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UT-2201 RS232/RS485 Converter
The UT-2201 is an RS232 to RS485 converter that supports two communication modes: point-to-point and multi-point, both in half-duplex. It requires a matching resistor to prevent signal reflection when operating in half-duplex mode. The converter complies with RS-232C and RS-485 standards, supporting data rates up to 115.2KBPS and transmission distances of up to 1200 meters. It connects up to 32 devices and operates without the need for an external power supply. Compatible with various communication software, it is a plug-and-play solution.
The UT-2201 is an RS232 to RS485 half-duplex converter supporting point-to-point and point-to-multipoint communication. Powered directly via the serial port (no external power required), it features plug-and-play operation. With built-in anti-reflection design, it requires a 120Ω terminal resistor for signal integrity. Supports up to 1200m transmission distance and 32 connected devices, compatible with major OS and communication software.
Technical Specifications
Interface Standard RS-232C (DB9 Female), RS-485 (DB9 Male), EIA/TIA compliant
Working Mode Asynchronous Half-Duplex (RS-485)
Transmission Media Twisted-Pair or Shielded Twisted-Pair (UTP/STP)
Baud Rate 300 bps ~ 115.2 Kbps
Transmission Distance RS-485 End: 1200m, RS-232 End: 5m
Terminal Resistor Requires 120Ω 1/4W resistor (prevents signal reflection)
Max Devices Up to 32 devices
Power Supply Serial port charge pump technology (TXD/RXD/GND), no external power required
Flow Control Auto send/receive, no external RTS signal required
Dimensions 63mm × 33mm × 17mm
Operating Environment Temp: -25℃ ~ +70℃, Humidity: 5% ~ 95% RH
OS Compatibility DOS/Win95/98/2000/XP/NT/Linux
Material/Color Plastic shell / As shown in image
English：1 × RS232 to RS485 Converter
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The UT-2201 is an RS232 to RS485 converter that supports two communication modes: point-to-point and multi-point, both in half-duplex. It requires a matching resistor to prevent signal reflection when operating in half-duplex mode. The converter complies with RS-232C and RS-485 standards, supporting data rates up to 115.2KBPS and transmission distances of up to 1200 meters. It connects up to 32 devices and operates without the need for an external power supply. Compatible with various communication software, it is a plug-and-play solution.