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Compact USB to serial adapter with DB9 port and terminal block, status LEDs visible

MCHOSE

MCHOSE USB to Serial Adapter 1 Port RS-232/422/485

SKU CH-7AQF-9R39G

Converts USB to RS-232/422/485 serial at up to 921.6 kbps with 2 kV isolation and OS-wide driver support

  • Product typeUSB Hubs
  • 6 kbps maximum baudrate enables fast data transmission
  • Drivers provided for Windows macOS Linux and WinCE ensure broad OS compatibility
  • Virtual machine support for VMWare Fusion ESXi and Parallels simplifies deployment
  • Mini-DB9-female-to-terminal-block adapter allows easy wiring
  • 2 kV isolation protection on -I models safeguards connected equipment

USB to Serial Adapter RS-232/422/485

This USB converter provides a single DB9 port that supports RS-232, RS-422 and RS-485 protocols. It is designed for engineers and technicians who need to connect legacy serial equipment to modern computers lacking native COM ports.

Sustained data transmission at 921.6 kbps

The adapter maintains its maximum baud rate during continuous operation rather than only in short bursts. Drivers for Windows, macOS, Linux and WinCE ensure stable throughput across long sessions, and virtual-machine support for VMware Fusion, ESXi and Parallels keeps performance consistent in virtualised environments.

Isolation and wiring limits

Models with the -I suffix include 2 kV isolation protection to guard the host against ground loops and voltage spikes. The supplied Mini-DB9 female to terminal-block adapter simplifies field wiring, while activity LEDs for USB and TxD/RxD give immediate visual feedback on link status.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $165.99
Pricier than about 92% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Product typeUSB Hubs

Questions about this item

Does the adapter draw enough power to heat up during continuous 921.6 kbps operation?

The USB-powered design runs cool under normal load; 2 kV isolation on -I models adds protection without extra heat.

Which operating systems need a driver before the RS-232/422/485 port appears?

Windows, macOS, Linux and WinCE all require the supplied driver; VMWare Fusion, ESXi and Parallels are also supported.

Can I connect this adapter to a legacy DB9 serial device without rewiring?

The included mini-DB9-female-to-terminal-block adapter lets you wire legacy equipment directly.

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