How can I carry out a test with 2 connections if the electrical power of the bus terminal cannot be taken over by any other device?
According to PROFIBUS standards, every device at the segment end has to be able to provide voltage to the connected and switched terminal resistor and thus generate an active bus terminal. In order to carry out this test with the PROFtest II in the measuring step "Test with 2 connections", there should, in the most simple case, be measuring points (connector with PG socket) available to connect the measuring adapter. In case the end device is a master, then the bus separator included in the scope of supply needs to be interconnected. If the end device itself is not capable of supplying voltage to the terminal resistor, then an additional bus terminal and simultaneously a measuring point should be installed after it.