Serial null modem cable Intos DB9 female–female, molded connectors, 5 m, beige

Intos serial null modem cable with DB9 female-to-female connectors and molded connector housings. The 5 m beige cable implements a null modem (crossover) wiring for RS-232 serial communication, enabling direct device-to-device data transfer between two D-sub 9-pin (DB9) devices without a modem. It is suitable for connecting legacy computers, industrial equipment, peripherals and devices that use standard serial COM ports; check the PIN assignment before use to ensure compatibility.

Advantages

The molded DB9 female housings provide reliable mechanical protection for connector contacts and reduce strain at the cable ends. The fixed null modem wiring simplifies point-to-point serial connections by swapping transmit and receive lines and routing control signals as required for direct communication. The 5 m length offers extended reach for bench, workshop or cabinet installations while the beige sheath is unobtrusive in many environments.

Suitable for

• Direct RS-232 connections between two computers or terminals
• Configuration and debugging of industrial devices with DB9 ports
• Legacy equipment and peripheral connections that require null modem wiring
• Connecting serial consoles, routers or switches with D-sub 9-pin interfaces

Key specifications

• Connector type: DB9 female to DB9 female
• Cable length: 5 m
• Wiring: null modem (crossover) RS-232 assignment
• Sheath colour: beige
• Connector housings: molded
• Intended interfaces: RS-232 serial (suitable for RS422/RS485 adapter use where applicable)

How to use

Connect each DB9 female end to the corresponding male D-sub 9-pin serial port on the two devices you wish to link. Ensure both devices are powered off or set to a safe state when making the physical connection. After attaching the cable, power the devices and configure serial port parameters (baud rate, parity, data bits, stop bits, and flow control) to matching values on both sides. Verify that the null modem pin assignment matches the expected wiring of the connected devices to avoid communication issues.

Usage recommendations

Inspect the connector pins and housings before use and avoid excessive bending near the molded ends. For installations in electrically noisy environments, keep the cable routed away from high-voltage lines and large motors. If connection problems occur, confirm pin assignment and serial settings, and consider using a serial loopback or terminal emulator to diagnose the link.