15 ft DB9 Male to Female RS232 Extension Cable - Shielded Plenum

In this review the 15 ft DB9 Male to Female RS232 Extension Cable is judged as a practical, no-nonsense solution for extending legacy serial connections. It is aimed at IT technicians, AV installers, and facilities teams who need a reliable, in-wall rated extension for RS-232 links. The single biggest reason to buy is its combination of straight-through DB9 wiring with a UL-listed, Article 800 plenum jacket, which provides both continuity of signal and the safety required for plenum installations.

Key Features

• Male to Female DB9 connectors: Provides a simple extension for existing DB9 serial cables so peripherals and legacy equipment can be repositioned without rewiring.
• Extends RS-232 serial connections: All pins are wired straight through, preserving signal integrity for devices that rely on standard RS-232 pinouts.
• 22 AWG shielded conductor: Heavier 22 AWG conductors with full shielding reduce susceptibility to EMI and RFI in electrically noisy environments.
• Plenum-rated white jacket: The UL-listed, Article 800 plenum jacket permits installation in plenum spaces where building codes require low-smoke, fire-resistant wiring.
• Made in USA quality: Assembled by a small, experienced manufacturer, the cable emphasizes consistent workmanship and US-sourced components.

Who It's For

This cable is best for IT departments, AV integrators, and contractors who need to extend or reroute serial connections in offices, conference rooms, or commercial buildings where plenum-rated wiring is required. It is especially useful when a longer reach is needed without replacing the original device cables.

It is not intended for users who need modern USB-to-serial conversion, high-speed data links, or custom pin remapping; those users should consider dedicated converters or purpose-built cables. Also, if low-profile or ultra-flexible jacketing is required for tight routing, a different cable construction may be preferable.

Pros & Cons

Pros

• Straight-through DB9 wiring maintains expected RS-232 pinouts for compatibility with legacy equipment.
• The 22 AWG shielded core improves resistance to interference in commercial installations.
• UL-listed Article 800 plenum jacket allows safe routing in building airspaces where that rating is required.

Cons

• The cable is a standard RS-232 extension and does not provide signal conversion or level shifting for non-serial interfaces.

Specifications

Cable length	15 ft
Connector type	DB9 male to DB9 female
Conductor size	22 AWG
Shielding	Full aluminum/polyester shield
Jacket rating	UL-listed, Article 800 plenum
Wiring	All pins wired straight through (RS-232)
Origin	Made in USA

Our Verdict

The 15 ft DB9 Male to Female RS232 Extension Cable is a practical, well-built option for professionals who need to extend legacy serial connections while meeting plenum installation codes. Its combination of 22 AWG shielding and UL-listed plenum jacket makes it a sensible choice for commercial environments, providing good value when compliance and signal integrity matter more than conversion or advanced features.

Frequently Asked Questions

Is this cable suitable for plenum installation?
Yes. The cable carries a UL-listed Article 800 plenum jacket suitable for routing in plenum spaces.

Does the cable change RS-232 pinouts?
No. All pins are wired straight through, so the DB9 extension preserves standard RS-232 pin assignments.

Who manufactures this cable?
The cable is produced by a family-owned US manufacturer that assembles products using US-sourced components.