USB to RS485
FTDI Interface Converter

ModBus adapter

 

This opto/galvanic isolated auto transmit converter, features bi-directional serial conversion from USB to RS485 in 2 wire half duplex mode using Virtual Serial COM Port.

The USB-RS485 is a complete, self powered, USB to RS485 Interface working at any baud rate up to 250k baud. It features automatic bus turn-around - any time your not transmitting the module is listening.

Uses the SN75176 transceiver, so you can have up to 32 devices on the bus.

The Modbus industrial protocol was developed in 1979 to make communication possible between automation devices.

 

Manufacturer:
KMtronic LTD

Features:
- Self-powered from USB
- POWER, TX and RX LED indicators
- Automatic Bus Turnaround

Complete including:
One USB to RS485 module

USB to serial interface:
FTDI FT232RL Chip

Supply:
Fully powered from USB

Drivers are available to work with the following operating systems:
Windows ALL SYSTEMS,
Linux,
Mac OS X, Mac OS 9, Mac OS 8,
Windows CE.NET (Version 4.2 and greater)
Raspberry PI
Arduino ADK

Tested with Eastron SDM230 Modbus Smart Meter with Modbus Protocol:

Modbus RTU

SDM230 Modbus Smart Meter provides a RS485 port for remote communication. Modbus RTU is the protocol applied. For Modbus RTU, the following RS485 communication parameters can be configured from the Set-up menu.
Baud rate: 1200, 2400, 4800, 9600
Parity: NONE/EVEN/ODD
Stop bits:1 or 2
Modbus Address: 1 to 247