1. Pengenalan
The Gearmo 4 Port USB to Serial RS232 Adapter is designed to connect multiple legacy DB-9 serial devices to modern USB-equipped computers. This adapter utilizes a high-performance FTDI chipset, ensuring reliable data transfer and broad operating system compatibility. It is suitable for various applications, including POS systems, barcode scanners, industrial controls, and digital signage.

Gambar 1: Lebihview of the Gearmo 4 Port USB to Serial RS232 Adapter.
2. Ciri-ciri Utama
- 4-Port RS232 Connectivity: Easily adds four standard serial ports to your desktop or laptop.
- FTDI Chipset: Utilizes a high-performance FTDI chipset for stable and reliable communication.
- ESD and Surge Protection: Built-in protection against static electricity and surges up to 15kV ensures reliable data transfers and protects connected equipment.
- Pemasangan Plug-and-Play: USB interface allows for easy installation without requiring IRQ, DMA, or I/O port resources.
- COM Port Retention: Automatically re-assigns the same COM port value if the adapter is disconnected and reconnected to the host computer.
- Keserasian OS Luas: Supports Windows 7, 8, 10, 11, Linux, and macOS 10.X.
- Penunjuk LED: Power (PWR), Receive Data (RXD), and Transmit Data (TXD) LEDs for activity monitoring.

Figure 2: Detail of the four DB9 serial connectors.

Figure 3: The adapter's central unit, highlighting its data communication and protection features.
3. Senario Penggunaan
This adapter is ideal for connecting a wide range of serial devices to modern computer systems. Common applications include:
- Pencetak
- Pengimbas
- Modem
- Mesin CNC
- Pengawal PLC
- Kamera Digital
- GPS and PDA Devices
- Other legacy serial equipment with DB9 female connectors

Gambar 4: Cthamples of serial devices compatible with the adapter.
4. Persediaan dan Pemasangan
4.1 Menyambungkan Penyesuai
- Connect the DB9 male connectors of the Gearmo adapter to the DB9 female serial ports on your peripheral devices.
- Plug the USB Type-A connector of the adapter into an available USB port on your computer (desktop, laptop, or other mobile device).

Figure 5: Connecting the USB adapter to a computer.

Figure 6: The adapter fully connected to a laptop, ready for use.
4.2 Pemasangan Pemandu
The Gearmo USA-FTDI4X adapter is designed for plug-and-play operation on most modern operating systems (Windows 7, 8, 10, 11, Linux, macOS 10.X). In most cases, drivers will install automatically upon connection.
If automatic installation does not occur or if you are using an older operating system, a driver disc is included with the product. You may also download the latest drivers from the official Gearmo webtapak.
Video 1: An official product video demonstrating the features and connectivity of the 4-Port USB 2.0 RS-232 FTDI Serial Adapter.
5. Arahan Operasi
5.1 COM Port Retention
The adapter features COM port retention, meaning that once a COM port is assigned to a serial device, it will retain that assignment even if the adapter is disconnected and reconnected, or if the computer is restarted. This ensures consistent configuration for your serial applications.
5.2 Penunjuk LED
The central hub of the adapter includes LED indicators to monitor activity:
- PWR (Kuasa): Indicates that the adapter is receiving power from the USB port.
- RXD (Receive Data): Flashes when data is being received by the adapter from a connected serial device.
- TXD (Transmit Data): Flashes when data is being transmitted by the adapter to a connected serial device.
These LEDs allow for easy monitoring of data flow and can assist in troubleshooting connection issues.
6. Spesifikasi
| Ciri | Perincian |
|---|---|
| Nombor Model | USA-FTDI4X |
| Jenis Penyambung | USB Type A (Host), DB9 Male w/ Screws (Device) |
| Bilangan Pelabuhan | 4 x RS232 Serial |
| Chipset | FTDI (FT4232) |
| Panjang Kabel | 3 feet (approx. 0.91 meters) for each serial cable, 1 foot (approx. 0.3 meters) for USB cable |
| Kadar Baud | Up to 921.600 Bps |
| Penampan Data | Dual 16-byte hardware data buffer (up/down stream) |
| Sokongan OS | Windows 7, 8, 10, 11, Linux, macOS 10.X (also older Windows versions) |
| Perlindungan | ESD and Surge Protection up to 15kV |
| Sumber Kuasa | USB Powered (no external power required) |
| Dimensi Produk | 36 x 1.5 x 0.5 inci (lebih kurang 91.4 x 3.8 x 1.3 cm) |
| Berat Barang | 6.2 auns (lebih kurang 175.8 gram) |
6.1 RS-232 Pin-Out Diagram

Figure 7: Standard RS-232 DB9 Pin-Out.
7. Penyelenggaraan
To ensure the longevity and optimal performance of your Gearmo USB to Serial Adapter, follow these general maintenance guidelines:
- Keep the adapter and cables clean and free from dust. Use a soft, dry cloth for cleaning.
- Elakkan mendedahkan penyesuai kepada suhu, kelembapan atau cahaya matahari langsung yang melampau.
- Do not bend or crimp the cables excessively, as this can damage internal wiring.
- Simpan penyesuai di tempat yang selamat apabila tidak digunakan untuk mengelakkan kerosakan fizikal.
8. Penyelesaian masalah
If you encounter issues with your Gearmo USB to Serial Adapter, consider the following troubleshooting steps:
- Tiada Peranti Dikesan: Ensure the USB connector is fully inserted into your computer's USB port. Try a different USB port or a different computer to rule out port issues.
- Isu Pemandu: Verify that the correct drivers are installed. Check your operating system's Device Manager (Windows) or System Information (macOS/Linux) for the adapter and its driver status. Reinstall drivers if necessary.
- Ralat Komunikasi: Check all serial cable connections to your peripheral devices. Ensure the baud rate and other serial port settings in your application match those of the connected device. Monitor the RXD and TXD LEDs on the adapter for data activity.
- COM Port Conflicts: While the adapter supports COM port retention, conflicts can sometimes arise with other virtual COM ports. In Device Manager, you can manually change the assigned COM port number if needed.
- Sambungan Terputus-putus: Ensure cables are not damaged and connections are secure. Avoid using excessively long USB extension cables, which can sometimes lead to signal degradation.
9. Maklumat Waranti
For detailed warranty information regarding your Gearmo 4 Port USB to Serial RS232 Adapter, please refer to the warranty card included with your product or visit the official Gearmo webtapak. Terma dan syarat jaminan mungkin berbeza.
10. Sokongan
Gearmo provides engineering support for its products. If you require technical assistance, CAD files, mechanical drawings, or datasheets for integration or project needs, please contact Gearmo customer support through their official webtapak atau maklumat hubungan yang diberikan bersama dokumentasi produk anda.
Untuk sumber tambahan dan kemas kini produk, lawati Gearmo Store on Amazon.