Converters, Modules and Breakout Boards
MAX490 RS422 Bidirectional Full Duplex Two-Way RS-422 to TTL Signal Conversion Module
- 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.
Availability:
In stock
₨ 1,200
In stock
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 Conversion
Converts RS422 differential signals to TTL UART for microcontroller compatibility. - Long-Distance Communication
Supports reliable data transmission over long distances (up to 1200m). - Strong Anti-Interference
Differential signaling reduces noise, ideal for industrial environments. - High-Speed Data Transfer
Supports fast communication for real-time applications. - Wide Compatibility
Works with Arduino, Raspberry Pi, ESP32, STM32, PLCs, and more. - Easy to Use
Simple pinout for quick wiring and integration. - Compact & Durable Design
Suitable 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.
- 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
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