The dormakaba EM500A 24V DC electromagnetic door holder is designed for use with overhead door closers and floor springs, providing secure and reliable hold-open functionality for fire and smoke control doors.
To prevent twisting forces on the door leaf, it is recommended that the door retainer is installed on the same horizontal plane as the closing device (or as close as possible). Incorrect positioning may cause the door to twist, potentially affecting its ability to close properly in an emergency.
Electromagnets for Hold-Open Systems
In many countries, regulations permit fire and smoke doors to be held open for controlled periods using electromagnetic devices. In the event of a fire, these units are de-energised, automatically releasing the door to allow safe closing.
Benefits for the Installer / Fabricator
- Quick and easy installation
- Comprehensive range of accessories for varied applications
Benefits for the Architect / Specifier
- Consistent, uniform appearance across models
- Modular system for flexible application
Benefits for the User
- Discreet, unobtrusive design
- Concealed cable routing
Key Features
- 24V DC operating voltage
- 400N holding force
- Designed and fully compliant with EN115
- CE marked
- UKCA marked