B&B Electronics BB2872 DB9 to DB25 Null Modem Serial Adapter

The B&B Electronics BB2872 is a DB9 Female to DB25 Male Null Modem Adapter designed for direct serial device-to-device communication without the need for a modem. This compact adapter is ideal for connecting two DTE devices using standard RS-232 serial interfaces, making it a go-to solution for industrial automation, legacy computer systems, and serial data communication setups.

Key Features:

• DB9 Female to DB25 Male connector configuration
• Null modem wiring — enables direct DTE-to-DTE serial connections
• Compact, inline adapter form factor for easy installation
• Compatible with RS-232 serial communication standards
• Durable construction suitable for industrial and commercial environments
• No external power required

The BB2872 is a reliable, plug-and-play solution for technicians and system integrators who need to establish serial null modem connections between devices with mismatched connector types. Its rugged build and straightforward design make it well-suited for both bench use and permanent installations.