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Short white plastic cable with USB-A and DB9 male ends, LED near USB

IOGEAR

IOGEAR GUC232A 16" USB to DB9 RS-232 serial cable

SKU CH-7WCF-DBCKJ MPN GUC232A

Adds a serial port to a PC or Mac via USB, converting legacy RS-232 devices at up to 230 Kbps with a 16-inch cable

  • Rated speedUp to 230 kbit/s
  • Connector count2
  • Connector details1 x USB Male 1 x DB9 Male
  • Connector genderMale to Male
  • Product typeUSB to DB9 (RS-232)
  • Overall length16 in (40.6 cm)
  • Connect legacy serial gear via USB 1.1 or 2.0
  • 16-inch cable reaches nearby ports without strain
  • 230 Kbps throughput handles classic RS-232 devices
  • LED indicator confirms active data transfer instantly
  • Draws only 90 mA from the USB bus

USB to DB9 serial adapter

The IOGEAR GUC232A adds a DB9 RS-232 port to a PC or Mac through a standard USB Type-A plug. It lets you connect legacy serial equipment such as industrial controllers, networking gear or older PDAs without an onboard COM port. The 16-inch cable keeps the dongle close to the host port.

Maximum 230 Kbps data rate

The adapter supports serial speeds up to 230 Kbps, which covers most RS-232 console, telemetry and point-of-sale devices. Higher baud-rate equipment will not operate reliably through this link. The USB 1.1 and 2.0 interface supplies 90 mA to power the converter electronics.

Driver installation then plug in

Install the supplied driver for your operating system before attaching the cable. The DB9 male connector mates directly with a female RS-232 port; no gender changer is included. A built-in LED shows transmit and receive activity for quick link verification.

How it compares

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

Price $17.99
Cheaper than about 60% of the 93 comparable items (median $21.99).

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Specifications

Product
Brand nameIOGEAR
Model nameGUC232A
Product typeUSB to DB9 (RS-232)
Performance
Rated speedUp to 230 kbit/s
Ports & slots
Connector count2
Connector details1 x USB Male
1 x DB9 Male
Connector genderMale to Male
Size & build
Overall length16 in (40.6 cm)
Shipping weight0.13 kg
Package size160 × 124 × 23 mm

Questions about this item

How fast will the 230 Kbps serial rate actually run once the cable is plugged into a real machine?

The link negotiates at USB full-speed, so the 230 Kbps RS-232 ceiling is the practical throughput limit for any connected serial device.

What USB standard does the adapter use and what speed does that cap at?

The adapter is USB 1.1 and 2.0 compatible and operates at USB full-speed, which is sufficient for the 230 Kbps serial specification.

What physical space does the 16-inch cable and DB9 connector need to fit?

The 16-inch cable with a standard DB9 male plug requires enough clearance for the connector depth plus the short cable bend radius behind the port.

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