USB TO RS485 User Guide

Introduction

This is an industrial USB to RS485 converter with original FT232RL inside. It features embedded protection circuits such as lightning-proof, resettable fuse, ESD protection, and TVS diode, etc. It's pretty small in size.

Features

• USB to RS485 communication
• Adopt original FT232RL, fast communicating, stable and reliable, better compatibility
• Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightning-proof & anti-electrostatic
• Onboard self-recovery fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock resistance
• 3 LEDs for indicating the power and transceiver status

Specification

• Product type: industrial converter
• Baudrate: 300-921600bps
• Host port: USB
• Device port: RS485
• USB:
  • Operating voltage: 5V
  • Connector: USB-A
  • Protection: 200mA self-recovery fuse, ESD protection
  • Transmission distance: about 5m
• RS485:
  • Connector: screw terminal
  • Pins: A+, B-, GND
  • Direction control: hardware automatic control
  • Protection: 600W lightning-proof and surge-suppress, 15KV ESD protection (onboard 120R balancing resistor)
  • Transmission distance: about 1200m (low rate)
  • Transmission mode: point-to-multipoints (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more)
• LED indicators:
  • PWR: red power indicator, light up when there is USB connection and voltage is detected
  • TXD: red TX indicator, light up when the USB port sends data
  • RXD: red RX indicator, light up when the device ports send data back
• Operating environment:
  • Temperature: -15℃ ~ 70℃
  • Humidity: 5%RH ~ 95%RH
• Operating system: Mac, Linux, Android, WinCE, Windows 10 / 8.1 / 8 / 7 / XP

User guide

Driver installation

• Connect the module to host PC, check Device Manager, if the device is listed with the yellow exclamation mark, it means that the driver was not installed.

• Download the driver form #Resources, unzip, and install it.
• After installing, you can find that the mark disappeared and a COM device is listed

Testing

RS485

• You should prepare two RS485 device
• Connect A+ to A+, B- to B-, and connect them to host PC.

Run SSCOM software to test.

• Expected result

Resources

• Driver
  
• SSCOM software
  
• FT232R datasheet
  
• SP481E_SP485E SP485 datasheet
  

To：

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