Profibus-Pa Connection - Siemens Simatic 6ES7 157-0AD81-0 A0 Series Manual

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:
DP/PA coupler Ex [i]
(6ES7 157-0AD81-0XA0)
DP/PA coupler
(6ES7 157-0AC80-0XA0)
Looping through of PROFIBUS-PA:
PA bus terminating switch
Position: OFF
ON
OFF
Data line P+ (loop through)
Data line P– (loop through)
Figure 4-9
DP/PA Link and Y Link Bus Couplings
A5E00193841-01 1
Data line P+
Data line P–
Bus cable (loop through)
Data line P+
Data line P–
PROFIBUS-PA connection
Wiring
Bus cable
Shield
Cable grip
and
shield support
Bus cable
Shield
Cable grip
and
shield support
4-13