Free shipping RS232 TO RS485 Converter,Commercial Version,no power need,STM485C UT-201

1. Interface feature: RS-232C, RS-485 standard interface compatible with EIA TIA

2. Electric interface: RS-232 end DB9 hole connector RS-485 end DB9 needle connector with connection pole.

3. Working mode: asynchronism half-duplex (RS-485)

4. Transmission media: twisted -pair or STP

5. Transmission rate: 300-115.2KBPS

6. External discharge dimension: 63mm * 33mm * 17mm

7. Working circumstance: - 25 to 70 degree C, relative humidity 5%to95%     

8. Transmission distance: 1,200m(RS-485 end) 5m(RS-232 end)

9. Operating system: DOS/WIN95/WIN98/WIN2000/NI/XP/Linux and so on

10. Applies to all communication software, plug and pay

11. Max 32 pieces  face devices can connect

12. Power: Unique serial port charge pump driving technology, no need external power, real 3 wire communication (TXD, RXD, GND), no need initialize serial port

13. Auto send/receive data, without external flow control signal (RTS)

14. serial port rs232

UT-201 interface supports 2 communication modes as below:

1. Point-to-point 2 wires half-duplex

2. Point-to-multipoint 2 wires half-duplex

When converter works under half-duplex connection, it needs to install a matching resistance (data 120 ohm1/4W) for preventing signal reflection and interference.

UT-201 half-duplex communication connect between interface converter

Package include :

RS232 To RS485 Data Communication Adapter