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Silver rectangular USB hub with four DB9 ports and LED status lights

GearMo

GearMo 4-Port RS232 USB Converter FTDI LED 15KV

SKU CH-YW40-4WGH6

Adds four RS-232 serial ports via USB with FTDI chipset, RX/TX LEDs, and 15KV surge protection for legacy device connectivity

  • Add four serial ports via a single USB connection
  • FTDI chipset ensures broad OS compatibility with Windows 10, 11, Linux and Mac OS 10.X
  • RX and TX LEDs give instant visual link status per port
  • 15 KV surge protection guards equipment from static and voltage spikes
  • Plug-and-play operation with COM-port retention needs no external power

Industrial Serial Connectivity

The GearMo 4-Port RS232 USB Converter adds four independent COM ports to any Windows 11, 10, 8, 7, Linux or macOS 10.x host using a proven FTDI chipset. It targets engineers and technicians who must keep legacy RS-232 instruments, PLCs or barcode scanners running on modern laptops or industrial PCs without internal serial headers.

Rugged Metal Enclosure

A sturdy metal housing survives bench vibration and rack mounting while the standard USB Type-A female upstream connector requires no external power supply. Each port provides its own RX and TX status LEDs for instant link verification, and the hardware automatically handles full RS-232 handshaking so existing software sees native COM ports with retention across reboots.

Protected Low-Power Operation

Built-in 15KV surge protection shields connected equipment from static discharge, high-voltage spikes and dangerous electrical shocks during field service. Dual 16-byte hardware buffers sustain baud rates up to 921.600bps with minimal host CPU load, and the adapter draws all required power directly from the USB bus, producing no audible noise and negligible thermal output.

Highlights

  • Add four serial ports via a single USB connection
  • FTDI chipset ensures broad OS compatibility with Windows 10, 11, Linux and Mac OS 10.X
  • RX and TX LEDs give instant visual link status per port
  • 15 KV surge protection guards equipment from static and voltage spikes
  • Plug-and-play operation with COM-port retention needs no external power

Specifications

No published specifications for this item yet.

Questions about this item

Does the USB Type A female interface limit the 921.600bps serial rate in practice?

The USB connection is full-speed, so the FTDI chip can sustain the full 921.600bps on all four ports without bottleneck.

What clearance does the adapter need behind the USB port for the four DB9 connectors?

Each DB9 male connector extends about 4 cm from the housing; allow at least 6 cm depth so cables do not strain the USB port.

How do I get Windows to keep the same COM numbers after a reboot?

Install the FTDI driver first, then plug the adapter in; the driver binds COM ports to the device serial number so they persist across reboots.

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