RS485 TTL Auto DirectionSKU 2112

Sensors & Modules

RS485 TTL Auto Direction

₹70

01 — About

What it does

The RS485 to TTL Auto Direction Converter Module is a compact communication interface board designed to convert TTL serial signals to RS485 differential signals and vice versa. Featuring automatic transmit/receive direction control, this module eliminates the need for software direction switching, simplifying the implementation of reliable long-distance serial communication systems.

Key features

  • Automatic transmit/receive direction control
  • No software control required for direction switching
  • Supports half-duplex RS485 communication
  • TTL to RS485 and RS485 to TTL signal conversion
  • Long-distance communication support
  • High noise immunity
  • Compact and easy-to-integrate design
  • Suitable for microcontroller interfacing

Good to know

  • The module supports only half-duplex RS485 communication.
  • Ensure correct A and B line polarity while wiring the RS485 bus.
  • Use twisted-pair cable for long-distance communication.
  • Termination resistors may be required for long cable runs.
  • The module operates with TTL logic levels and should not be connected directly to RS232 interfaces.
  • For optimal communication reliability, maintain proper grounding between connected devices.

02 — Datasheet

Specifications

10
Communication Standard
RS485 Half-Duplex
Logic Interface
TTL UART
Operating Voltage
3.3V – 5V DC
Direction Control
Automatic TX/RX Switching
Communication Distance
Up to 1200 meters (theoretical)
Baud Rate
Up to 115200bps (module dependent)
Communication Mode
Half-Duplex
Interface Pins
VCC, GND, TXD, RXD, A, B
ESD/Protection
Onboard protection circuitry (module dependent)
Dimensions
Compact PCB Module