Softing PROFIBUS Tester 5 - Chapter 3 Basics; Note When Testing a Live Bus; Connection Types; Adapter Cable

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PROFIBUS Tester 5 (BC-700-PB) - User Manual

Connection to PROFIBUS-DP

3.1 Basics

3.1.1 Note when testing a live bus

Test tool side effects

When you connect a test tool, side effects on the system under test are generally

unavoidable. If the PROFIBUS is already disturbed to a certain degree or if Simatic

Diagnostic Repeaters are used, the operation of the PROFIBUS might nevertheless be

affected occasionally. Observe the following connection notes.

3.1.2 Connection types

There are several ways to connect a bus station to a PROFIBUS network:

Using connectors

o D-sub connectors , most of which have an integrated terminating resistor and, optionally, an

additional service socket

o M12 connectors for environments requiring increased IP ratings

o Special vendor-specific hybrid connectors; they are used in combination with special cables to

supply power via the bus

Using terminals for direct connection

Due to the typical daisy-chain topology, the connection points of the bus stations are the only possible

points for connecting the test tool in most cases.

3.1.3 Adapter cable

The BC-700-PB is supplied with the D-sub adapter cable BC600-PB-CB-DSUB-2 Standard (light

connector). For testing on live systems the optional D-sub adapter cable BC-600-PB-CB-DSUB-2 is

recommended. An M12 adapter set is optionally available, see D-sub adapter cable for testing live

systems .

Only use original short cables

Use only the original short cables with special pin layout to connect the unit to a PROFIBUS

network. Do not cascade more than two D-sub connectors with service sockets at the same

time:

Figure 14: Unallowed cascading of D-sub connectors