DIYables RS422 to TTL Module for Arduino, ESP32, ESP8266, Raspberry Pi, 2 Pieces…
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Quick Overview
This DIYables RS422 to TTL module enables long-distance serial communication up to 1000 meters using the MAX490 chip for Arduino, ESP32, and ESP8266 projects. The module supports bidirectional communication through differential signal channels (A, B, Y, Z) with data rates up to 2.5 Mbps.
The module features comprehensive protection including 15KV ESD protection, TVS diode for lightning and peak voltage protection, and 10-ohm overcurrent protection resistor. The built-in 120-ohm terminating resistance minimizes echo interference in long-distance communication, ensuring stable and reliable data transmission.
Ideal for industrial automation, remote sensor networks, building automation, multi-device communication systems, and any application requiring noise-immune long-distance serial communication. The RS422 differential signaling provides excellent noise immunity compared to standard TTL serial.
Key Features
- MAX490 Chip — Reliable RS422 differential signal transceiver
- Long Distance Communication — Up to 1000 meters transmission range
- High-Speed Data Transfer — Up to 2.5 Mbps communication speed
- 15KV ESD Protection — Protects module and connected devices from electrostatic discharge
- TVS Diode Protection — Lightning and peak voltage protection
- 10-Ohm Overcurrent Resistor — Integrated overcurrent protection
- 120-Ohm Terminating Resistance — Built-in termination minimizes echo interference
- Differential Signaling — Channels A, B, Y, Z for noise-immune communication
- Bidirectional Communication — Two-way serial data transmission
- Industrial Grade — Reliable for harsh environment applications
- Tutorial Support — Comprehensive guides for Arduino, ESP32, ESP8266
- Versatile Applications — Industrial automation, remote sensors, building automation, multi-device systems
SPECIFICATION
| Specification | Value |
|---|---|
| Product Type | RS422 to TTL Converter Module |
| Chip | MAX490 |
| Communication Standard | RS422 differential signaling |
| Channels | A, B, Y, Z (differential pairs) |
| Max Distance | Up to 1000 meters (3280 feet) |
| Max Data Rate | 2.5 Mbps |
| ESD Protection | ±15KV |
| Overcurrent Protection | 10-ohm resistor |
| Lightning Protection | TVS diode |
| Terminating Resistance | 120-ohm built-in |
| TTL Interface | Standard UART (RX, TX) |
| Operating Voltage | 3.3V to 5V (typical) |
| Quantity | 2 pieces |
| Compatibility | Arduino, ESP32, ESP8266, any UART-capable microcontroller |
| Applications | Industrial automation, remote sensor networks, building automation, long-distance serial communication |
Tutorials
COMPATIBLE HARDWARE
- Arduino boards (UNO, Mega, Nano, etc.) — Hardware Serial or SoftwareSerial
- Arduino Uno R4 WiFi/Minima — Serial communication pins
- ESP32 development boards — UART pins (HardwareSerial)
- ESP8266 boards (NodeMCU, Wemos D1, etc.) — Serial or SoftwareSerial
- Arduino Nano ESP32 — Hardware Serial pins
- Any microcontroller with UART — TTL serial interface
- Industrial automation systems — Long-distance sensor/control communication
- Remote sensor networks — Multi-node distributed systems
- Building automation — HVAC, lighting, access control
- PLC systems — Programmable logic controller interfaces
- Data acquisition systems — Long-distance sensor reading
- Multi-device communication — Point-to-multipoint networks
