Siemens SIMATIC ET 200SP CM 1xDALI Manual page 18

DALI bus topology
CM 1xDALI is a gateway between automation system and DALI system. At the CPU side,
CM 1xDALI works as a communication module and gateway to the system. At DALI side,
CM 1xDALI works as an application controller. You can use line, tree, star or mixed
structures to set up the DALI system.
NOTICE
Important notes on setting up DALI system
• Do not use ring structure to set up a DALI system.
• Use the input devices which fulfill the DALI-2 standard.
• CM 1xDALI module cannot work until CPU and IM are ready. Make sure CPUs are
The following figure shows an example of a DALI topology containing 4 DALI systems.
Figure 3-1 DALI Topology
ET 200SP Communication module CM 1xDALI (6ES7137-6CA00-0BU0)
Manual, 06/2019, A5E46959434-AA
ready before you start up the DALI communication.
Wiring
3.3 DALI bus cable
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