XY-K485 TTL Serial Port to RS485 Converter Board
The XY-K485 TTL to RS485 Converter Board is an industrial-grade communication module designed to convert TTL serial signals into RS485 half-duplex communication signals. It features automatic transmit/receive direction control, eliminating the need for software flow control. Supporting both 3.3V and 5V logic levels, the module offers excellent compatibility with microcontrollers, PLCs, and embedded systems. Built with strong EMI/EMC protection, lightning protection circuitry, and anti-interference design, it is suitable for industrial and outdoor applications. The module supports baud rates up to 256000bps, multi-node networking, and long-distance communication up to 800 meters or more under appropriate conditions.
تُعد لوحة XY-K485 لتحويل TTL إلى RS485 وحدة اتصال صناعية مصممة لتحويل إشارات المنفذ التسلسلي TTL إلى إشارات RS485 نصف مزدوجة. تتميز بالتحكم التلقائي في اتجاه الإرسال والاستقبال دون الحاجة إلى تحكم برمجي إضافي. تدعم إشارات 3.3 فولت و5 فولت مما يجعلها متوافقة مع العديد من المتحكمات الدقيقة وأنظمة التحكم. كما توفر حماية قوية ضد التداخل الكهرومغناطيسي والصواعق، مما يجعلها مناسبة للبيئات الصناعية والتطبيقات الخارجية. تدعم الوحدة معدلات نقل تصل إلى 256000 بت/ثانية واتصالاً لمسافات طويلة وشبكات متعددة العقد.
The XY-K485 TTL to RS485 Converter Board is a high-performance communication interface module that enables reliable conversion between TTL-level serial signals and RS485 differential bus signals. Designed for industrial automation, embedded systems, and long-distance data transmission applications, the module simplifies RS485 communication by automatically controlling the transmit and receive directions.
RS485 is a half-duplex communication protocol that allows bidirectional data transfer over a shared communication line. The XY-K485 module automatically manages data flow direction, eliminating the need for software-based switching and making operation as simple as using a standard UART serial port.
The module utilizes an industrial-grade communication chip and incorporates advanced PCB design techniques to provide excellent resistance to electromagnetic interference (EMI) and electromagnetic compatibility (EMC) issues. Integrated lightning protection and grounding support further enhance communication reliability in harsh industrial and outdoor environments.
Supporting a wide operating voltage range from 3.0V to 30V DC, the module is compatible with both 3.3V and 5V microcontroller systems. It supports baud rates from 110bps to 256000bps and allows networking of up to 40 or more devices on the same RS485 bus.
A built-in 120Ω termination resistor can be enabled via the R0 jumper for long-distance communication lines. The module also includes TXD and RXD status LEDs for easy monitoring of communication activity and supports hot-swapping without signal interference.
Specifications
| Parameter | Value |
|---|---|
| Product Name | XY-K485 TTL to RS485 Converter Board |
| Communication Type | TTL to RS485 Converter |
| RS485 Mode | Half-Duplex |
| Direction Control | Automatic TX/RX Switching |
| Supply Voltage | 3.0V – 30V DC |
| Maximum Recommended Voltage | 30V DC |
| Absolute Maximum Voltage | 33V DC |
| Minimum Operating Voltage | 2.8V DC |
| Logic Level Compatibility | 3.3V and 5V TTL |
| Baud Rate Range | 110 – 256000 bps |
| Network Capacity | 40+ Nodes |
| Termination Resistor | Built-in 120Ω (R0 Jumper Selectable) |
| Connector Type | 2.54mm Pin Header |
| Communication Distance | Up to 800m recommended, longer with repeaters |
| Indicators | TXD and RXD LEDs |
| Hot Swap Support | Yes |
| EMI/EMC Protection | Yes |
| Lightning Protection | Yes |
| Grounding Terminal | Yes |
Applications
- Industrial automation systems
- PLC communication networks
- Modbus RTU networks
- Smart agriculture systems
- Building automation systems
- Remote sensor monitoring
- Data acquisition systems
- Embedded control systems
- Long-distance serial communication
- Energy management systems
- Security and surveillance systems
- Smart metering applications
- Robotics and automation projects
- RS485 multi-device communication networks
- Arduino, ESP32, STM32, and Raspberry Pi projects