EnOcean GmbH PTM200C User Manual

 

For the transmission of the telemetric signals, EnOcean has defined a new dynamic radio data 

telegram that is adapted to the individual application. It is optimized to the essential features 

of energy autarkic radio sensors: 

•  Minimal energy demand 
•  Possibility of operating hundred of senders within the same radio cell 
•  Maximum transmission reliability 
•  Wide transmission range 
•  Easy extensibility 
•  Suitable for uni- and bi-directional communication 
•  Flexibility for adaptation of different data structures and data quantities 
•  Data encryption option 

 
2.3.1 Frequency range 
The EnOcean PTM200C operates at 315.0 MHz.  
 
2.3.2 Modulation process 
As modulation process, EnOcean uses incoherent amplitude modulation (ASK). Digital 

amplitude modulation enables the implementation of very efficient energy-saving transmitters 

because only the “1”-bits are transferred. At the same interference signal level, the 

transmission security of the alternative FSK method is identical to that of the ASK method . 
 
2.3.3 Transmission timing 
The transmission timing of the radio device PTM 200C has been developed to avoid possible 

collisions with data packages of other EnOcean transmitters as well as disturbances from the 

environment. 
With each transmission cycle, at least three identical subtelegrams are transmitted. The 

transmission of a subtelegram lasts approximately 0.7 ms. To optimize data security, each 

telegram is repeated twice within about 20 ms, whereas the delay between the second and the 

third transmission burst is effected at random. If some residual energy is available after 

transmission of three subtelegrams, up to 2 further subtelegrams are sent. 
 
 

Nominal values: 

0...7,5ms 

at random 

5 ms 

10 ms 

t 

 
 
 
 
 

 
©EnOcean GmbH, W. Heller 

 

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 PTM 200C User Manual V1.01