Installation Instructions

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Siemens Desigo Desigo Room automation - Engineering, mounting and installation CM111043en_14

Smart Infrastructure KNX PL-Link room bus 2020-10-30

13.2 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) Line topology (with loops)

PL-Link

N1 .. N7 Devices

Device with screw terminals T branch with bus terminals Device with spring cage

terminals

N1 .. N8 Devices

CE+

CE-

KNX+

KNX-

+ -

KNX

CE+

CE-

CE+

CE-

64 devices

on one line

Notes

Permissible bus

topologies

Advantage:

Tree topology

Branching and

connection variants

KNX PL-Link KNX PL-Link