Serial Port Adapter PREMIUMCORD R99FFKK 9F to 9F Short, DB9 female to DB9 female short adapter

The PREMIUMCORD R99FFKK 9F to 9F Short adapter is a compact DB9 female-to-female inline connector designed to join two RS‑232 DB9 cables or devices without electrical conversion. Its short form factor provides a secure mechanical connection between serial ports while keeping cable routing neat and minimizing signal path length. The adapter is intended for situations where a gender coupler or a brief extension is required to link modems, industrial controllers, legacy PCs and peripherals that use the standard 9‑pin serial interface.

Advantages

This short DB9 female-to-female adapter offers a simple, passive connection that preserves the original RS‑232 signal wiring and grounding. Its compact housing reduces stress on connected cables and ports, and the inline configuration makes it easy to install in confined spaces. The adapter provides a straightforward mechanical solution with minimal added length, which helps maintain reliable data communication for low-speed serial links.

Suitable for

• Connecting two DB9 RS‑232 cables to extend reach by a short distance
• Linking serial devices such as modems, barcode scanners, and industrial controllers
• Adapting gender to connect devices with female DB9 ports
• Temporary or permanent setups in constrained spaces where a short coupler is needed

Key specifications

• Connector type: DB9 female to DB9 female (9-pin)
• Interface standard: RS‑232 compatible
• Form factor: short inline/gender coupler
• Construction: passive mechanical adapter, no active electronics
• Typical use: cable coupling and gender conversion for serial connections

How to use

Insert one DB9 male connector from a cable or device into one end of the adapter and insert the other male DB9 connector into the opposite end. Ensure the screws or fastening thumbscrews on the connected connectors are tightened as required to secure the mechanical connection and prevent accidental disconnection. Because the adapter is passive and preserves pin-to-pin wiring, no configuration or power is required; the connected devices will communicate using their existing RS‑232 settings.

Usage recommendations

Use the adapter for short physical connections only; avoid relying on it to improve signal integrity over long distances. For critical or high‑speed serial applications, check cable shielding and connector integrity and consider using properly terminated extension cables or active signal repeaters where necessary.