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INT201

Isolated USB Transceiver Module

The INT201 is a fully isolated USB↔Serial transceiver for USB-UART, USB-RS485, and USB-RS232 data conversion. A 1 kV isolation barrier protects the host PC from the serial side, while a simple DIP switch selects the active channel, making it a safe, plug-and-play bridge between a computer and LiBat devices.

INT201

Overview

The INT201 is a compact, fully isolated bridge between a USB host and serial devices. A single board converts USB to UART, RS485, or RS232, selected with an on-board DIP switch, while a 1 kV isolation barrier keeps the PC electrically separated from the serial side to avoid ground loops and protect against transients. It enumerates as a plug-and-play USB device with a universal PC driver, exposes ESD-protected outputs, and provides isolated 5V and ground for the serial side. Status LEDs confirm any UART activity, and a small, cuttable PCB lets the board be trimmed to fit tight installations.

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The INT201 is a fully isolated USB↔Serial transceiver designed for USB-UART, USB-RS485, and USB-RS232 data converting purposes. The serial mode is selected with an on-board DIP switch — RS232, RS485, or UART (TTL, 3.3–5V) — and the board exposes RS485 A/B lines with a termination jumper, RS232 transmit/receive, UART transmit/receive, and isolated 5V and ground outputs on a single connector. A 1 kV isolation barrier separates the USB host from the serial side, and the outputs are ESD protected for dependable field use. Connection is over a USB-C (USB 2.0) port, and the INT201 enumerates as a plug-and-play USB device using a universal PC driver — no special driver is needed, though the supplied driver can be installed if a computer does not recognize the board. Two status LEDs (through-hole and surface-mount) indicate activity. The board measures 59.6 × 50.8 mm and includes a cutout line so it can be trimmed down to 25 × 50.8 mm for space-constrained designs; only the marked mounting holes should be used, with plastic nuts and bolts recommended.

Highlighted Features

  1. 01

    Fully Compatible with the LiMon PC Tool

    Works out of the box with the LiMon PC Tool, providing the USB-to-serial bridge a Windows PC needs to configure, monitor, and diagnose LiBat BMS devices.

    LiMon PC Tool
  2. 02

    Fully Isolated USB↔Serial Transceiver

    Converts USB to UART, RS485, or RS232, with a 1 kV isolation barrier separating the host PC from the serial side.

  3. 03

    Three Selectable Serial Modes

    RS232, RS485, and UART (TTL, 3.3–5V) modes are selected with an on-board DIP switch.

  4. 04

    1 kV Isolation Barrier

    Galvanic isolation protects the host computer from ground loops and transients on the serial side.

  5. 05

    Plug & Play, No Special Driver

    Enumerates as a plug-and-play USB 2.0 device with a universal PC driver — no special driver is needed.

  6. 06

    ESD Protected Outputs

    Serial outputs are ESD protected for dependable operation in field and industrial environments.

  7. 07

    RS485 Termination Jumper

    An on-board jumper enables RS485 line termination when the INT201 sits at the end of the bus.

  8. 08

    Status LEDs

    Through-hole and surface-mount status LEDs indicate any UART activity at a glance.

  9. 09

    Compact, Cuttable PCB

    A 59.6 × 50.8 mm board with a cutout line that can be trimmed to 25 × 50.8 mm for tight installations.