... smoke detector, emergency switch, etc. Smoke ventilation system Smoke & Fire Control Linked System is an intelligent control center (CPU),that ... automatically and to open ventilation exhaustdevice.Smoke & Fire Control Linked System can link daily ventilation switch, emergency button, ... output voltage type: DC24V/20A6, Install mode: the wall-mounted7, Basic dimensions: 200mm 400mm x 300 mmThe complete ...