DORMA EM Series Hold-Open Magnets

Electromagnets for hold-open systems

DORMA’s new range of EM hold-open magnets provides the perfect complement to a technically and aesthetically advanced range of fire and smoke check door products. These new market-orientated developments are characterized by their ease of fixing and functional elegance. And thanks to comprehensive quality assurance, they also offer maximum reliability and service life.

Electro-magnets for hold-open systems

The statutory regulations which apply in many countries allow fire and smoke check doors to be held open for a limited period of time by electro-magnetic hold-open devices which, in the event of a fire, are de-energized to release the door so as to enable automatic closing.

Manual release

It must also be possible to manually release any hold-open device. According to the applicable guidelines for hold-open systems, a manual release pushbutton is necessary when employing electromagnets in such applications. The pushbutton employed must be red, carry the wording “Close door”, be located in the immediate vicinity of the door, and must not be hidden when the door is in its hold-open position.

Benefits for the trade/distributor
  • Cost-effective modular system offering the advantages of maximum flexibility with minimal stocking levels
  • A further component in the DORMA range for single-source supply
Benefits for the installer/fabricator
  • Quick and easy to fix
  • Sophisticated accessories suitable for a wide range of applications
Benefits for the architect/specifier
  • Uniform appearance common to all models
  • Modular system for application flexibility
Benefits for the user
  • Unobtrusive
  • Concealed cable run
  • Optimum holding force with minimum power consumption

Technical Brochure [1]

Product Description Format/Size Date Language  

EM Series

Technical leaflet

1.15 MB
03.2012 EN download

Instructions/Manuals [5]

Product Description Format/Size Date Language  


EM HT Mounting Instruction

415.79 KB
10.2012 INT download


EM Mounting Instruction

752.60 KB
03.2013 INT download


EM Mounting Instructions Floor Angle Bracket

615.46 KB
11.2011 INT download


EM Mounting Instruction Adapter Frame

499.88 KB
11.2011 INT download


EM 500H Mounting Instruction

460.40 KB
03.2011 INT download