DS-K260X series Access Controller V2.0.2_Build171107 

IMPORTANT! When upgrading DS-K260X series access controller from V1.1.1 to V2.0.2, the controller buzzer will keep sounding for approximately 5 minutes after restart, please do not power off and let it finish the upgrade process. If you reboot the device while buzzing, please do  initialization via the onboard jumper.

DS-K260X_Serial.bin - use if connection with the controller is via RS-485
DS-K260X_Serial.bin - use if connection with the controller is via LAN