... % non-condensingCommunication InterfaceRS485/RS232Operation life≥5 million times Product features1 , Self-test and alarm system function, user-friendly maintenance and use ... the master board built-in button, the device can be set up, with all kinds of IC, ID cards, Barcode, magnetic cards2 ... , at any time to control the number 4 ,Can be set to normally open, normally closed mode of operation to meet ...