StarTech MXT1003MBK DB9 Serial Extension Cable — Male to Female, 3 Meter

Overview

The StarTech MXT1003MBK is a 3-meter (9.8 ft) DB9 serial extension cable designed to bridge the gap between RS-232 serial devices and their host controllers when the built-in cable simply doesn't reach. Whether you're extending a serial PTZ camera controller, a legacy access control panel, a POS terminal, or an industrial serial device, the MXT1003MBK gives you an additional 3 meters of reliable, shielded run without cutting into your existing cable infrastructure.

The cable terminates with a DB-9 male connector on one end and a DB-9 female connector on the other — a true extension configuration that plugs directly into your existing device cable and host port. No adapters, no soldering, no pinout remapping required for standard RS-232 serial setups.

If you're planning a broader serial device deployment, browse the full StarTech catalog for additional serial adapters, converters, and connectivity accessories. For integration into surveillance control systems, see the PTZ camera category where serial control is still common on legacy and mid-range units.

Key Features

• 3 Meter Extension Length (9.8 ft): Adds exactly 3 meters to your existing serial run — enough to relocate a controller cabinet, reposition a serial console, or clear a cable management obstacle without rerunning the entire drop. For most rack-to-device distances inside a single cabinet row or across adjacent racks, this hits the sweet spot.
• 28 AWG Wire Gauge: At 28 AWG, the conductors are appropriately sized for RS-232 signal levels over a short extension. Thinner than power cabling by design — RS-232 is a low-current signal interface, so 28 AWG keeps the cable flexible and manageable without sacrificing signal integrity at this length.
• Aluminum-Mylar Foil Shield with Drain Wire: The foil-plus-drain shield construction directly addresses the most common failure mode for serial cables in commercial environments — EMI pickup from nearby power runs, fluorescent lighting, or motor-driven equipment. The drain wire gives you a dedicated path to ground the shield at one end, reducing noise coupling that can cause serial framing errors or dropped commands on PTZ controllers and access panels.
• Nickel-Plated DB9 Connectors: Nickel plating resists oxidation better than bare copper contacts, which matters in environments with moderate humidity. The MXT1003MBK is rated to operate at 0–95% relative humidity — nickel plating supports that range without contact degradation over time.
• PVC Cable Jacket: The black PVC jacket handles the 20°C to 45°C (68°F to 131°F) operating temperature range and is rated for storage down to -20°C (-4°F). PVC is flexible at room temperature and holds up in the conduit and cable tray runs typical of commercial installations — not a plenum-rated jacket, so verify your local code requirements for in-wall or above-ceiling routing.
• Operating Humidity up to 95% (Non-Condensing): Suitable for server rooms, equipment closets, and light-industrial environments. If your serial devices are located in a high-humidity zone like a loading dock equipment room, this cable handles it — just keep connectors mated and avoid direct moisture contact, as DB9 shells are not sealed.
• Lifetime Warranty: StarTech backs the MXT1003MBK with a lifetime warranty, which is meaningful for a cable that may be routed through conduit or a cable tray where replacement would require pulling the entire run. It removes lifecycle cost risk from the equation.

Integration and Compatibility

The MXT1003MBK works with any device using a standard DB-9 RS-232 serial interface — including serial PTZ camera receivers, legacy DVR serial ports, access control panels with RS-232 configuration ports, industrial PLCs, barcode scanners with serial output, and console management ports on network switches and routers.

For security integrators managing mixed serial and IP environments, this cable pairs naturally with serial-to-USB adapters when the host system has migrated away from native DB9 ports. It also works upstream of RS-232 to RS-485 converters used in multi-drop PTZ control runs. If you're planning storage or recording infrastructure alongside your serial devices, the network video recorder category includes units with onboard serial ports for direct PTZ integration.

Note that the MXT1003MBK is a passive extension — it carries all 9 pins straight through without signal boosting or conversion. Total cable length including the extension should stay within RS-232 spec limits (typically 15 meters / 50 feet at standard baud rates, though lower capacitance cable can stretch this). For longer runs, consider an RS-232 signal booster or a fiber serial extender. For guidance on serial control architecture in video surveillance, review a camera selection guide that covers control interface options.

Frequently Asked Questions

Q: What connector types does the MXT1003MBK use on each end?

A: The MXT1003MBK has a DB-9 male (9-pin D-Sub) connector on one end and a DB-9 female connector on the other, making it a direct extension cable for existing DB9 serial device cables.

Q: Is the MXT1003MBK shielded against interference?

A: Yes. The cable uses an aluminum-Mylar foil shield with a drain wire, which provides EMI protection. This is particularly useful in environments with nearby power cables, fluorescent lighting, or motor-driven equipment that can induce noise on unshielded serial lines.

Q: What is the warranty on the MXT1003MBK?

A: StarTech provides a lifetime warranty on the MXT1003MBK.

Q: Can the MXT1003MBK be used for PTZ camera serial control?

A: Yes, provided your PTZ receiver or controller uses a DB9 RS-232 interface. The cable passes all 9 pins straight through without signal conversion, so it works as a direct extension for any standard RS-232 serial control connection.

Q: Is the MXT1003MBK plenum-rated for in-wall or above-ceiling installation?

A: The cable jacket is PVC, which is not a plenum rating. Verify your local building and fire codes before routing in air-handling spaces or inside walls. For plenum environments, a CMP-rated serial cable would be required.

Q: What operating temperature range does the MXT1003MBK support?

A: The cable is rated for operation between 20°C and 45°C (68°F to 131°F) and storage between -20°C and 80°C (-4°F to 176°F), covering standard commercial and light-industrial equipment room conditions.

Marty Allison

The MXT1003MBK comes up regularly in security integration work when a serial PTZ controller or access panel is mounted just out of reach of the device's native cable — the 3-meter extension is exactly the kind of low-drama fix that keeps a rack-to-device run clean without splicing or replacing the original cable. What makes this one worth specifying over a generic DB9 extension is the aluminum-Mylar foil shield with drain wire: in equipment rooms where RS-232 runs share conduit or tray with 120V power feeds, that shielding is the difference between a clean command stream and intermittent serial framing errors that are frustrating to diagnose.

Technical Highlights:

• Foil + Drain Shield: Aluminum-Mylar foil with drain wire provides a grounded EMI barrier — critical when RS-232 serial lines share infrastructure with AC power or motor circuits common in commercial buildings.
• 28 AWG Conductors: Appropriately sized for RS-232 signal levels; keeps the cable flexible for routing through tight conduit or under raised floors without the stiffness of heavier-gauge cable.
• Lifetime Warranty: StarTech's lifetime coverage on the MXT1003MBK removes replacement cost risk — meaningful when the cable is routed through conduit where a swap requires pulling the run.

Deployment Considerations:

• This is a passive, straight-through extension — all 9 pins carry through without signal regeneration. Keep total RS-232 cable length (original cable plus this extension) within approximately 15 meters at standard baud rates to avoid signal degradation; if you need more distance, add an RS-232 repeater or switch to a fiber serial extender.
• The PVC jacket is not plenum-rated — confirm local fire and building codes before routing above a drop ceiling or inside a wall cavity in a commercial occupancy.

The MXT1003MBK is the right cable for equipment room and rack environments where a serial controller is a fixed 2–3 meters short of its target device — particularly in legacy PTZ control setups and access control panel configurations where RS-232 console access is still the standard commissioning interface.