B+B SmartWorx MMNM9 Null Modem Adapter DB9 Male Male
The B+B SmartWorx MMNM9 null modem adapter enables direct serial communication between two DTE (Data Terminal Equipment) devices without requiring a modem. This DB9 male-to-male adapter crosses transmit and receive lines, making it ideal for legacy system integration, industrial equipment connectivity, and point-of-sale terminal connections. Perfect for IT professionals, system integrators, and facilities managers who need reliable serial device interconnection.
Key Features
- DB9 male-to-male connector configuration for direct device-to-device connection
- Null modem wiring crosses transmit (TX) and receive (RX) lines automatically
- Eliminates need for external modem in serial communication setups
- Supports legacy DTE equipment and modern serial-enabled devices
- Compact, durable design for industrial and commercial environments
- Plug-and-play installation with no configuration required
Technical Specifications
| Specification |
Details |
| Manufacturer |
B+B SmartWorx |
| Part Number |
MMNM9 |
| Connector Type |
DB9 Male to Male |
| Wiring Configuration |
Null Modem (TX/RX Crossed) |
| Device Compatibility |
DTE (Data Terminal Equipment) |
| Application |
Serial Device Communication |
Frequently Asked Questions
What is a null modem adapter used for?
A null modem adapter enables direct communication between two DTE devices by crossing transmit and receive lines, eliminating the need for a modem. The MMNM9 adapter is commonly used for connecting legacy serial equipment, industrial controllers, and point-of-sale systems.
How does DB9 male-to-male configuration work?
The DB9 male-to-male connector allows two serial devices with male DB9 ports to connect directly. The null modem wiring inside the adapter automatically crosses the signal lines, enabling proper two-way communication between DTE devices.
Is the B+B SmartWorx MMNM9 compatible with modern systems?
Yes, the MMNM9 null modem adapter works with any system featuring a DB9 serial port, including legacy equipment and modern devices with serial connectivity. It's ideal for industrial automation, medical devices, and specialized instrumentation.
Do I need drivers or configuration for this adapter?
No, the MMNM9 is a passive null modem adapter requiring no drivers or software configuration. Simply connect your DB9 male serial cables to each end and begin serial communication immediately.
