Safety first: In the fire or power-off,the door can be free to promote and ensure unimpeded; Various Interfaces:1/O,RS232/485,CAN interfaces,which it is convenient to control interface. Two working modes:NC and NO,which is easy to deal with peak and normal use Multiple control modes:There are unidirectional,bidirectional,free passage and authorization passage to meet fully the usersneeds,which consist of nine control modes;
