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I.  Product Introduction

YT-3712 is an RS-232 signal extender that can extend the communication distance between two devices communicating through RS-232 ports to a maximum of 1.2 kilometers. Due to the use of twisted pair balanced transmission, the communication distance has been greatly extended. YT-3712 products have been widely used in point-to-point RS-232 communication, multi-user terminal and host connection, RS-232 remote control system, Stored program control billing terminal, satellite receiver.

II. Product Features
1. Amplify and extend RS-232 signal with a transmission distance of 1200 meters
2. Can achieve RS-232 three wire extension (2 pins, 3 pins, 5 pins)
3. Adopting data flow automatic control technology to automatically identify and control the direction of data transmission
4. Adopting external power supply, with strong driving ability and high working stability
5. RS485/422 terminal has a lightning protection/electrostatic discharge capacity of 600W per line
III. Product List
1. Two YT-3712 long line transceivers
2. Two DB9 wiring terminals
3. Two 12V/500mA DC power supplies
4. 2 public to female serial port cables
5. 1 instruction manual

System parameters
Interface: Compliant with EIA RS-232 standard
RS-232 signals: TXD, RXD, GND
Working mode: Supports asynchronous and synchronous transmission, point-to-point
Baud: 300 ～ 57.6Kbps, automatic detection of serial port signal rate
Direction control: automatic discrimination and control of data transmission direction
Relay distance: 1200 meters
Lightning protection: RS-485/422 output provides 1200W lightning protection
Static electricity protection: 15KV static electricity protection
Work environment
Working temperature: -40 ℃ to+85 ℃
Humidity: Relative humidity 5% to 95%
Working power supply
Input power supply: DC 12V/500mA
Power consumption: Static power consumption within 50mA, average dynamic power consumption within 100mA
Mechanical structure
long × wide × Height: 113mm × 55mm × 25mm
Shell: aluminum alloy
Color: Silver
Weight: 120g