User's Manual

Fix:
12..27ms
(-25...65°C)
Variable:
0..9.5 ms
(16 slots)
Fix:
12..27ms
(-25...65°C)
t
Figure 17: STM 250 radio timing
2.3.4 Reliable radio transmission within systems operating many sensors
The very short telegrams of EnOcean transmitters enable the operating of a large number of
senders within the same radio cell; the error rate caused by telegram collisions remains
extremely low. Statistically viewed, the transmission reliability is still greater than 99.99% in
the case of 100 radio sensors that transmit once every minute. This means that even large
office buildings and also huge industrial facilities can be equipped with a large number of
sensors of this kind of radio technology.
EnOcean
radio switch
Typical
radio switch
Figure 18: Transmission reliability caused by radio data collision
for EnOcean light switch transmitter
©EnOcean GmbH, A. Anders Page 16 of 24 STM 250 User Manual V1.3