MAX490 RS422 Bidirectional Full Duplex Two-Way RS-422 to TTL Signal Conversion Module

MAX490 RS422 Bidirectional Full Duplex Two-Way RS-422 to TTL Signal Conversion Module

₨1,320.00

RS422 interface, two-way communication. A B Y Z ultra-long transmission 1000 meters.
The module has 15KV ESD protection. Add 10 ohm overcurrent protection resistor to the board. The module comes with TVS diodes. Anti-lightning, anti-spike voltage.
The module has 120 ohm terminating resistance, can reduce long-distance communication echo interference effectively.
A power indicator and data transceiver indicator. Data status panoramic view. The module TTL side uses 5V DC power supply RXD TXD compatible 5V logic signal.
The module uses high-quality MAX490 chip, stability and communication speed is extremely high, up to 2.5MBPS.

SKU: 1919 Categories: Converters, Modules and Breakout Boards

Description
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MAX490 RS422 Bidirectional Full Duplex Two-Way RS-422 to TTL Signal Conversion Module
Product Description
The RS422 to TTL Converter Module is a reliable interface solution designed to convert RS422 differential signals into standard TTL (UART) signals for seamless communication with microcontrollers and embedded systems.
This module is ideal for industrial and long-distance communication applications where RS422 is used for noise-resistant data transmission. It allows easy integration with devices like Arduino, Raspberry Pi, STM32, and other TTL-based controllers, enabling stable and accurate data exchange.
Specifications

Module Type: RS422 to TTL Converter
Communication Standard: RS422 (Differential) ↔ TTL UART
Logic Level (TTL Side): 3.3V / 5V compatible
Power Supply: 3.3V – 5V DC
Baud Rate: Up to 2.5 Mbps (typical, depending on chip)
Interface (TTL Side): TX, RX, VCC, GND
Interface (RS422 Side): A+, A−, B+, B− (Differential Lines)
Transmission Distance: Up to 1200 meters (RS422 standard)
Operating Temperature: -40°C to +85°C (typical)
Protection: Basic ESD protection (varies by module design)
Board Type: Compact industrial-grade module

Key Features

Signal ConversionConverts RS422 differential signals to TTL UART for microcontroller compatibility.
Long-Distance CommunicationSupports reliable data transmission over long distances (up to 1200m).
Strong Anti-InterferenceDifferential signaling reduces noise, ideal for industrial environments.
High-Speed Data TransferSupports fast communication for real-time applications.
Wide CompatibilityWorks with Arduino, Raspberry Pi, ESP32, STM32, PLCs, and more.
Easy to UseSimple pinout for quick wiring and integration.
Compact & Durable DesignSuitable for embedded systems and industrial setups.

Pinout Configuration

The module typically features two main connection headers:

1. TTL/MCU Side:

VCC: 5V Power Supply
GND: Ground
TXD: Transmitter Data Input (connects to MCU RX pin)
RXD: Receiver Data Output (connects to MCU TX pin) [1]

2. RS-422 Side:

A: Non-inverting driver output / Non-inverting receiver input
B: Inverting driver output / Inverting receiver input
Y: Non-inverting driver output / Non-inverting receiver input
Z: Inverting driver output / Inverting receiver input

(Note: Differential pairs link up directly to your remote RS-422 device—connect A to A, B to B, etc.)

Wiring Example (To a Microcontroller)

To connect the module to an Arduino or similar 5V development board:

Connect VCC and GND to the microcontroller’s 5V and GND.
Connect the module’s RXD pin to the microcontroller’s TX (Transmit) pin.
Connect the module’s TXD pin to the microcontroller’s RX (Receive) pin.
Wire your differential RS-422 bus to the A, B, Y, Z terminals.