# USB to TTL RS485 converter module, serial, FT232RL, dual function

- Page: https://sigmanortec.ro/en/usb-to-ttl-rs485-converter-module-serial-ft232rl-dual-function
- Price: 15.69 RON
- Availability: In stock; 1-2 zile
- Reference: 9487 · EAN: 5946419470247
- Category: Mechatronics and IoT > Serial and CAN Converters
- Package (shipping data): 0.012 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

USB 2.0 to RS485 and TTL converter, ideal for quickly connecting PLCs, CNCs or cameras to PC. Based on FT232RL and SN75176 bidirectional transceiver, ensures stable multipoint communication up to 32 devices. Automatic direction control and speed 300-9216000 bps, compatible with Windows, Linux and Mac, 3-5V power supply with TVS protection.
This module performs bidirectional conversion between the USB interface and the RS485 serial protocol, intended for industrial automation, remote monitoring, and control applications.
The board integrates two dedicated circuits: FT232RL for USB-TTL conversion and MAX485 for differential TTL-RS485 conversion, ensuring stable and reliable communication over distances of up to 1200 meters.
The default TTL logic level is 5V. The RS485 terminal is a three-point screw connector (A+, B-, GND) for robust field line connection. The board includes 8.7V TVS diodes for RS485 line overvoltage protection, an LED indicator for RX activity, and direct power supply via USB without an external source.
The board supports bidirectional half-duplex communication. Its compact dimensions and integrated USB Type B connector directly on the board eliminate the need for additional cables.
The module is compatible with Arduino, ESP32, STM32, Raspberry Pi, and any system with an available USB port, operating on Windows, Linux, and macOS through the standard FTDI VCP driver.
Specifications:
Power supply voltage: 5VDC via USB
TTL logic level: 5V (3.3V compatible via external level shifter)
Current consumption: 35mA
Standards: USB 2.0, backward compatible and RS485 standard
Direction control: automatic detection of data communication direction by analyzing transmitted data
Speed: Baud rate 300 - 9216000bps, automatic detection
Load capacity: supports point-to-multipoint, up to 32 devices connected via RS485
Protection: TVS tube and USB self-recovery, 8.7V TVS diodes
Supported operating systems: Windows 98 / ME / 2000 / XP / WIN7 / Vista / Linux / Mac
USB connector: Type B (B-Type)
Communication driver: FT232RL
Integrated Bidirectional Transceiver: MAX485
Dimensions mm: 78 x 12 x 18mm
Pinout:
Pin / Label
Interface
Description
A+
RS485+
Positive differential line
B-
RS485-
Negative differential line
GND (TB)
GND
Ground / RS485 line shielding
Usage:
Install the FTDI VCP driver from ftdichip.com for your operating system.
Connect the module to the USB port of your computer or power source.
Check for recognition of the virtual serial port in Device Manager (Windows: COMx) or terminal (Linux: /dev/ttyUSBx).
If using the module directly with a PC, leave the jumpers installed and connect the RS485 line to the green screw terminal.
Connect the A+ wire to the corresponding terminal on the green connector and the B- wire to the adjacent terminal.
Ensure all devices on the RS485 bus share the same GND to avoid potential differences.
Set the desired baud rate in software, 8 data bits, 1 stop bit, no parity.
Test communication with the example code below.