access control , 4 RFID Reader wiegand26 Ports, SUPPORT 14 TTL INPUT SIGNAL , 8 RELAY OUTPU,RS232/485 interface , Can connect 4 RFID Reader , SUPPORT 8 TTL INPUT SIGNAL FOR SENSOR SUCH DOOR STATUS INPUT , 8 RELAY OUTPUT FOR DOOR CONTROL OR ALARM SpecificationsTech character:4 doors in/out with reader ,Interfaces: wiegand interfaceSingle card, password, dual card method optional to open doors and ...