TTL to RS485 UART Conversion Module – Auto Flow Control 3.3V 5V

$7.10 $8.14

TTL to RS485 / RS485 to Serial UART Level Conversion Module

Bridge the gap between TTL serial UART and RS485 protocols with this compact, reliable level conversion module. Featuring fully automatic flow control, this board handles bidirectional signal conversion seamlessly — no manual direction-switching needed. Compatible with both 3.3V and 5V systems, it's an ideal solution for microcontrollers, single-board computers, industrial communication systems, and embedded development projects.

Made in Mainland China.

Key Features

Bidirectional Conversion: Supports TTL → RS485 and RS485 → TTL (UART) signal conversion in a single module
Automatic Flow Control: Eliminates the need for manual RTS/DE signal management — direction switching is handled automatically
Dual Voltage Support: Compatible with both 3.3V and 5V power supplies for maximum flexibility
Wide Operating Temperature: Reliable performance from -40°C to +85°C, suitable for demanding environments
SMD Package: Compact surface-mount design for easy integration into circuits and PCB layouts
No Hazardous Chemicals: Free from high-concern chemical substances
Plug-and-Play Ready: Simple wiring with clearly labeled pins for fast setup

Specifications

Supply Voltage: 3.3V / 5V
Operating Temperature: -40°C to +85°C
Package Type: SMD
Flow Control: Automatic
Condition: Brand New
Quantity: 1 module per order
Origin: Made in Mainland China

Common Applications

Arduino, Raspberry Pi, and other microcontroller UART interfaces
Industrial RS485 bus communication systems
PLC and automation equipment serial interfacing
Computer and embedded serial port conversion
DIY electronics and prototyping projects

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Frequently Asked Questions

Q: What is the TTL to RS485 conversion module used for?

A: This TTL to RS485 conversion module is used to interface microcontrollers, Arduino boards, Raspberry Pi, or any UART serial device with RS485-based industrial equipment, sensors, or communication buses. It translates voltage levels between TTL logic (3.3V or 5V) and the differential RS485 standard, enabling reliable long-distance and noise-resistant serial communication.

Q: Does this module require manual flow control or direction switching?

A: No — this module features fully automatic flow control. It intelligently detects the direction of data transmission and switches the RS485 transceiver accordingly, so you do not need to manually toggle any control pins (such as DE or RTS). This makes it much simpler to integrate with standard UART interfaces.

Q: Is this module compatible with both 3.3V and 5V systems?

A: Yes. The module supports both 3.3V and 5V supply voltages, making it compatible with a wide range of microcontrollers and development boards. Always check your specific device's voltage requirements before connecting to ensure proper operation.