Plinkwirekb 2-in-1 USB to RS485 RS232 Serial Converter

1. Introduction

The Plinkwirekb 2-in-1 USB to RS485 RS232 Serial Converter is designed to provide reliable and versatile serial communication for various applications. This device allows seamless conversion between USB 2.0 and both RS232 and RS485 serial interfaces, utilizing genuine FTDI FT232, SP485, and SP213 chipsets for stable performance. This manual provides essential information for the proper setup, operation, and maintenance of your converter.

Figure 1: Overview of the Plinkwirekb 2-in-1 USB to RS485 RS232 Serial Converter.

2. Product Features

• 2-in-1 Serial Communication: Easily switch between RS232 and RS485 for industrial automation, PLCs, and embedded systems.
• Original FTDI Chipset: Features FTDI FT232, SP485, and SP213 chipsets for reliable performance. Supports Windows 11/10/8/7/XP, Vista, Linux, Android (with OTG), and MacOS.
• 5-Pin Terminal Block: Clearly labeled A+, B-, GND, TX, RX with 3.81mm pitch for convenient, solder-free connections.
• Compact & Durable Design: Small, portable, with gold-plated contacts and TXD/RXD power LED indicators for real-time transmission status monitoring.
• Wide Application: Suitable for industrial automation equipment, instrument control, PLC communication, security monitoring systems, smart home control, building control systems, Modbus RTU, and data acquisition.

3. Specifications

Figure 2: Technical drawing with dimensions and Bill of Materials.

4. Setup

4.1 Driver Installation

The Plinkwirekb 2-in-1 USB to RS485 RS232 Serial Converter utilizes genuine FTDI chipsets, which typically allow for plug-and-play operation on most supported operating systems (Windows, MacOS, Linux, Android). The necessary Virtual COM Port (VCP) drivers are often installed automatically when the device is first connected.

• Windows: Connect the device. Windows Update should automatically find and install the drivers. If not, you can manually download the latest FTDI VCP drivers from the official FTDI website (www.ftdichip.com/Drivers/VCP.htm).
• MacOS: Drivers are generally built-in or automatically installed. If issues arise, refer to the FTDI website for specific MacOS driver instructions.
• Linux: Most modern Linux distributions include FTDI VCP drivers in their kernel. No manual installation is typically required.
• Android: Requires an OTG (On-The-Go) compatible device and an application that supports serial communication. Drivers are usually handled by the Android OS.

4.2 Physical Connection

1. Connect the USB-A male connector of the adapter to an available USB 2.0 port on your computer or host device.
2. Observe the Power LED indicator on the adapter. It should illuminate, indicating the device is receiving power.

4.3 Wiring the 5-Pin Terminal Block

The converter features a clearly labeled 5-pin screw terminal block for connecting your RS232 or RS485 devices. The pitch of the terminal block is 3.81mm.

Figure 3: Clearly labeled 5-Pin Screw Terminal Block.

Refer to the pin assignments below for correct wiring:

• A+ (RS485 Data+): Connect to the Data+ line of your RS485 device.
• B- (RS485 Data-): Connect to the Data- line of your RS485 device.
• GND (Ground): Common ground for both RS232 and RS485 communication.
• TX (RS232 Transmit Data): Connect to the RX (Receive Data) pin of your RS232 device.
• RX (RS232 Receive Data): Connect to the TX (Transmit Data) pin of your RS232 device.

Ensure all connections are secure to prevent intermittent communication.

5. Operating Instructions

5.1 Identifying the COM Port

After connecting the converter and installing drivers, your operating system will assign a Virtual COM Port (VCP) number to the device. You can find this in:

• Windows: Device Manager > Ports (COM & LPT). Look for "USB Serial Port (COMX)".
• MacOS: System Information > Hardware > USB. The device will appear as a USB Serial Converter. The port will typically be `/dev/cu.usbserial-XXXX`.
• Linux: Use `ls /dev/ttyUSB*` in the terminal. The device will appear as `/dev/ttyUSB0` (or similar).

5.2 Software Configuration

Use your preferred serial communication software (e.g., PuTTY, RealTerm, minicom, custom applications) to configure the COM port settings to match your connected serial device:

• COM Port Number: Select the VCP number identified in Section 5.1.
• Baud Rate: Common rates include 9600, 19200, 38400, 57600, 115200 bps.
• Data Bits: Typically 8.
• Parity: None, Even, Odd.
• Stop Bits: Typically 1.
• Flow Control: None, Hardware (RTS/CTS), Software (XON/XOFF).

5.3 LED Indicators

The converter is equipped with LED indicators to monitor communication status:

Figure 4: TXD, RXD, and Power LED Indicators.

• Power LED: Illuminates when the device is powered via the USB port.
• TXD LED (Transmit Data): Flashes when data is being sent from your computer through the converter.
• RXD LED (Receive Data): Flashes when data is being received by the converter from the connected serial device.

6. Maintenance

To ensure the longevity and optimal performance of your Plinkwirekb serial converter, follow these maintenance guidelines:

• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Cleaning: Use a soft, dry cloth to clean the exterior of the device. Avoid using liquid cleaners or solvents.
• Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts.
• Connections: Periodically check the terminal block screw connections to ensure they are secure.

7. Troubleshooting

If you encounter issues with your serial converter, refer to the following troubleshooting steps:

• Device Not Detected:
  • Ensure the USB connector is fully inserted into the USB port.
  • Try connecting the converter to a different USB port on your computer.
  • Verify that the necessary FTDI drivers are installed correctly (refer to Section 4.1).
  • Check if the Power LED illuminates when connected.
• No Data Transmission/Reception:
  • Confirm that the terminal block wiring (A+/B- for RS485, TX/RX for RS232, and GND) is correct and secure.
  • Verify that the COM port settings (baud rate, data bits, parity, stop bits, flow control) in your serial communication software match those of your connected device.
  • Check the TXD and RXD LEDs. If they are not flashing during expected communication, there might be an issue with the software configuration or the connected device.
  • Ensure the connected serial device is powered on and functioning correctly.
• Intermittent Connection:
  • Inspect all cables and connections for looseness or damage.
  • Avoid using excessively long or low-quality USB extension cables.
  • Ensure there is no electromagnetic interference from other devices.

8. Warranty and Support

8.1 Warranty Information

If there is any problem with the product, you can contact us at any time for a replacement.

8.2 Customer Support

For further assistance, technical inquiries, or custom cable requirements, please contact the manufacturer or your point of purchase. Provide your model number (PCM-FDZ-485 232-L) and a detailed description of the issue for efficient support.