UTEK UT-2211 RS232 To RS485 Passive Adapter Switch 232 to 485 Port-powered 600w Surging Protetion Communication Distance 1.2km

Interface characteristics: The interface is compatible with EIA/TIA's RS-232C and RS-485 standards.
Electrical interface: RS-232 end DB9 hole type connector, RS-485 end terminal.
Working mode: asynchronous half-duplex differential transmission
Transmission Medium: twisted pair or shielded wire
Transmission rate: 300BPS- 115.2KBPS
Dimensions: 58mm×33mm× 19.5 mm
Operating environment: -25 to 70, relative humidity 5% to 95%
Transmission distance: 1, 200 Meter (RS-485 terminal) 5 meters (RS-232 terminal) In order to facilitate remote data communication between computers with different standard serial interfaces, external devices or intelligent instruments, standard serial interface conversion must be carried out. The converter is compatible with RS-232, RS-485 standard, which can convert RS-232 signals to single end balance RS-485 signal converter, the communication distance of RS-232 can be extended to 1.2 km, no external power supply adopts the unique "RS-232 charge pump drive, do not need to rely on the initialization of RS-232 serial port can be obtained with internal power, zero delay send and receive automatic conversion, automatic control and data flow direction I/O circuit is unique, without any handshake signals (such as RTS, DTR, etc. ) so as to ensure the RS-232 prepared in half duplex mode under the program running in RS-485 mode without change, to ensure the suitability of the existing software and hardware interface converter, transmission rate 300- 115.2K bps. can be used in between the main control computer main control and MCU peripherals or a point-to-point, point to multipoint remote multi computer communication network, to achieve multi machine.

A communication is widely used in industrial automation control system, smart card, access control system, parking lot system, self-service bank system, bus charging system, canteen canteen system, employee attendance management system, highway toll station system etc..