InLine B-12225 Null Modem Serial Cable DB-9 Female to Female Beige 5 m

The InLine B-12225 null modem serial cable is a reliable solution designed for connecting serial devices and enabling seamless data communication. Featuring DB-9 female connectors on both ends and a generous length of 5 meters, this beige null modem cable provides the reach and flexibility needed for various professional and home office configurations. It is engineered to facilitate direct device-to-device communication without requiring a standard modem intermediary.

Crafted with attention to practical durability, the cable incorporates a robust 5.4 mm diameter and standard 28 AWG wire size. Each connector is equipped with integrated knurl-thumb screws to ensure a secure, stable connection that prevents accidental disconnection during critical data transfers. The neutral beige color allows it to blend unobtrusively into most office or industrial environments.

Advantages

This null modem serial cable offers dependable signal transmission for legacy hardware and specialized serial equipment. The extended 5-meter length allows for flexible placement of connected devices across larger workstations or equipment racks. The inclusion of knurl-thumb screws ensures that connections remain firmly fastened even in high-vibration or busy operational environments.

Suitable for

• Connecting legacy serial devices and industrial equipment
• Direct computer-to-computer data transfer setups
• Configuring network hardware, routers, and switches via console ports
• Extended reach installations in professional or home workspaces

When it may not be suitable

This cable is not designed for modern USB or HDMI connections and will not fit devices lacking a standard 9-pin serial port. It is specifically a null modem crossover cable, meaning it is not intended to function as a standard straight-through serial extension cable for connecting peripherals like external modems directly to a computer.

Key specifications

• Cable length: 5 m
• Connector type: DB-9 female to DB-9 female
• Cable diameter: 5.4 mm
• Wire gauge: 28 AWG
• Color: Beige
• Connector fastening: Encapsulated with knurl-thumb screws
• Pin assignment: Cross-wired null modem configuration (1-7+8, 2-3, 3-2, 4-6, 5-5, 6-4, 7+8-1, shield)

How to use

To use the null modem serial cable, ensure that both devices you intend to connect are powered off to prevent electrical surges. Align the DB-9 female connector with the serial port on the first device, gently push it in, and hand-tighten the thumb screws securely. Repeat the process for the second device at the opposite end of the cable. Once both ends are firmly secured, power on your equipment and initiate your serial communication software.

What to consider before purchase

• Verify that both of your target devices feature standard 9-pin DB-9 serial ports
• Confirm whether your specific application requires a null modem crossover configuration rather than a straight-through cable
• Measure the distance between your devices to ensure the 5-meter length is sufficient

Usage recommendations

For optimal performance, route the cable away from heavy power lines or electromagnetic interference sources to maintain signal integrity. Always secure the connectors using the integrated thumb screws to prevent physical strain on the ports, and store the cable loosely coiled when not in use to avoid internal wire damage.