Autom. electric strike controls

Unrestricted public access despite locked door. For premises such as doctor and lawyer practices. During visiting hours, the automatic control system operates door strike release. The visitor rings the door bell and activates the automatic system in the door strike control device if the system is engaged. This releases the door for 1 to 10 seconds after the preset delay of 1 to 20 seconds. The visitor can enter during this time. The closed door is then locked again. When system is switched off, normal door strike mode. The automatic door strike control can be installed in all door strike systems with effeff electric strikes (single models).