3m DB9 RS232 Null Modem Serial Cable
Connect two compatible DTE serial devices over 3m with a DB9 male-to-female null modem crossover cable, shielded construction and secure thumbscrews.

Key features
Null modem crossover wiring
Designed for direct RS232 communication between two compatible DTE devices without a modem or other DCE device.
3m connection reach
Provides flexible positioning for compatible serial equipment at distances up to 3 metres.
Shielded construction
28AWG conductors, aluminium-Mylar foil and metal-shell connectors help reduce electromagnetic interference.
Secure DB9 connectors
Integrated thumbscrews reduce accidental disconnection, while moulded strain relief protects the cable ends.
What to know
Use for the correct serial topology
This is a null modem crossover cable for compatible DTE-to-DTE links; it is not a straight-through serial extension cable.
Built for dependable serial control
Suitable for compatible computers, controllers, terminals and other RS232 equipment requiring DB9 male-to-female null modem wiring.
Australian version with official StarTech.com warranty
Lifetime manufacturer warranty
This is the Australian version supplied by DeviceDeal and is covered by an official StarTech.com lifetime manufacturer warranty in Australia. Keep your DeviceDeal invoice as proof of purchase. Warranty coverage and claims are subject to StarTech.com warranty terms, eligibility and product assessment.
StarTech 9FMNM-3M-RS232-CABLE FAQ
What is the StarTech 9FMNM-3M-RS232-CABLE?
It is a DB9 male-to-female RS232 null modem crossover cable: Connect two compatible DTE serial devices over 3m with a DB9 male-to-female null modem crossover cable, shielded construction and secure thumbscrews.
What are the main features of 9FMNM-3M-RS232-CABLE?
Null modem crossover wiring: Designed for direct RS232 communication between two compatible DTE devices without a modem or other DCE device. 3m connection reach: Provides flexible positioning for compatible serial equipment at distances up to 3 metres. Shielded construction: 28AWG conductors, aluminium-Mylar foil and metal-shell connectors help reduce electromagnetic interference.
What must I check before buying 9FMNM-3M-RS232-CABLE?
Check the device manuals for DB9 gender, pinout and null modem compatibility. This crossover cable is intended for DTE-to-DTE use and is not wired straight through.
What is included with 9FMNM-3M-RS232-CABLE?
1 x null modem serial cable, female to male
Does 9FMNM-3M-RS232-CABLE require compatible equipment?
Yes. Connector type, interface standard, system support and the complete installation must match the product requirements shown in the specifications.
Is 9FMNM-3M-RS232-CABLE the Australian version?
Yes. DeviceDeal supplies the Australian version, backed by the official StarTech.com lifetime manufacturer warranty in Australia.
Do I need to keep my DeviceDeal invoice?
Yes. Keep the DeviceDeal tax invoice as proof of purchase if manufacturer warranty support is required.
What warranty covers 9FMNM-3M-RS232-CABLE?
9FMNM-3M-RS232-CABLE carries an official StarTech.com lifetime manufacturer warranty in Australia, subject to StarTech.com terms, eligibility and product assessment.




