... . Don't like the normal door operator ,you need to adjust the speed and buffer speed to a value ,then the door can work ... if power fail or fire3. If fire ,the door will out-of-lock for people to escape4. BEA photocell to prevent people from ... GR 63 * 55, 60V, SG80K, WL2, i=10:1, RE20S or normal motorMicrocontroller32bit 30Mhz ST MCU, CANbus techinequesAdjustable parameterSpeed,Opening Width ...