BF-831 is RFID identification based controller for proximity card EM 125 kHz. It is always used to manage entrance security, work place time attendance, overtime working verification and any other situation/ event for the authorized personnel's presence. It can either work standalone without connecting to the PC or be integrated with PC thru RS-232/485 or RJ-45 port. Also, BF-831 can be linked with BF-870 as a reader in Multi door control solution.
RS-232 / PS2: