MAX3485 TTL to RS485 Converter Module - 3.3V Logic
MAX3485 TTL to RS485 Converter Module - 3.3V Logic - Image 2
SKU: SENS-2888
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MAX3485 TTL to RS485 Converter Module - 3.3V Logic

₹197.00 (Inclusive of all taxes)
Out of Stock

The MAX3485 Module is a 3.3V TTL to RS485 differential converter, providing robust, noise-resistant serial communication for microcontrollers like Arduino, Raspberry Pi, ESP32, and STM32 in industrial automation and sensor networks.

Features

  • 3.3V TTL logic to RS-485 differential signal conversion.
  • High-speed, noise-resistant data transmission over extended distances.
  • Low power consumption ideal for embedded and battery-powered systems.
  • Compact PCB footprint (37mm x 17mm) for space-constrained designs.
  • Direct compatibility with popular 3.3V microcontroller development platforms.

Out of stock

Description

The MAX3485 Module facilitates reliable serial communication by converting 3.3V TTL logic signals to the RS-485 differential standard. This enables robust, multi-drop data transmission over long cable runs in electrically noisy industrial environments, a common requirement for sensor networks, PLCs, and building automation systems.

Based on the MAX3485 IC, the module provides receiver and driver enable control, supporting half-duplex communication. Its 3.3V operation ensures direct compatibility with modern low-voltage microcontrollers without requiring level-shifting circuitry, simplifying integration into embedded designs for data acquisition and control.

Key Features

  • Integrates the MAX3485 RS-485 transceiver IC for reliable signal conversion.
  • Operates from a single 3.3V DC power supply, matching common MCU logic levels.
  • Supports high-speed data rates suitable for industrial Modbus RTU and other serial protocols.
  • Features built-in fail-safe biasing for stable line conditions when idle.
  • Compact and lightweight PCB design for easy integration into prototypes or enclosures.
  • Provides screw terminal or pin header options for robust wiring connections.
  • Engineered for stable performance across industrial temperature ranges.

Applications

  • Industrial sensor networks (e.g., temperature, pressure, flow transmitters) using RS-485 Modbus.
  • Building automation systems for connecting 3.3V controllers to HVAC, lighting, or access control panels.
  • Embedded data acquisition systems requiring long-distance, noise-immune communication.
  • Robotics and CNC machine control for serial command transmission to motor drivers or I/O modules.
  • Renewable energy monitoring systems interfacing inverters or meters with a central data logger.

Technical Specifications

Item TypeConverter Module
Model Number / NameMAX3485
Operating Voltage3.3V DC
InterfaceTTL (Rx, Tx, Control) to RS-485 (A, B)
CommunicationHalf-Duplex RS-485
Data RateUp to 10 Mbps (typical for MAX3485 IC)
Dimensions (L x W)37 mm x 17 mm
Weight5 g

Frequently Asked Questions

What is the operating voltage range for this MAX3485 module?

This module is designed for a strict 3.3V DC power supply to match the logic level of modern microcontrollers like ESP32 or STM32. Applying 5V can damage the MAX3485 IC and other onboard components. Always verify your system's logic voltage before connecting.

How do I wire this module to my microcontroller for basic communication?

Connect the module's VCC and GND to your 3.3V power source. Link the microcontroller's TX pin to the module's RX (or DI) pin and the RX pin to the module's TX (or RO) pin. For half-duplex RS-485 operation, you may also need to control the Driver Enable (DE) and Receiver Enable (RE) pins, often tied together and controlled by a GPIO pin.

What is the maximum data rate and cable length supported?

The MAX3485 IC supports data rates up to 10 Mbps. Practical cable length depends on data rate and environment; at lower speeds like 9600 baud used for Modbus, reliable communication can extend beyond 1000 meters with proper cabling. For best results, use twisted-pair cable for the RS-485 A and B lines and terminate the line with a 120-ohm resistor at the farthest node.

Is this module suitable for industrial Modbus RTU networks?

Yes, this module is commonly used as a slave node interface in 3.3V-based Modbus RTU networks. It converts the microcontroller's UART TTL signals to the differential RS-485 bus. Ensure your firmware implements the Modbus protocol correctly and configures the correct baud rate, parity, and stop bits on the UART.

Package Includes

  • 1 x MAX3485 TTL to RS485 Converter Module

Additional Information

Weight 0.005 kg
Dimensions 3.7 × 1.7 cm

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