MAX485 RS-485 Transceiver Module (5V, Half-Duplex, 2.5Mbps)

The MAX485 is an RS-485 transceiver module that converts UART TTL signals to balanced RS-485 differential signals. It enables long-distance serial communication up to 1200 meters at reduced speeds, making it ideal for industrial control, sensor networks, and multi-drop systems. The module operates at 5V and supports half-duplex communication with up to 32 transceivers on the same bus.

Key Specifications

What You Can Build With This

• Industrial sensor network for temperature and humidity monitoring over long distances
• DMX512 lighting controller for stage and architectural lighting
• Multi-master Arduino communication system for home automation
• Remote data logging station using RS-485 soil sensors

Compatibility

This module works directly with 5V microcontrollers like Arduino Uno and Mega. It can interface with 3.3V boards (ESP32, Raspberry Pi) using logic level shifting or by ensuring the module's 5V tolerant inputs. Common pairings include additional MAX485 modules for multi-device buses or USB-to-RS-485 converters for PC communication.

Wiring Notes

Connect DI to the microcontroller's TX pin, RO to RX, and tie a common ground between all devices on the bus. For half-duplex operation, connect DE and RE pins together and control them with a single GPIO to switch between transmit and receive. Use 120-ohm termination resistors at both ends of the bus to minimize signal reflections on long cables.

Why Buy from Compoden

Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.