Product description ■ Fully compatible with USB (Universal Serial Bus) VER: 1.1 ■ Support for RS-232 interface ■ The standard DB9 serial port ■ With USB Direct power supply, do not need additional power supply ■ ±15KV ESD protection ■ The ASIC chip can support USB port to the serial port communication. ■ Transmission distance: 5m ■ Working environment: -25℃ to 70℃, relative humidity 5% to 95%. ■ Windows98/2000/WinXP/ Vista/Linux supported.

The USB to RS485 module is a cost-effective way to convert RS485 industrial buses to a USB interface. When connected to a PC USB port the USB to RS485 module is automatically detected and is installed as a native COM port which is compatible with any existing serial communication application. Multiple modules can be installed when using USB hubs thus allowing a hassle-free configuration of a multi serial system. Features

• Reliable RS485 link
• Automatic Switching between Transmit/Receive mode of RS485.
• Twisted pair cable can work upto 1.2 Km distance.
• Ground Output for wire shielding.
• USB Powered
• USB Port Plugabble type
• Designed for industrial environment

Specifications

• Any baud rate from 1200 bps to 115 kbps
• Current: 100mA current at 5V DC taken from PC’s USB Port
• Modes: RS-485 Half Duplex (2-wire)
• Built in terminal resistor of 120R Ohm
• Length of twisted pair cable maximum can be 1.2 Km (Kilometer) Maximum
• Cable type for optimal range: Two core, Twisted Pair Shielded type, D and D- should be twisted with each other to get optimal range

The cable is easiest way ever to connect to your microcontroller/Raspberry Pi/WiFi router serial console port. Inside the big USB plug is a USB<->Serial conversion chip and at the end of the 36" cable are four wire - red power, black ground, white RX into USB port, and green TX out of the USB port. The power pin provides the 5V @ 500mA direct from the USB port and the RX/TX pins are 3.3V level for interfacing with the most common 3.3V logic level chip-sets.