Technical data 
  6.1 Technical specifications W774/W734 RJ-45 
SCALANCE W774-1/W734-1 
Operating Instructions, 09/2015, C79000-G8976-C325-06 
41 
Mean time between failure (MTBF) 
at 40 °C ambient temperature 
*
)
 The PoE class depends on the hardware version of the device. Devices with a hardware 
version ≥ 3 have PoE class 2. Devices with a lower hardware version have PoE class 3.