1.Single door control and two way 2.RS485 Network Door Control 3.Readers can connected: ... to Controller100m (suggestion distance 80m)Max Distance between ControllersRS232: Communication Distance less than 13m, suggestion distance is 3m or less ... net coverage areaCollocationsPCB board, case, power, power line, serial port communication line, software, manual, certificate, key(2pcs), cartonAlarm for long ...