XY-485 TTL to RS485 Converter Module

XY-485 TTL to RS485 Converter Module

The XY-485 TTL to RS485 Converter Module is designed with a wide voltage power supply range of 3.0V to 30V and is fully compatible with both 3.3V and 5.0V systems and signal levels. This module provides bidirectional conversion between TTL and RS485 signals.

It is important to note that RS485 is a half-duplex communication protocol, meaning that data can be transmitted in both directions but not simultaneously. Communication must take place alternately, with each side acting as a transmitter and receiver in turn.

This module supports automatic flow control, automatically switching between transmission and reception modes. This allows it to be easily operated like a standard serial port without the need for manual direction control.

Supporting baud rates between 110 and 256,000 bps, it provides flexibility for various communication requirements.

Features

• Signal compatibility: Fully compatible with 3.3V and 5.0V logic levels, ensuring seamless integration with a wide range of systems.
• High EMC and EMI performance: Excellent electromagnetic compatibility and interference resistance ensure stable operation in harsh environments.
• Industrial-grade design: Manufactured with high-quality imported chips for superior performance and features a robust anti-interference and lightning protection design.
• Extended operating range: Supports communication distances up to 1 km (tested with 850 meters of 2×1.5mm² cable). Repeaters are recommended for distances exceeding 800 meters. Wide temperature tolerance: Operates reliably in harsh conditions within a working temperature range of -40°C to +85°C. Easy connection: Includes a terminal block and high-quality silicone cables for easy wiring. Signal status indicators: RXD and TXD LEDs provide real-time visual feedback of transmission and reception activity. Strong lightning and overvoltage protection: Designed with enhanced protection for RS485 bus lines. The "GND" pin can be grounded for better protection in long-distance or industrial environments. Grounding is optional for indoor or short-distance use. Standard 2.54 mm pin headers: Supports easy integration and secondary development. Built-in 120Ω termination resistor: Enabled by short-circuiting the R0 jumper. Recommended for long-distance installations.
• Supports multi-node communication: Can connect at least 40 nodes on the same RS485 network.
• Hot-swappable: Can be securely connected or disconnected without communication lockups or signal failure.
• Optimized PCB layout: Anti-interference alignment and copper routing help prevent signal degradation caused by interference.

Technical Specifications

• Model: XY-485
• Power Supply: 3.0V–30V DC
• Logic Level Compatibility: 3.3V / 5.0V systems
• Communication Interface: TTL ↔ RS485, half duplex
• Baud Rate: 256,000 Up to bps
• Transmission Distance: Up to 1,000 meters (recommended ≤800m)
• Operating Temperature: -40°C to +85°C
• Protection Features: Lightning protection, interference prevention, EMC/EMI optimization
• Indicators: RXD / TXD LEDs
• Connection: Terminal block, silicone cables, standard 2.54 mm header
• Termination Resistance: 120Ω (optional with jumper)
• Multiple Node Support: ≥40 nodes per RS485 network
• Hot Switching: Supported

Size