Surface-mounted housing model A01, The solution for installation situations in which the installation of electric door openers is not possible due to technical difficulties or legal regulations. By installing it as an additional lock, the door is secured in the entry and exit directions. Particularly suitable for combination with effeff escape route and access control systems., The surface-mounted housing A01 integrates the escape door opener 331U to secure the escape route., Always order the matching door openers model 131® and 331U in DIN left (4) and in FaFix® version (FF)., Extensive installation material and drilling template are included in the scope of delivery., When using fail-safe door openers, the door is locked in the event of a power failure, and there is then no electrical opening option. A mechanical emergency release can be carried out on the installation side using suitable tools. We recommend operating the system with an emergency power supply when using fail-safe locks. When using fail-safe door openers, the door is unlocked in the event of a power failure.