MAX485 TTL to RS485 Converter Module

MAX485 TTL to RS485 Converter Module is a compact communication interface that converts TTL serial signals to RS485 differential signals. It is ideal for long-distance and noise-immune serial communication in industrial automation, embedded systems, and networking applications. Built around the MAX485 chip, the module ensures low-power operation and reliable half-duplex communication over twisted pair lines.

Key Features of MAX485 TTL to RS485 Converter Module:

• RS485 Communication: Supports differential signaling for long-distance and high-reliability data transmission.
• MAX485 Chip: Low-power transceiver for RS-485 communication with reduced current consumption.
• Half-Duplex Mode: Uses a single twisted pair for bi-directional data communication.
• Wide Voltage Range: Operates on 5V power supply with TTL-compatible logic levels.
• Simple Interface: Easy to connect with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers.

Technical Specifications of MAX485 TTL to RS485 Converter Module:

• IC Chip: MAX485
• Communication Protocol: RS485 Half-Duplex
• Operating Voltage: 5V DC
• Logic Level: TTL (5V compatible)
• Data Rate: Up to 2.5 Mbps
• Current Consumption: < 300µA in idle mode
• Communication Distance: Up to 1200 meters (with proper cabling)

Mechanical Specifications of MAX485 TTL to RS485 Converter Module:

• PCB Dimensions: Approx. 44mm x 13mm
• Mounting Holes: No
• Connectors: 4-pin header (TTL side), 2-pin terminal block (RS485 side)
• Weight: Approx. 5g

Dimensions:

• Length: 44mm
• Width: 13mm
• Height: ~8mm (with components)

Mounting Options:

• Breadboard Friendly: Can be mounted directly onto standard breadboards for prototyping.
• Soldered Headers: Can be used with jumper wires for custom PCBs or modules.

Schematic Diagram, Connection, Wiring and Pinout of MAX485 TTL to RS485 Module:

• TTL Pins: VCC, GND, RO (Receiver Out), DI (Driver In), DE & RE (Direction Control)
• RS485 Side: A (non-inverting), B (inverting)
• Wiring: Connect A and B to the RS485 network, and TTL pins to MCU UART
• Direction Control: DE and RE can be tied together for direction switching

Datasheet of MAX485 TTL to RS485 Converter Module:

• Download MAX485 Datasheet (PDF)

Applications of MAX485 TTL to RS485 Converter Module:

• Industrial Automation: PLC and SCADA serial communication
• Sensor Networks: Long-distance UART-based sensor communication
• Building Automation: RS485-based HVAC and lighting controls
• Embedded Systems: MCU communication over RS485 bus
• Security Systems: Access control and inter-device communication

Equivalent of MAX485 TTL to RS485 Converter Module:

• SP485: Pin-compatible alternative with similar functionality
• SN75176: Widely used RS485 driver/receiver combo
• ADM485: Low-power differential transceiver from Analog Devices
• LT1785: Enhanced surge protection and ESD rating

Package Includes:

• 1 x MAX485 TTL to RS485 Converter Module