... RS232/485,USB Host Introduction:SC503 is an access control devices produced by ZKSoftware, which is made with ... design and professional surface treatment. The device have lock control, alarm, exit button, door sensor. The wiegand-in ... ID card Capacity30000Transaction Capacity50000CommunicationTCP/IP, RS232/485, USB-HostAccess Control Interface for3rd party electric lock, door sensor, exit button, ...