Siemens Simatic 6ES7 157-0AC80-0 A0 Series, Manual

Page: 55 / 182

Wiring
4-13
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Required tool
To connect PROFIBUS-PA, you require a 3 mm screwdriver.
We recommend that you use the PROFIBUS FastConnect tool to prepare the
cables and lines (see Appendix D).
Bus cable
Use the bus cable specified in Appendix D for PROFIBUS-PA.
PROFIBUS-PA connection
The 4-pin screw-type terminal for the PROFIBUS-PA connection is found at the top
of the DP/PA coupler under the right-hand front door. The connections have the
following functions:
Data line P+
Cable grip
and
shield support
Bus cable
Data line P–
DP/PA coupler Ex [i]
(6ES7 157-0AD81-0XA0)
Shield
Data line P+
Cable grip
and
shield support
Bus cable
Data line P–
DP/PA coupler
(6ES7 157-0AC80-0XA0)
Shield
Data line P+ (loop through)
Data line P– (loop through)
Looping through of PROFIBUS-PA:
PA bus terminating switch
Position: OFF
OFF
ON
Bus cable (loop through)
Figure 4-9 PROFIBUS-PA connection