StarTech. com NM9MM DB9 RS232 Serial Null Modem Adapter - M/M - Converts Straight-Through Cable to Null Modem
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Product Features
Technical Overview
This serial null modem adapter operates as a passive device that reconfigures the pin assignments between two DB-9 male connectors. It effectively crosses the transmit and receive lines, along with necessary handshaking signals, to establish proper null modem communication between two DTE devices.
The adapter supports standard RS232 signaling voltages and is compatible with any equipment using DB-9 serial interfaces. Its design ensures compatibility with legacy systems while providing the connectivity needed for modern serial communication requirements.
This section brings together practical product details such as Adapter Type, Connector Type on First End, Connector on First End Details, Color Family, so buyers can judge configuration, deployment fit, and day-to-day suitability with less guesswork.
A strong technical summary explains how the product's interfaces, hardware profile, and operating characteristics work together in real deployment. Buyers often need this context to confirm compatibility with existing devices, expected performance in daily use, and whether installation will be straightforward for IT staff or end users.
Key Product Advantages
The NM9MM adapter delivers practical benefits for serial communication setups by eliminating the need for specialized crossover cables. Its null modem configuration enables direct connection between computers, industrial controllers, networking equipment, and other serial devices that would normally require a modem for communication.
These strengths make the product easier to deploy and manage in real environments, especially where reliability, usability, and day-to-day operational continuity matter. Notable benefits include Error-free transmission, High-speed compatibility, Direct device connection, Cost-effective solution.
For buyers comparing similar models, the strongest advantage is usually the balance between dependable day-to-day operation and a simpler rollout experience. That means less time spent troubleshooting fit, compatibility, or user adoption after installation, which is especially important for shared business environments and repeat purchasing decisions.
Deployment / Use Cases
This null modem adapter finds application in numerous scenarios where serial communication between two computing devices is required. It's particularly valuable in industrial control systems, legacy computer networking, point-of-sale equipment configuration, and telecommunications infrastructure where RS232 interfaces remain in use.
Common deployment scenarios include connecting two computers for file transfer or terminal emulation, linking industrial programmable logic controllers to configuration workstations, and establishing direct connections between networking equipment for console management. The adapter's simple plug-and-play operation makes it suitable for both temporary troubleshooting and permanent installation in rack-mounted systems or equipment cabinets.
This section brings together practical product details such as Adapter Type, Connector Type on First End, Connector on First End Details, Color Family, so buyers can judge configuration, deployment fit, and day-to-day suitability with less guesswork.
Highlights
- Converts straight-through serial cables to null modem configuration
- Features male DB-9 connectors on both ends for direct device connection
- Supports high-speed RS232 data transfer with reliable signal integrity
- Beige color matches standard computer and networking equipment
- Compliant with EU RoHS environmental standards
- Backed by 2-year lifetime warranty for long-term reliability
- Packaged individually for immediate deployment
- Cost-effective alternative to purchasing specialized crossover cables
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | NM9MM |
| Brand Name | StarTech.com |
| Product Name | Serial Null Modem Adapter - M/M |
| Packaged Quantity | 1 Each |
| Product Type | Data Transfer Adapter |
| Technical Information | |
| Adapter Type | Serial |
| Connector Type on First End | DB-9 Serial - Male |
| Connector on First End Details | 1 x 9-pin DB-9 Male |
| Connector Type on Second End | DB-9 Serial - Male |
| Connector on Second End Details | 1 x 9-pin DB-9 Male |
| Physical Characteristics | |
| Color Family | Beige |
| Product Color | Beige |
| Miscellaneous | |
| Country of Origin | China |
| Environmentally Friendly | Yes |
| Environmental Certification | EU RoHS |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) 2,Registration, Evaluation, Authorization and Restriction of Chemicals (REACH),Waste Electrical and Electronic Equipment Directive (WEEE) |
| Warranty | |
| Limited Warranty | 2 Year Lifetime |
FAQ
What does this null modem adapter do?
The StarTech.com NM9MM adapter converts a standard straight-through serial cable into a null modem configuration. This allows two DTE (Data Terminal Equipment) devices like computers or industrial controllers to communicate directly without requiring a modem or specialized crossover cable between them.
What type of connectors does this adapter have?
This adapter features DB-9 male connectors on both ends. Each connector has 9 pins arranged in the standard DB-9 configuration, making it compatible with any equipment using DB-9 serial ports for RS232 communication.
Is this adapter compatible with all RS232 equipment?
Yes, the adapter is compatible with any equipment using standard DB-9 RS232 interfaces. It supports the full RS232 signaling standard and works with computers, industrial controllers, networking gear, point-of-sale systems, and other devices that utilize DB-9 serial ports for data communication.
What color is the adapter housing?
The adapter features a beige housing that matches the aesthetic of standard computer and networking equipment. This neutral color ensures visual compatibility with most professional and industrial environments where the adapter will be deployed.
What environmental certifications does this product have?
The adapter complies with EU RoHS (Restriction of Hazardous Substances) standards, along with REACH and WEEE directives. These certifications ensure the product meets European environmental regulations regarding hazardous materials and electronic waste management.
What warranty coverage does StarTech.com provide for this adapter?
StarTech.com backs this null modem adapter with a 2-year lifetime warranty. This warranty provides coverage for defects in materials and workmanship, ensuring long-term reliability for professional deployments where consistent serial communication is essential.
What refresh rate or brightness details are available?
Display-oriented products are best judged through screen, connectivity, and installation specifications. Those facts help buyers confirm visual fit, mounting flexibility, and deployment suitability more clearly than generic summary text.
What input or connectivity options are listed?
Connectivity options include DB-9 Serial - Male, helping the product integrate into common office or home setups.
| Qty | Price | Available |
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