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Black 6 ft USB Type-A to DB-9 male serial adapter cable

STARTECH

STARTECH ICUSB422 6 ft USB to RS422/485 serial cable

SKU CH-CYWG-G3ZCZ MPN ICUSB422

Adds an RS-422 or RS-485 serial port via USB 1.1 with COM-port retention and a 6 ft cable

  • Connector count2
  • Connector details1 × 9-pin DB-9 Male RS-422 Serial 1 x Type A Female USB 1.1
  • Connector genderMale-to-Male
  • Conductor typeCopper
  • Product typeCable Connectors
  • Product colorBlack
  • Add an RS422 or RS485 serial port via USB with COM retention
  • 6 ft cable length provides flexible placement for industrial devices
  • USB 1.1 powered operation eliminates the need for an external power adapter
  • Supports data rates up to 921.6 Kbps for reliable serial communication
  • Wide operating range from 0 °C to 55 °C suits demanding environments

6 ft USB to RS422/485 serial adapter

The StarTech ICUSB422 adds a 9-pin DB-9 male RS-422/485 serial port to a computer through a USB 1.1 Type-A female connector. The 6 ft cable links industrial equipment such as scanners or controllers to modern systems lacking native serial ports. It is aimed at integrators and technicians who need reliable legacy connectivity.

USB powered with 0 to 55 °C operating range

The adapter draws power directly from the USB bus, so no external supply is required. It operates from 0 °C to 55 °C (32 °F to 131 °F) and stores safely down to -20 °C. Copper conductors and a black PVC jacket handle typical industrial environments without active cooling.

COM retention keeps port settings after reboot

The built-in COM port retention feature preserves the assigned port number and configuration across system restarts. This prevents the need to re-configure software each time the cable is reconnected. Maximum data rate reaches 921.6 Kbps for fast serial communication.

How it compares

Measured against everything we stock in RS-232 Serial Cables, at today’s prices. Recalculated every night.

Price $50.99
Pricier than about 81% of the 93 comparable items (median $21.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB422
Product typeCable Connectors
Product colorBlack
Ports & slots
Connector count2
Connector details1 × 9-pin DB-9 Male RS-422 Serial
1 x Type A Female USB 1.1 USB
Connector genderMale-to-Male
Size & build
Overall length6 ft (1.83 m)
Conductor typeCopper
Shipping weight0.20 kg
Package size210 × 144 × 42 mm

Questions about this item

How do I install the ICUSB422 cable and keep the COM port from changing after a reboot?

Plug the Type A USB 1.1 connector into the host, connect the 9-pin DB-9 male end to the RS-422 or RS-485 device, then install the driver so the assigned COM port is retained across restarts.

What part of the ICUSB422 is most likely to need replacement after extended use?

The 6 ft copper cable and the DB-9 or USB connectors can wear from repeated flexing or mating cycles, so inspect them periodically for damage.

At what baud rate does the ICUSB422 hit its maximum throughput limit during sustained transfers?

The adapter tops out at 921.6 Kbps, so continuous high-volume traffic will saturate at that rate.

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