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Siemens  Wall-mounted sensors and room operator units for KNX/ETS and KNX/ACS  CM2N1602en_05 
Building Technologies  Mounting and electrical installation   2018-09-14 
3  Mounting and electrical installation 
Comply with the following notes as well as the mounting instructions [2] to mount 
the room sensor.  
Note the permissible ambient temperature and humidity. See data sheet [1] for 
environmental conditions. 
• T
he devices are suitable for wall mounting.
• Recommended height: 1.50 m above floor.
• Do not mount the devices in recesses, shelves, behind curtains or doors, or
above or near heat sources.
• Avoid direct solar radiation and drafts.
• Seal the conduit box or the installation tube, as air currents can affect sensor
readings.
• Adhere to allowed ambient conditions.
• Moun
ting instructions M1602 are enclosed with the devices.
Service LED (red)      Tool plug       Programming pin    
*)  T
he installing tube must be sealed or cold or warm air may enter the device and 
cause faulty temperature readings by the internal sensor. 
Location (sensors, 
room operator units) 
Mounting over a 
conduit box