Request : Are there special requirements for ET 200S when
   mounted on sheet metal plates?
   May standard mounting plates and DIN rails (mounting rails) be used? Are 
   yellow passivated sheet metal plates permitted?

Suggestion : There is no special requirements regarding surface or 
   material of mounting plates and DIN rails. Our factory does not use yellow 
   passivated steel plates anymore due to hazardous substances beeing emitted 
   during passivation process. 
   The only requirement for the mounting rail is a fixing screw at every 200 mm 
   for stability reasons.