MD11001 RS485 to USB Isolated Converter (EN)

Description

Industrial Isolated RS485 to USB Converter
The MODIG RS485-USB ISO is a bidirectional bus converter bridging RS485 networks with a USB interface. The USB side features a high-performance, USB 2.0-compliant FTDI controller paired with a modern USB-C connector. The RS485 side utilizes an industrial transceiver capable of driving a bus network with up to 64 devices. The converter is equipped with advanced noise suppression, surge protection, and robust galvanic isolation circuitry. Additionally, it features an integrated RS485 bus terminator in the form of a switchable 120 Ω resistor.

Key Features and Specifications

Industrial-grade RS485 to USB converter
High-performance FTDI FT230 USB controller, fully compatible with USB 2.0 standard
Modern USB-C connector interface
Virtual COM Port (VCP) drivers available for Windows, Linux, and macOS
Industrial STMicroelectronics ST485BDR RS485 transceiver
Transmission mode: Half-duplex communication
Baud rate: Maximum speed up to 1 Mbps (1,000,000 bps)
Network capacity: Supports up to 64 nodes on the RS485 bus
LED indicators: Diagnostic LEDs for active data transmission monitoring
Line termination: Integrated 120 Ω termination resistor (configurable)
Advanced features: Supports hardware ECHO function (simultaneous transmission and loopback data validation)
Isolation protection: Robust 1 kV galvanic isolation between USB and RS485 circuits
Circuit protection: Integrated surge and overvoltage protection on both RS485 and USB lines
RS485 connector: Phoenix Contact MC 3.81 mm screw terminal block (Pins: A, B, GND)
Power supply: 5 VDC via USB-C port; Maximum current consumption: 100 mA
Operating temperature range: Extreme industrial range from -40°C to +70°C
Dimensions: 80 x 47 x 24 mm

Kit Contents

Product Code	Description
MODIG Industrial RS485-USB Converter ISO	Fully assembled, programmed, and tested converter module
USB Cable	USB connectivity cable with USB-A to USB-C connectors

Application Example for the MODIG USB-RS485 ISO Converter

Interface Connectors and Pinout Description

USB-C Connector

Interface Element	Function
USB-C Connector	Supplies 5 VDC power to the host side of the converter Handles bidirectional data transmission to and from the RS485 bus Features the FTDI FT230 USB controller chip (USB 2.0 compliant) Emulates a standard serial COM port on the host OS

Status LED Indicators

LED Indicator	Function
PWR	Indicates that the converter is correctly powered
TX	Flashes when data is being transmitted to the RS485 bus
RX	Flashes when data is being received from the RS485 bus

RS485 Connector

Interface Element	Function
RS485 Bus Terminal	Industrial Phoenix Contact MC 3.81 mm screw terminal block Exposed RS485 differential signals: A+, B- and Signal Ground: ⏚

Configuration DIP Switch

Interface Element	Function
Configuration DIP Switch	Switch Section No. 1: In the "ON" position, connects the 120 Ω termination resistor across the RS485 bus lines Switch Section No. 2: In the "ON" position, enables the hardware ECHO function, allowing data transmitted from the converter to be simultaneously read back for loopback validation

External Links

FTDI VCP Drivers Download