Passive converter RS-232 to RS-485. RS232 DB9 and RS485 terminal

1,Compatible with RS232,RS485 TIA/EIA standard.
2,Automatically send/receive data ,without external traffic control signals.
3,Communication rate:300~38400bps
4,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 half-duplex(RS485),no need jumper wire settings.
7,Optical and electrical isolated(isolated voltage 2.5KVrms/500VDC insulation),RS485 provide 600W per line lighting protection and prevent common ground interference.
8,Electrical interface: RS232 interface connect DB9 hole type connector,RS485 interface 4 terminals binding post transmission medium(twisted pair or shielded cable)
9, Use environment:-40℃~85℃;Relative humidity 5%~95%(Non-condensing)