Data Sheet for Product

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Building Technologies Data sheet KNX bus CE1N3127en
HVAC Products 18.02.2008
Distances and line lengths (examples)
100 m
N1
N4
3127Z03en
N2
200 m
100 m
100 m400 m
Distance between
bus devices max. 700 m.
Not allowed:
N1 to N4 = 900 m
N2 to N4 = 800 m
N3
100 m
250 m150 m
Distance between bus device
and bus supply max. 350 m.
Not allowed: N4 = 550 m
PSU
N1…N4 Bus devices
Bus device N4, by adhering to the maximum distance of 700 m between bus devices,
cannot be integrated in the bus if bus device N3 is integrated with a loop (instead of
subline).
If the maximum distance between the centralized bus supply PSU and the bus device
(without bus supply) is 350 meters, the bus supply must be placed at 150 m / 250 m on
the 400 meter line.
100 m
N1
N4
3127Z04en
N2
200 m
100 m
100 m400 m
N3
200 m
100 m
N5
Total lenght
max. 1000 m,
exceeded by
N5
N1…N5 Bus devices
The permissible total length of 1000 m in the line is exceeded, if device N5 is integrated
in the bus at the given bus wiring.
Example 1
Distances
Example 2
Total length