Test Access Point


The measuring system for real-time Ethernet Bus Systems

With the KUNBUS-TAP Ethernet Data Sniffer, KUNBUS offers you a network monitor for the analysis of all common Industrial Ethernet solutions. With four sample ports, this device enables monitoring of up to two independent real-time Ethernet connections. With this, an internal throughput delay of 0 μs (zero delay) makes the KUNBUS-TAP Data Sniffer almost transparent for the data channels to be tested.

Connection of the Data Sniffer to a PC is made via a standard gigabit Ethernet interface. Reading and evaluation of the tapped packet data is done with freely available network monitors, like for example “Wireshark”.



Fields of Application

  • Test Access Point (Ethernet)
  • Analysis of CRC errors
  • Comparison of in and out frames
  • Measuring of jitter and delay


  • Measuring system for real-time Ethernet bus systems
  • Number of Ethernet ports 4 + 1 (monitoring of 2 lines)
  • Uplink port: - 1 Gbps 1000BASE-T Ethernet - RJ45 socket
  • Sampling ports: - 100 Mbps 100BASE-TX Ethernet - RJ45 socket
  • Throughput delay ~0 µs (zero delay)
  • Resolution time stamp 1 ns
  • Diagnosis: 3 LEDs
  • Full duplex operation
  • Unfiltered transmission of CRC errors

General Data

  • Supply voltage 12 to 30 V DC or 230 V AC plug power pack
  • Weight ca. 150 g
  • Dimensions (W x H x D) ca. 100 mm x 150 mm x 40 mm
  • Rubberized for impact protection
  • Foldable pivot foot
  • Allowable ambient temperature range during operation 0 °C ... + 55 °C
  • Allowable ambient temperature for storage -25 °C ... + 85 °C
  • Allowable relative humidity 95 %, no condensation
  • EMC-tested
  • Protection type IP 20
  • CE certification