RS485 To TTL Converter Module

An RS485 to TTL converter module that bridges the industrial RS485 differential serial bus to standard 3.3 V/5 V TTL UART — allowing any Arduino, Raspberry Pi, or MCU to communicate on Modbus and RS485 networks found in industrial equipment, PLCs, and smart meters.

🔹 Key Applications

• Modbus RTU communication with industrial PLCs and sensors
• RS485 network interfacing from Arduino or Raspberry Pi
• Smart electricity meter data reading
• Industrial sensor and actuator RS485 bus integration
• Building management system data collection
• RS485 multi-drop network nodes

🔹 Why Choose This Module?

• RS485 to TTL conversion — bridge industrial bus to any MCU
• Automatic transmit/receive direction control — no manual DE/RE switching
• Up to 32 nodes on a single RS485 bus
• Up to 1.2 km cable run support
• 3.3 V and 5 V TTL compatible

🔹 Technical Specifications

• Interface: RS485 ↔ UART TTL
• Max Bus Nodes: 32
• Max Cable Length: 1200 m
• Operating Voltage: 3.3 V – 5 V DC
• Direction Control: Automatic

🔹 What's Included

1 × RS485 to TTL Converter Module

🔹 Pro Tip

💡 Terminate the RS485 bus with 120 Ω resistors at both physical ends of the cable run to prevent reflections at baud rates above 9600. Use shielded twisted-pair cable and connect the shield to earth at one end only. The Modbus RTU library for Arduino works seamlessly with this module.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.