TTL to RS485 module

This module is designed to conveniently convert TTL-level signals to RS485, enhancing compatibility and enabling smooth data communication between different devices.

Features:

• Includes a 120-ohm termination resistor; enabling the resistor by shorting the R0 pin is recommended for long-distance communication.
• Supports multi-device communication, allowing at least 40 nodes to be connected on the same RS-485 network.
• Designed with anti-interference wiring and copper layout techniques to effectively minimize signal disruption.
• Features a standard 2.54mm pin header, making it easy to integrate into custom development projects.
• The module is engineered with careful attention to RS-485 bus architecture and interference protection, offering strong electromagnetic compatibility (EMC) and excellent EMI resistance.
• For outdoor or long-distance setups, grounding the module’s earth terminal improves stability and reduces interference.
• Comes with insulated wires and terminal connectors for ease of installation.
• Equipped with TXD and RXD LED indicators to monitor data transmission and reception status.

Specifications:

• Broad input voltage range: 3.0V to 30V
• Maximum voltage limit: 33V (recommended operating range is up to 30V; minimum voltage should be above 2.8V)
• Compact size: 52 × 23 × 11 mm (2 × 0.9 × 0.4 in)
• Compatible with both 3.3V and 5.0V systems, making it suitable for use with various modules.
• Offers excellent electromagnetic compatibility (EMC) and electromagnetic interference (EMI) resistance.
• Built with high-quality imported components and an industrial-grade design for robust anti-interference performance.
• Incorporates a high-power RS-485 interface ideal for industrial environments and demanding conditions.
• Operates reliably in a wide temperature range from -40°C to +85°C. Communication distances can reach up to 1km (tested with 850m of 2*1.5mm² cable; for best performance, use within 800 meters or add a signal repeater if exceeding that).

Applications

• Microcontroller Serial Communication over Long Distances
• Modbus Protocol Implementation
• Industrial Automation