MAX485 TTL To RS485 Converter Module

MAX485 TTL to RS485 Converter Module is used to connect your microcontroller to a network that spans over a kilometer, even in noisy environments.

The MAX485 TTL to RS485 Converter Module makes this possible by enabling seamless communication between TTL-level devices (like Arduino, Raspberry Pi, or other microcontrollers) and RS485 networks.

Powered by the MAX485 transceiver chip, this module offers robust, long-distance serial communication with low power consumption. Its compact design and compatibility with both 3.3V and 5V logic levels make it a versatile choice for a wide range of applications.

Specifications :

Specification	Details
Chipset	MAX485
Operating Voltage	3.3V to 5V DC
Data Rate	Up to 2.5Mbps
Maximum Distance	Up to 1.2km (4000ft)
Number of Devices	Up to 32 on the RS485 bus
Pins	RO, RE, DE, DI, GND, VCC, A, B
Dimensions	45mm x 15mm x 14mm
Weight	4g
Protection Features	Short-circuit current limiting, thermal shutdown, receiver fail-safe
Termination	Built-in 120-Ohm resistor network
Communication Type	Half-duplex
Additional Features	Power and Data Transmission LEDs

features :

• Long-distance communication: Transmit data up to 1.2km (4000ft), depending on data rate and environment.
• Noise immunity: Uses differential signaling to ensure reliable data transfer in industrial or electrically noisy settings.
• Multi-device networks: Connect up to 32 devices on a single RS485 bus for efficient communication.
• Ease of integration: Breadboard-friendly with clearly labeled pins for quick setup.
• Supports data rates up to 2.5Mbps for fast communication.
• Compatible with 3.3V and 5V logic levels, ensuring versatility across microcontrollers.
• Half-duplex communication enables bidirectional data transfer on a single bus.
• Built-in 120-Ohm termination resistor for proper RS485 bus termination.
• Low power consumption (120µA to 500µA quiescent current) for energy-efficient designs.
• Breadboard-friendly design with standard 0.1″ pin spacing for easy prototyping.
• Includes indicators for power and data transmission (on some variants).
• Protection features: Current-limiting, thermal shutdown, and receiver fail-safe for enhanced reliability.

Pin Descriptions :

• RO (Receiver Output): Outputs the received data to the microcontroller.
• RE (Receiver Enable): Enables or disables the receiver (active low).
• DE (Driver Enable): Enables the driver for transmitting data (active high).
• DI (Driver Input): Inputs data from the microcontroller to be transmitted.
• GND: Ground connection.
• VCC: Power supply (3.3V or 5V).
• A, B: RS485 differential signal lines for the communication bus.

Applications :

• Industrial Automation: Facilitates communication in control systems, PLCs, and SCADA setups.
• Building Automation: Powers HVAC, lighting control, and security system networks.
• IoT and Sensor Networks: Enables remote sensor data collection and monitoring over long distances.
• Long-Distance Serial Communication: Connects devices separated by significant distances.
• Multi-Drop Networks: Supports communication between multiple devices on a single bus.
• Robotics and Embedded Systems: Interfaces microcontrollers with RS485-compatible devices