The MAX485 module is a high-speed transceiver designed for RS-485 serial communication, allowing microcontrollers like Arduino to communicate over long distances (up to 1.2km). It converts TTL level signals to the balanced differential signals required for the RS-485 standard, providing high noise immunity and supporting multi-point communication with up to 32 nodes on a single bus.

Specifications

• Transceiver IC: MAX485CSA
• Operating Voltage: 5V DC
• Data Rate: Up to 2.5 Mbps
• Bus Capacity: Supports up to 32 nodes on a single bus
• Communication Distance: Up to 1200 meters (depending on baud rate and cable quality)
• Onboard Components: Includes 5.08mm pitch 2P terminal blocks for easy RS-485 wiring
• I/O Ports:
  • RO (Receiver Output)
  • RE (Receiver Enable - active low)
  • DE (Driver Enable - active high)
  • DI (Driver Input)
• RS-485 Interfaces:
  • A (Non-inverting signal)
  • B (Inverting signal)

Features

• Low Power Consumption: Designed with the MAX485 low-power transceiver for efficient operation in embedded systems.
• Half-Duplex Support: Easily toggled between transmit and receive modes by controlling the RE and DE pins.
• Noise Immunity: Uses differential signaling to significantly reduce electromagnetic interference over long cable runs.
• Compact Layout: Small PCB footprint with 2.54mm pitch headers for breadboard compatibility and a 5.08mm terminal for secure industrial wiring.
• Onboard Power LED: Visual confirmation of the 5V power supply status.

Common Applications

• Long-distance serial communication between microcontrollers
• Industrial automation and Modbus RTU communication
• Building automation and lighting control systems (DMX512)
• Remote sensor data acquisition and telemetry