Siemens SIMATIC ET 200SP CM 1xDALI - Page 21

Wiring
3.4 Block diagram
ET 200SP Communication module CM 1xDALI (6ES7137-6CA00-0BU0)
20 Manual, 06/2019, A5E46959434-AA
L+/M supply voltage
You connect the supply voltage (DC 24 V) to terminals L+ and M on a light BaseUnit. For a
dark BaseUnit, it uses the supply voltage of the module on its left. An internal protection
circuit protects the CM 1xDALI from reverse polarity of the supply voltage. The CM 1xDALI
monitors whether the supply voltage is connected.