RS23 To RS485 , Rs485 To RS232...
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RS232 to RS485 Data Communication Adapter
Bi-direction RS232-485 converter is mainly used for telecommunication between end to end
or end to ends of main electronic controllers. The converter works between the main
controller and sub machine station to complete System Industrial automatic control, universal
card system, system access control, parking system, banking system self-served, bus
system tickets, restaurant menu system , personal care system and road toll system, etc.
RS232-485 converter can transfer the TXD and RXD signals of RS-232 serial port to parallel
half duplex RS-485 signals without external power source because it can collect electricity
supply Pin 3 RS-232 port and also , after the request to send RTS pin 7, the
Ready DTR pin 4 help supply the converter. This process control presented makes the
easy application of the hardware configuration and software.
Serial port: at the same time compatible with RS-232C, RS-485 serial EIA / TIA.
Electrical interface DB9 RS-232 end, DB9 pin connector of RS-485 port end
Function method: Half duplex asynchronous
Transmission media: Regular wire, UTP or shielded cable
Transmission speed: 300 ~ 115200 baud / S
Transmission distance: 5 meters (RS-232 side) and 1200 meters (RS-485) side.
Telecommunications protocol: Transparent
Working environment: -10 degrees Celsius to 85 degrees Celsius, relative humidity: 5% to 95%
Signals: RS-232 232: TXD, RXD, RTS, CTS, DTR, DSR, DCD, GND; RS-485: Data +, Data-, GND
Wiring and signals:
End RS232 (DB9female) RS485 (DB9 male male)
The converter connects the RS232 port with DB9 female to terminal RS485 port with DB9 male terminal with the pad wiring.
There are 2 types of power supply:
A. directly via RS232 pin 3 more PIN7 (RTS) pin 4 (DTR) as a supplement to the offer;
B. Through RS485 external wiring pad.
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