WINGONEER TTL to RS485 Adapter Module (3.3V/5V) User Manual

1. Konec produktuview

The WINGONEER TTL to RS485 Adapter Module is designed for converting TTL serial signals to RS485 signals. This module offers full compatibility with both 3.3V and 5.0V power supplies and signal levels, making it versatile for various microcontroller applications. It facilitates robust and long-distance communication between microcontrollers and RS485 devices, even in industrial or harsh outdoor environments.

Key features include signal indicator LEDs for RXD and TXD, industrial-grade chip design with strong anti-interference capabilities, and effective lightning protection. Its compact size and standard 2.54mm pitch design simplify integration and secondary development.

2. Vlastnosti

• svtage Kompatibilita: Fully compatible with 3.3V and 5.0V power supplies and signal levels.
• Provozní teplota: Wide range from -40°C to +85°C.
• Kompaktní design: Dimensions of 42.8mm × 15.22mm × 0.8mm.
• Indikátory signálu: RXD and TXD signal indicator LEDs to monitor transmit/receive status.
• Dlouhá přenosová vzdálenost: Supports transmission up to 800 meters (recommended), tested up to 850 meters. For distances exceeding 800 meters, a repeater is advised.
• Průmyslová třída: Features an imported industrial-grade chip design with strong anti-interference capability and effective lightning protection.
• Snadná integrace: 0.8mm thick PCB with semi-hole processing, suitable for integration into other boards and easy terminal soldering.
• Sekundární vývoj: Standard 2.54mm pitch design for convenient prototyping and secondary development.
• Zakončovací odpor: Integrated 120-ohm termination resistor, selectable via a shorting jumper (R0), for stable long-distance data transfer.
• Multi-Machine Support: Supports multi-machine communication, enabling up to 128 devices on the bus.
• Vyměnitelné za provozu: Designed to be hot-swappable, preventing signal interruption during connection or disconnection.
• Enhanced Anti-Interference: Wide copper area on the PCB to prevent signal interference.
• Automatické řízení průtoku: Hardware automatic flow control for reliable data transfer.

3. Module Layout and Pinout

The module features clearly labeled pins for easy connection. Below is an image illustrating the top view of the module with its pinout.

Obrázek 1: Nahoře view of the WINGONEER TTL to RS485 Adapter Module, highlighting the GND, RXD, TXD, VCC, A+, and B- pins, along with various electronic components and indicator LEDs.

The bottom side of the module displays the model identifier.

Obrázek 2: Spodní část view of the module, showing the model number 'XY-017' printed on the PCB.

Popis kolíku:

• GND: Zemní spojení.
• RXD: Receive Data (TTL level input from microcontroller).
• TXD: Transmit Data (TTL level output to microcontroller).
• VCC: Power supply input (3.3V or 5V, matching your microcontroller's logic level).
• A+: RS485 differential data line A.
• B-: RS485 differential data line B.

4. Pokyny k nastavení

4.1 Připojení napájení

Connect the VCC pin to your microcontroller's 3.3V or 5V power supply output, ensuring it matches the logic level of your microcontroller. Connect the GND pin to the common ground of your system.

4.2 TTL Serial Connection

• Připojte TXD pin of your microcontroller to the RXD pin of the RS485 module.
• Připojte RXD pin of your microcontroller to the TXD pin of the RS485 module.

4.3 RS485 Bus Connection

Připojte A+ a B- pins of the module to the corresponding A+ and B- lines of your RS485 bus. Ensure consistent polarity across all devices on the bus.

4.4 Termination Resistor (R0)

The module includes a 120-ohm termination resistor. For long-distance communication or in bus configurations with multiple devices, termination resistors are crucial to prevent signal reflections. To enable the internal 120-ohm termination resistor, short the R0 jumper pad on the module. Typically, only the devices at the two ends of the RS485 bus require termination.

5. Návod k obsluze

The WINGONEER TTL to RS485 Adapter Module operates in half-duplex mode, meaning data can be transmitted in one direction at a time. The module features hardware automatic flow control, eliminating the need for external control signals (like DE/RE pins) from the microcontroller to manage data direction.

5.1 Přenos dat

When your microcontroller sends data via its TX pin (connected to the module's RXD), the module automatically converts it to RS485 differential signals and transmits it on the A+ and B- lines. The TXD indicator LED on the module will illuminate during transmission.

5.2 Příjem dat

When RS485 signals are received on the A+ and B- lines, the module automatically converts them to TTL serial signals and outputs them via its TXD pin (connected to your microcontroller's RX pin). The RXD indicator LED on the module will illuminate during reception.

5.3 Konfigurace softwaru

On your microcontroller, configure the UART (Universal Asynchronous Receiver-Transmitter) for the desired baud rate, data bits, parity, and stop bits. Since the module handles flow control automatically, no specific RS485 control pin (like DE/RE) needs to be managed in your software.

6. Údržba

• Skladování: Pokud modul nepoužíváte, skladujte jej v suchém a antistatickém prostředí.
• Zacházení: Handle the module with care to avoid physical damage to components or solder joints.
• Čištění: If necessary, gently clean the module with a soft, dry brush or compressed air. Avoid using liquids or solvents.
• Teplota: Operate and store the module within its specified temperature range (-40°C to +85°C) to ensure optimal performance and longevity.

7. Řešení problémů

• Žádná komunikace:
  • Verify all wiring connections (GND, VCC, RXD, TXD, A+, B-).
  • Zajistěte napájení objtage (3.3V or 5V) matches the module's and microcontroller's logic levels.
  • Check if the microcontroller's UART is correctly configured (baud rate, data bits, parity, stop bits).
  • Confirm that the RS485 bus is properly terminated, especially for long cables or multi-drop networks.
• Přerušovaná komunikace:
  • Check for excessive cable length or poor cable quality.
  • Ensure proper termination resistors are used at both ends of the bus.
  • Zkontrolujte, zda se v blízkosti komunikačních linek nenacházejí zdroje elektromagnetického rušení (EMI).
• Kontrolky LED nesvítí:
  • If neither RXD nor TXD LED lights up, check the VCC and GND connections.
  • If only one LED lights up, verify data flow from the corresponding side (e.g., if TXD LED doesn't light up, check if the microcontroller is sending data).
• Incorrect Data Received:
  • Double-check the baud rate and other UART settings.
  • Ensure consistent data format between transmitting and receiving devices.
  • Verify RS485 A+ and B- polarity.

8. Specifikace

9. Záruka a podpora

Specific warranty information for this product is not provided in the available data. For any technical support or warranty inquiries, please refer to the retailer or manufacturer's official channels where the product was purchased.