Hikvision DS-K2708X Access Door Controller for 8 Doors 8 Wiegand & 16 RS485 Read
5-ch downlink RS-485 interface supports two applications: 1. When 4-ch RS-485 communication, the 5th RS-485 can be used as a redundant application; 2. Access Module: supports 8-ch RS-485 interface for card reader connecting.