MAX485 TTL to RS485 Converter Module for Arduino & MCU

MAX485 RS-485 TTL to RS485 Converter Module – Reliable Long-Distance Communication for Arduino & MCU

Upgrade your microcontroller projects with the MAX485 RS-485 TTL to RS485 Converter Module. Built around the trusted MAX485CSA chip, this compact module delivers stable, noise-resistant serial communication over distances up to 1,200 meters. Whether you're building industrial automation systems, sensor networks, or Arduino-based projects, this module makes wiring and integration effortless.

Made in Mainland China.

Key Features

• High Interference Resistance: Built-in interference suppression circuitry and differential transmission lines protect your data from external noise, ensuring clean and accurate signal conversion.
• Long-Distance Communication: Supports multi-node RS-485 communication with a maximum transmission distance of over 1,200 meters — ideal for large-scale deployments.
• Fast Data Transfer Rates: Handles high-speed data transmission to meet the demands of time-sensitive applications and real-time monitoring systems.
• Low Power Consumption: Energy-efficient design reduces operating temperature and extends the lifespan of your system components.
• Easy to Use: Clear, straightforward pin layout with a 5.08mm / 0.2-inch pitch 2P terminal block for convenient RS-485 wiring. Simply connect the pins and you're ready to go.
• Full Pin Access: All MAX485 chip pins are exposed, giving you complete control via your microcontroller for flexible configuration.

Specifications

• Chip: MAX485CSA — Low-power, slew-rate-limited RS-485/RS-422 transceiver
• Operating Voltage: 5V TTL
• Max Transmission Distance: 1,200+ meters
• Terminal Block Pitch: 5.08mm / 0.2 in (2P)
• Module Dimensions: 44 × 14 × 20 mm (1.73 × 0.55 × 0.79 in)
• Condition: Brand New
• High-Concern Chemicals: None

What's in the Box

• 1 × MAX485 RS-485 TTL to RS485 Converter Module

Compatible With

Arduino UNO, Arduino Mega, Arduino Nano, Raspberry Pi, ESP32, ESP8266, STM32, and other 5V TTL microcontrollers and development boards.

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Learn More About RS-485 Communication Standards

For an overview of serial communication interfaces and standards, visit the National Institute of Standards and Technology (NIST).

Frequently Asked Questions

Q: What is the MAX485 module used for in Arduino projects?

A: The MAX485 TTL to RS485 converter module is used to enable RS-485 serial communication between an Arduino or other microcontroller (MCU) and RS-485-compatible devices. It converts the TTL-level signals from your MCU into differential RS-485 signals, allowing reliable data transmission over long distances (up to 1,200 meters) and in electrically noisy environments.

Q: What operating voltage does the MAX485 module require?

A: The MAX485 RS-485 converter module operates at 5V TTL, making it directly compatible with Arduino UNO, Arduino Mega, and most other standard microcontroller development boards.

Q: How many devices can be connected on an RS-485 network using this module?

A: The RS-485 protocol supported by this MAX485 module allows for multi-node communication, meaning multiple devices can be connected on the same bus. The MAX485CSA chip supports up to 32 nodes on a single RS-485 network, making it suitable for building distributed sensor systems or industrial communication networks.

Q: Is the MAX485 module compatible with 3.3V microcontrollers like ESP32 or Raspberry Pi?

A: This module is rated for 5V TTL operation. For use with 3.3V microcontrollers such as ESP32 or Raspberry Pi, a logic level converter is recommended to avoid potential damage to the lower-voltage GPIO pins.