Question :

• What is the the European standard EN 12209 ?

Answer:

• The European norm 12209 specifies requirements and test methods for durability, strength, security and function of mechanically operated locks and latches and their striking plates for use in doors and windows in a buildings.
  The locks used in fire proof doors need additional attributes to comply the EN 1634-1.
  

Related questions:

• Are the Opera products conform to the RoHs directives ?
• What is the CE Marking ?