Chapter 6 - Connection to PROFIBUS
PROFIBUS Tester BC-700-PB - User Manual
31
6.5.2
Requirements for analyzing a live bus
When using the PROFIBUS Tester 5 and the BC-700-H1 adapter to carry out
measurements on an MBP segment during operation, it is preferable to connect the tool
via free bus connection terminals of the DP/PA fieldbus coupler. If the bus begins at the
coupler, you can simply use the second terminal block at the DP/PA coupler or at the SK1
or SK2 to sample the bus signal. If the couplers mentioned above are not located at the
beginning of the bus or if the bus begins with an SG3 coupler or if you are interested in the
PROFIBUS PA signal at another test location, we recommend connecting a short spur
cable to rail mounted terminals during system shutdown. This gives you an appropriate
connection point and makes future maintenance work much easier.
6.5.3
Analyzing during system shutdown
If there is no possibility for connection, you need to improvise in order to pick up the bus
signal at an existing terminal block of the fieldbus coupler, the field distributor, segment
protector or a field device. For example, you can try a double assignment of bus terminals.
Shut down the system before you divide the bus.
Disconnect all bus stations from the power supply.
6.5.4
Bus connection
The supplied test equipment set allows to easily connect the BC-700-H1 adapter to the
PROFIBUS PA segment. Alternatively you can use a short length of PROFIBUS PA
standard cable to connect the tool to the bus.
Figure 25: PROFIBUS-PA pin assigment
Do not use in hazardous areas
The PROFIBUS Tester 5 and BC-700-H1 adapter must not be used in
hazardous areas and must not be connected to an intrinsically safe MBP-IS
segment (blue terminals of fieldbus coupler; in some cases blue bus
cables).
