The MAX485 RS-485 Module TTL to RS-485 Converter is a reliable and cost-effective communication interface designed to connect Arduino and other microcontroller platforms with RS-485 industrial networks. Powered by the MAX485 transceiver IC, this module enables stable half-duplex RS-485 communication using standard TTL serial signals. Offered by BDTronics, it is suitable for office automation, industrial control, data acquisition, and long-distance serial communication projects in Bangladesh.

RS-485 is an industry-standard differential communication protocol that supports multi-drop networking, long cable distances, and high data integrity in electrically noisy environments. This module allows up to 32 devices to communicate on the same bus, over distances up to 1.2 km, with data rates reaching up to 10 Mbps under suitable conditions. The compact design, low power consumption, and easy wiring make it ideal for Arduino, ESP8266, ESP32, PIC, AVR, and other microcontroller-based systems.

Features:

• Onboard MAX485 low-power RS-485 transceiver chip

• TTL to RS-485 level conversion for microcontroller compatibility

• Slew-rate limited transceiver for reliable and stable communication

• Supports half-duplex RS-485 communication

• Low power consumption suitable for embedded systems

• Onboard 5.08mm pitch 2-pin terminal block for easy RS-485 wiring

• All MAX485 chip pins are broken out for full control via microcontroller

• Multiple modules can be connected on the same RS-485 bus

• Compact module design for easy integration

• Suitable for industrial and office automation applications

Specifications:

• Product Type: TTL to RS-485 Converter Module

• IC Used: MAX485

• Communication Protocol: RS-485 (Half-Duplex)

• Logic Level: TTL

• Maximum Devices on Bus: Up to 32 nodes

• Maximum Cable Length: Up to 1.2 km (4000 ft)

• Maximum Data Rate: Up to 10 Mbps

• Terminal Type: 5.08mm pitch 2-pin screw terminal

• Power Consumption: Low power design

• Isolation: Non-isolated

• Compatibility: Arduino, ESP8266, ESP32, AVR, PIC, STM32, microcontrollers

How to Use:

• Connect the module VCC and GND to the microcontroller power supply

• Connect RO (Receiver Output) to the microcontroller RX pin

• Connect DI (Driver Input) to the microcontroller TX pin

• Control DE and RE pins using GPIO for transmit and receive switching

• Connect A and B terminals to the RS-485 bus wiring

• Ensure proper termination and biasing for long cable runs

• Upload suitable serial communication code to the microcontroller

• Test data transmission between RS-485 devices

Applications:

• Arduino and microcontroller RS-485 communication projects

• Industrial automation and control systems

• PLC and sensor network communication

• Building automation and access control systems

• Long-distance serial data transmission

• Data logging and monitoring systems

• Office automation and device networking

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