TTL to RS485 Power Supply Converter Board

The TTL to RS485 Power Supply Converter Board is a small module that converts a microcontroller's 3.3 V or 5 V UART signals into an RS485 differential bus. Hardware automatic flow control switches between sending and receiving by itself, so you only need the TX and RX pins, with no extra direction pin. It is ideal for Modbus sensors, industrial devices and long cable runs.

TTL to RS485 Converter Specifications

• Supply voltage: 3.3 V or 5 V
• Logic side: TTL serial (UART) at 3.3 V or 5 V
• Direction control: automatic (hardware), no DE/RE pin needed
• TTL connections: VCC, GND, TX and RX
• RS485 connections: A and B differential terminals
• Mode: half-duplex, 2-wire RS485

TTL to RS485 Applications

• Reading Modbus RTU sensors, energy meters and PLCs
• Long-distance serial links between Arduino or ESP32 boards
• Industrial and building automation networks
• Connecting solar inverters and charge controllers that use RS485

What's in the Box

• 1 × TTL to RS485 converter board

Tip: Connect A to A and B to B on every device, use twisted-pair cable for long runs, and fit a 120 Ω termination resistor at each end of the bus. If no data comes through, try swapping TX and RX on the TTL side, as labelling differs between boards.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.