InLine null modem cable DB9 female / female molded 3m

The InLine null modem cable DB9 female/female molded 3m connects two PCs, notebooks or servers via RS232 (COM) ports using a null modem wiring. It features molded Sub-D 9-pin (DB9) female connectors on both ends and a 3 meter length, designed for reliable serial data transmission and durable everyday use. Note: check the PIN assignment before installation.

Advantages

The molded DB9 female/female connectors provide mechanical stability and ease of handling. The cable supports adapting and connecting RS232, RS422, RS485 and similar serial interfaces where a null modem configuration is required. A standardized null modem pinout is applied to swap transmit/receive signals without additional adapters.

Suitable for

• Direct serial communication between two computers or terminals
• Connecting or adapting RS232 devices in laboratory or industrial setups
• Serial console access to routers, switches or servers with DB9 COM ports

Key specifications

• Connector type: Sub-D 9-pin (DB9) female to Sub-D 9-pin (DB9) female
• Pin assignment (null modem): 1↔7+8, 2↔3, 3↔2, 4↔6, 5↔5, 6↔4, 7+8↔1, shield↔shield
• Length: 3 m
• Sheath colour: beige
• Connector housing: die-cast

How to use

Connect each DB9 female connector to the corresponding male COM port on the devices to be linked. Verify that the device COM port settings (baud rate, parity, data bits, stop bits, and flow control) match on both ends. Confirm the null modem pin assignment is compatible with the equipment; if required, consult device manuals to ensure proper signal mapping before powering the devices.

Usage recommendations

For stable serial communication, keep cable runs short where possible, avoid routing near high-voltage or high-frequency sources, and secure connectors to prevent strain. If a different pinout is needed, use an appropriate adapter or cable variant.