Serial Tap ProSerial TapI2C/SPI TapEthernet Tap

IO Ninja Serial Tap Pro

Serial Tap Pro is a high-performance, electrically isolated serial sniffer for RS232, RS485, and TTL UART diagnostics. It supports baud rates up to 2.5 Mbps, 9-bit UART communication, and delivers microsecond-precision hardware timestamps. With virtually byte-perfect sequencing and support for real-time monitoring and packet injection, it's ideal for fault simulation, timing analysis, and debugging complex serial systems.

The device features galvanic isolation on all serial inputs, protecting both the host and connected devices from ground loops and voltage spikes. This makes it especially suited for industrial environments with noisy or unstable power conditions.

Serial Tap Pro also includes advanced features like RS485 data direction detection, hardware-level passthrough for RS232 wedge monitoring, and a convenient quick-release terminal block. Its FPGA-based architecture ensures accurate traffic forwarding and event capture, making it a complete tool for developers who need reliable and detailed serial communication analysis.

Key Features

  • Designed for use with IO Ninja software (http://ioninja.com/).
  • USB-powered, no external power adapter required
  • Three operating modes: RS232, RS485, and TTL-level UART
  • Quick-release terminal block for easy wiring of TTL/RS485 signals
  • Monitoring of all serial lines: TX, RX, RTS, CTS, DTR, DSR, DCD and RI
  • Onboard line status LEDs for immediate visual feedback
  • "Wedge" monitoring of RS232 communications:
    • DB9 connectors for placing the Tap "between" RS232 devices
    • Jumpers for swapping and loopbacking RS232 signals within TX/RX, RTS/CTS, and DTR/DSR signal pairs
    • Bi-color LEDs for distinguishing between positive, negative, and zero voltage levels on RS232 lines
  • Real-time data streaming to IO Ninja software for live capture and analysis
  • Electrically isolated serial interfaces (galvanic isolation)
  • High-speed data support (up to 2.5 Mbps)
  • Microsecond-precision hardware timestamps
  • Support for 9-bit UART frames
  • RS485 data direction detection (D1D2 forwarding)
  • Packet injection (line driving) capabilities

Documentation

Hardware Manual (HTML)IO Ninja Hardware Manual in HTML format.

Order the Serial Tap Pro

Purchase this product from the IO Ninja web site*.

* Ioninja.com is owned and operated by Tibbo Technology Inc.

Serial Tap ProSerial TapI2C/SPI TapEthernet Tap