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.
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