Serial Null Modem Cable InLine B-12226 9-pin female–female, 10 m

InLine B-12226 is a 10 m null modem serial cable with 9-pin female connectors on both ends, designed for direct RS-232 communication between two DTE devices. The cable crosses transmit and receive lines to enable point-to-point data transfer without a modem or DCE device. Its 10-metre length supports connections over longer distances while the standard 9-pin DE-9 female connectors ensure compatibility with equipment that uses traditional serial ports.

Advantages

The cable offers a fixed null modem wiring that removes the need for additional adapters or gender changers when connecting two computers, terminals, or other DTE devices. Durable construction and reliable shielding maintain signal integrity for serial communication over an extended length. The use of standard 9-pin female connectors simplifies installation and replacement in environments with legacy RS-232 hardware.

Suitable for

• Direct RS-232 data transfer between two computers or terminals
• Configuring and debugging network equipment and industrial controllers
• Connecting legacy devices such as printers, modems (in null-modem scenarios), and measurement instruments
• Serial console access for routers, switches and embedded systems

Key specifications

• Cable type: null modem serial cable (crossed TX/RX)
• Connector configuration: 9-pin female to 9-pin female
• Length: 10 m
• Interface standard: RS-232
• Construction: shielded conductors for reduced interference and improved signal stability
• Usage environment: designed for desktop, lab, industrial and field service applications

How to use

Connect each 9-pin female connector to the serial port of the two devices you wish to link. Ensure both devices are configured to use compatible RS-232 settings (baud rate, parity, data bits, stop bits and flow control) for successful communication. The built-in null modem wiring handles the necessary transmit/receive cross-over so no external adapter is required. Route the cable to avoid sharp bends and sources of strong electromagnetic interference to preserve signal quality over the 10 m run.

Recommendations

For best results, verify port settings and perform a loopback or simple terminal test before deploying the cable in a permanent installation. In high-interference environments use ferrite cores or additional shielding where possible, and avoid running the cable alongside high-voltage power lines.