DB9 Serial Extension Cable Male to Female RS-232 COM Port 9-Pin Various Lengths

DB9 Serial Extension Cable Male to Female RS-232 COM Port 9-Pin Various Lengths

This is a generic DB9 male to female serial extension cable for RS-232 / COM port connections. It features a standard 9-pin DE-9 male connector on one end and a 9-pin DE-9 female socket on the other, allowing you to extend an existing serial cable run or reach a device that is positioned away from the host port. Cables come in various lengths and colors — the photos show a representative example, and the unit you receive may vary in length or color.

Specifications & What's Included

• Connector A: DB9 (DE-9) Male — 9-pin plug with thumbscrew retention hardware
• Connector B: DB9 (DE-9) Female — 9-pin socket with thumbscrew retention hardware
• Interface: RS-232 serial / COM port
• Pin count: 9
• Cable length: Various (photo is representative)
• Cable color: Various (photo is representative)
• Brand: Unbranded / generic

Applications

DB9 RS-232 serial extension cables are used to lengthen an existing serial connection between a computer COM port and a peripheral device such as a modem, label printer, barcode scanner, PLC, CNC machine, GPS receiver, or industrial controller. The DB9 (DE-9) connector became the dominant serial interface on IBM-compatible PCs starting in the mid-1980s and remained the standard COM port form factor through the 1990s and into the 2000s before USB largely replaced it in consumer hardware. Serial ports remain common today in industrial automation, point-of-sale systems, networking equipment, and scientific instruments, so DB9 extension cables continue to see regular use in both legacy and current deployments.