PNMA 1G | PROFINET-Gigabit-Measuring Adapter

PNMA 1G - PROFINET Gigabit measuring point

The PROFINET gigabit measuring adapter (PNMA 1G) serves as an access point for feedback-free telegram recording in PROFINET networks and further ethernet-based networks under production conditions. A permanent installation of the measuring adapter PNMA 1G in the network connection between the automation device (SPC) and the first switch is recommended, because typically the greater part of the communication converges in this connection. Therefore two network sockets (network P1 and P2) are available at the unit.

To connect an analysis tool non-reactively (PN-INspektor® 1G or laptop) two monitor sockets are provided (monitor M1 and M2). Thus it is possible to monitor in parallel both communication directions. An analysis tool is connected to the monitor sockets by two network lines. To analyse and evaluate the measuring results, the telegrams from both communication directions can be superimposed in terms of time. Error telegrams are not rejected by the PNMA 1G but forwarded.

Note: The UOUT (24VDC) connection can be used for the power supply of additional analysis tools.

Comparison: Telegram recording during online mode

Recording by mirror port on the switch

• Advantages:
  • No additional hardware required (no PNMA 1G)


• Disadvantages:
  • Time-consuming setup of the mirror port on the switch
  • High load on the switch due to the mirror port
  • Packet loss at high data rates
  • Bidirectional mirror port urgently required
  • Faulty telegrams are not mirrored

Recording by PNMA 1G

• Advantages:
  • No vacant switch port required
  • No efforts on connecting a measuring tool
  • Unconditionally bidirecional up to 1G


• Disadvantages:
  • Additional hardware