Device designs 
SM/FEX300/FEX500/FM/CSA-EN  FEX300, FEX500  EN - 15 
 
Fig. 6: External transmitter, model FET325 / FET525 for Zone 2 (single-compartment housing) 
„A“ Name plate 
1  Model number (for more detailed information about 
the technical design, refer to the data sheet or the 
order confirmation) 
2 Order no. 
3 Supply voltage 
4 T
amb
 = maximum permissible ambient temperature  
5 Communications protocol of transmitter  
6 CE mark 
7  Client-specific TAG number (if specified) 
8  Protection type according to EN 60529 
9 Software version 
„B“ Ex mark according to FM and cFM (example)  „C“ Safety mark 
 
   
G01334
1
2
3
4
5
6
7
8
9
„A“
„B“
„C“
„A“
„B“
„C“