complies with EN 50081 1 and prEN
50082 2 (severity grade 3), prEN 50090 2 2,
KNX/EIB manual
Resistance to climate
changes
prEN 50090 2 2, KNX/EIB manual
Conditions for use
Application for fixed installation indoor
for dry rooms
for installation in power distributors
Ambient temperature
during operation
-5 °C to +45 °C
Humidity during
operation
max. 93%
Storage temperature -40 °C to +55 °C
Humidity during storage max. 93%
Certification KNX/EIB-certified
CE certification acc. to EMC directive (residential and com-
mercial buildings), low-voltage directive
Bus systems