The XY-017 is an industrial-grade TTL to RS485 converter module designed for reliable serial communication in environments with high electromagnetic interference. Unlike basic converters, this module features automatic flow control, eliminating the need for a "Receive/Transmit" enable pin, and includes integrated hardware protection such as lightning strikes and anti-static measures.

Specifications

• Operating Voltage: 3.3V to 5.0V (Compatible with both logic levels)
• Data Rate: Standard serial baud rates (up to 500Kbps)
• Transmission Distance: Up to 800 meters (using 850m 2*1.5 cable; recommended within 800m)
• Operating Temperature: -40°C to +85°C (Industrial grade)
• Bus Capacity: Supports up to 128 nodes on the same bus
• TTL Interfaces:
  • VCC (Power)
  • TXD (Transmit)
  • RXD (Receive)
  • GND (Ground)
• RS-485 Interfaces:
  • A (Non-inverting signal)
  • B (Inverting signal)

Features

• Automatic Flow Control: Hardware-based automatic direction switching allows for seamless communication using only RX and TX lines, simplifying code and hardware requirements.
• Industrial Protection: Features 600W lightning and surge protection, $\pm$15KV ESD (static) protection, and a 120-ohm termination resistor (optional/onboard).
• Signal Integrity: Designed with high-quality thick copper traces and impedance matching to maintain signal quality over long cable runs.
• Status Indicators: Includes RXD and TXD signal indicator LEDs for real-time monitoring of data transmission and reception.
• Global Compatibility: Standard 2.54mm pitch headers for the TTL side and 5.08mm screw terminals for the RS-485 bus side.

Common Applications

• Industrial automation and Modbus RTU networking
• Remote data acquisition and long-distance sensor monitoring
• Building security systems and access control
• Smart home energy monitoring (Smart Meters)