Description

Basis of the active measurement point PBMA

The PBMB can be complemented by a PB plug with a 9-pin D-subminiature connector on the back and thus becomes a PBMA.

Function

Non-interacting measuring points are required at every segment of a master system to determine the physical signal-to-noise ratio of PROFIBUS communication. Measuring points at the two ends of a segment help to provide the most optimal information on the physical transmission quality.

It is necessary to add a PROFIBUS connector (see Active measuring point PBMA) to the PBMB to connect a PROFIBUS line.

As type PBMA, it meets not only the requirements of a non-interacting measuring point but also fulfills the demand and function of an active bus termination. The Power LED signals the 24 V power supply required for the terminating resistor.

Diagnostic tools connect according to the PG/diagnosis interface of the PROFIBUS connector. An active programming cable, APKA or APKA II, is recommended for a non-interacting connection of a programming device (laptop/field PG).

The connection of functional earth is necessary for the functioning of the PROFIBUS shield!

Example of Use

Engineering Drawing