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I. Product Overview
UT-881 is a universal USB2.0 to RS-232 converter that uses FDTI chips internally and is compatible with USB2.0 and RS-232 standards without the need for external power. It can convert single ended USB signals into RS-232 signals. The converter has zero delay automatic transmission and conversion, and a unique I/O circuit that automatically controls the direction of data flow, plug and play Ensure suitability for all existing communication software and interface hardware. The UT-881 interface converter can achieve a point-to-point data communication rate of 300-460800bps, with a power indicator light and data flow indicator light to indicate fault conditions. Supported communication methods include USB2.0 to RS-232 conversion.

The YT-881 USB2.0 to RS232 converter can establish a stable connection between the RS232 serial port and the USB interface. The USB interface has the characteristics of plug and play and hot swapping, which can provide a very easy to use interface environment for peripheral devices configured with serial ports. It is widely used in point-to-point communication, industrial automation control system, all-in-one card, Door security, parking lot system, industrial distribution system, various remote control measurement systems, POS cash registers, banks, insurance, securities, all-in-one card system, traffic toll collection system, various PLCs, data Electricity meter, etc.

II. Product Features
1. Complies with USBV2.0, 1.1, 1.0 EIA RS-232 standards
2. USB signal: VCC, DATA -, DATA+, GND
3. RS-232 signal: RXD TXD GND DCD DTR DSR RTS CTS RI
4. Working mode: asynchronous, peer-to-peer
5. Direction control: Adopting data flow automatic control technology to automatically identify and control the direction of data transmission
6. Baud: 300-460800bps, automatic detection of serial port signal rate
7. Load capacity: point-to-point communication method
8. Transmission distance: RS-232 end 5 meters, USB port no more than 5 meters
9. Interface protection: ± 15KV electrostatic protection
10. Interface form: USB A-type interface male, DB9 male connector connection
11. Signal indication: 2 signal indicator lights send (TXD) receive (RXD) 1 power indicator light (POWER)
12. Transmission medium: twisted pair or shielded wire
13. External dimensions: 1500mmX36mmX16mm (length x width x height)
14. Operating environment: -25 ℃ to 70 ℃, relative humidity of 5% to 95%
15. Support Win11/Win10/Win2000/2003/2008/2012/XP/Vista/7/8/8.1/CE/Mac/Linux, etc
III. Product List
1. 1 YT-881 USB2.0 to RS232 converter
2. 1 drive disc
3. 1 product manual

System parameters
Interface: Compliant with USB2.0 and RS232 standards
RS-232 signal: 9-wire full signal
Working mode: supports asynchronous transmission and synchronous transmission
Baud: 300 ～ 115.2Kbps, automatic detection of serial port signal rate
Direction control: automatic discrimination and control of data transmission direction
USB cable length: 1.5 meters
Anti static protection:+/-15KV ESD anti static protection
Indicator light: Equipped with power and data flow indicators, which can be used to determine the type of fault.
Static electricity protection: 15KV static electricity protection
Work environment
Working temperature: -20 ℃ to+85 ℃
Humidity: Relative humidity 5% to 95%
Working power supply
Input power supply: Internal power supply through USB port, no need for external power supply
Power consumption: Static power consumption within 150mA
Mechanical structure
long × wide × Height: 45mmX30mmX20mm
Shell: semi transparent plastic shell
Color: Blue
Weight: 120g