Bus Topologies - Siemens Desigo TRA Engineering, Mounting And Installation Manual

64 devices
on one line
Notes
Permissible bus
topologies
Advantage:
Tree topology
Branching and
connection variants
Siemens
Building Technologies

12.2 Bus topologies

Up to 64 devices with KNX PL-Link can be installed on one line (main line as well).
No restrictions apply to the type mix.
There is no need to calculate the bus load number E for up to 64 devices.
A maximum of 64 devices may be installed even if devices requiring less power
are used.
Permissible bus topologies are: Tree, line, and star topologies. These topologies
can be mixed as needed. However, ring topologies are not allowed.
The tree topology is advantageous if a large network must be created.
Tree topology (with stub lines)
PL-Link
KNX PL-Link
N1 .. N7 Devices
Device with screw terminals
KNX
+ -
KNX+
KNX-
N1 .. N8 Devices
Desigo TRA Engineering, mounting and installation
KNX PL-Link room bus
Line topology (with loops)
PL-Link
KNX PL-Link
T branch with bus terminals
CE+
CE-
CE+ CE-
Device with spring cage
terminals
CE+ CE- CE+ CE-
59 / 84
CM111043en_09
2016-02-22