DT-9000 Passive RS232 to RS485 converter Feature:1,Compatible with RS232,RS485 TIA/EIA standard.2,Automatically send/receive data ,without external traffic control signals.3,Communication rate:300~38400bps4,Communication distance: 1.2Km(9600bps),can connect 32pcs RS232 or RS485 device.5,Power and two color data traffic indicator light, can detect the fault point.6, Work way: Asynchronous