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Siemens  Wall-mounted sensors and room operator units for KNX/ETS and KNX/ACS  CM2N1602en_05 
Building Technologies  Devices   2018-09-14 
1.4  Service and connection elements 
R1  QMX3... Room operator unit 
N1  Controller, actor 
Twisted pair 
Service LED (red) 
Pr
ogramming pin 
The s
ervice element functions are described Commissioning, sections 5.2 and 6.2. 
The dev
ices are supplied with peel-off adhesive address labels containing the 
unique KNX ID as alphanumeric and barcode display. 
The addr
ess label can peeled off the device during mounting and stuck to a floor 
plan or similar. The floor plan thus contains the assignment of KNX IDs and 
physical installation location. This greatly simplifies the following steps. In addition, 
the procedure serves as the basis for the recommended engineering and 
commissioning process. If the adhesive labels are lost, all information is still 
available in printed form on the housing. 
Service LED (red) and 
programming pin 
Simplifying engineering 
and commissioning