Null Modem Cable Elgato NM9/9FF RS-232 9-pin male to 9-pin female

Elgato NM9/9FF is a null modem RS-232 cable featuring a 9-pin male connector on one end and a 9-pin female connector on the other. It is built to enable direct serial communication between two DTE devices by crossing transmit and receive signal lines, providing a straightforward wired link for PC-to-PC, equipment-to-equipment or console connections. The cable supports standard RS-232 signal assignments and is intended for use with legacy hardware, networking equipment consoles, industrial controllers and serial peripherals.

Advantages

The Elgato NM9/9FF null modem cable simplifies serial device interconnection without the need for external adapters or converters, reducing installation complexity. By providing a dedicated crossed wiring for RS-232 signals, it ensures correct TX/RX routing for terminal sessions, device configuration and data exchange. Its mixed 9-pin male-to-female format enables compatibility with a wide range of serial ports on PCs and equipment while maintaining the straightforward, point-to-point wiring required for many legacy and industrial systems.

Suitable for

• Direct PC-to-PC serial communication and file transfer over RS-232
• Connecting to router and switch console ports for configuration
• Linking industrial controllers, PLCs and serial diagnostic equipment
• Interfacing with serial peripherals such as modems, instrument panels, and older point-of-sale hardware

Key specifications

• Interface type: RS-232 null modem wiring
• Connector A: 9-pin D-sub male (DE-9)
• Connector B: 9-pin D-sub female (DE-9)
• Signal wiring: transmit and receive lines crossed for direct DTE-to-DTE connection
• Typical applications: console access, serial configuration, point-to-point data exchange

How to use

Plug the 9-pin male end into the serial port of one device and the 9-pin female end into the serial port of the other device, ensuring secure connections on both sides. Configure terminal software or device settings to match baud rate, parity, data bits and stop bits of the connected devices. Start a serial session or initiate the required data transfer or configuration commands; the null modem wiring handles the necessary TX/RX crossing so devices configured as DTE can communicate directly.

Usage recommendations

Verify serial port settings (baud rate, parity, data bits, stop bits, and flow control) before attempting communication. Use the cable for short to moderate-length connections within typical RS-232 distance limits, and avoid environments with strong electromagnetic interference; if longer runs or noisy environments are required, consider using shielded or differential serial solutions.