StarTech 3ft 1m DB9 to 3.5mm Serial Cable for Serial Device Configuration RS232 DB9 Male to 3.5mm for Calibrating via Audio Jack

The StarTech 9M351MRS232CABLE is a 3ft (1m) RS-232 serial cable with a DB9 male connector and a 3.5mm plug, suited to users configuring compatible serial devices through an audio-jack connection.

Recommended For

• AV technicians calibrating or configuring TVs, projectors, or digital-signage displays that support RS-232 control through a 3.5mm jack.
• Installers or service staff connecting a computer’s DB9 serial port to a compatible display’s 3.5mm RS-232 control jack for on-site setup or calibration.
• IT or AV teams that need a short, dedicated cable for repeat service work on compatible displays, with screw locks to help keep the DB9 connection secured.
• Technicians using a computer with a DB9 serial port—or a separate USB-to-serial adapter—to control a compatible 3.5mm RS-232 display connection.

Real-World Use Scenarios

• A technician calibrating a projector connects a computer’s DB9 serial port to the projector’s 3.5mm RS-232 control jack, allowing supported calibration commands to be sent without relying on a network connection.
• During digital-signage setup, an installer uses the cable to configure or calibrate a display that accepts three-conductor RS-232 through a 3.5mm jack; it works only when the display’s port and pinout are compatible.
• A service technician adjusting a compatible TV connects its 3.5mm RS-232 control port to a computer’s DB9 serial connection to send supported configuration or calibration commands.
• When the technician’s computer lacks a built-in serial port, they can pair the cable with a compatible USB-A-to-DB9 or USB-C-to-DB9 serial adapter to communicate with supported displays.

Spec Summary