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The DB9-TERS DB9 Serial Tester is a simple, plug-and-play tool that helps you troubleshoot and monitor RS-232 connections with ease. Equipped with dual-color LEDs, it provides a clear visual of data transmission and reception activity across all 9 pins with no power source required. Designed with both DB9 male and female connectors, this compact tester fits seamlessly between your RS-232 host and device, making it perfect for verifying DTE and DCE interfaces. It supports data rates up to 200Kbps and works across Windows, macOS, and Linux systems. Whether you're testing communication lines or checking pin activity, this tester keeps things easy and efficient.
Quickly test COM port function & verify RS-232 signal activity with dual-color LED indicators on each pin for easy troubleshooting.
The tester draws power directly from your USB port, so no extra power supply is needed for true plug & play convenience.
Easily monitor your connection with LED indicators which flash to signal the direction of data flow, allowing easy real-time monitoring.
Small adapter size is perfect for tight spaces and quick troubleshooting tasks in any setup.
Works seamlessly with Windows 7 through Windows 11, macOS, and Linux.
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