Siemens Synco 700 Series Basic Documentation page 24

Example 1
Distances
Example 2
Total length
24/120
Building Technologies
HVAC Products
N1
200 m
150 m
100 m
Distance between bus device
and bus supply max. 350 m.
Not allowed: N4 = 550 m
N2
N1 .. N4 Bus devices
Bus device N4 – while adhering to the maximum distance of 700 m between bus
devices – cannot be integrated on the bus if bus device N3 is integrated with a loop
(instead of a sub-line).
If a maximum distance of 350 m is maintained between the central bus power
supply PSU and a bus device without a bus supply, the bus power supply unit must
be located at the point between 150 m and 250 m on the 400 m section shown.
N1
200 m
100 m
N2
N1 .. N5 Bus devices
With the bus wiring shown, the integration of device N5 on the bus causes the
permissible total length of 1000 m to be exceeded.
Basic documentation: Communication via the KNX bus
Engineering notes
400 m
PSU
250 m
400 m
Distance between
bus devices max. 700 m.
Not allowed:
N1 to N4 = 900 m
N2 to N4 = 800 m
100 m
100 m 100 m
N3
N5
Total lenght
max. 1000 m,
exceeded by
N5
200 m
100 m
100 m
100 m
N3
CE1P3127en
30.08.2007
N4
N4