Fire door opening and closing devices which, fire now in this piece of the requirements of more stringent, and fire fighting linkage, who is more knowledge of this piece of knowledge, seek guidance
Intelligent linkage open, can not linkage reset, can only go to the scene manually reset.
The current application of the fire door opening and closing device is a fire door electromagnetic release, through the input / output module to achieve linkage with the fire, the trouble is once activated, you need to manually reset.
