ABB NPBA-12 - PROFIBUS Wiring Examples

Chapter 4 – Electrical Installation
4-4 NPBA-12 Installation and Start-up Guide
PROFIBUS Wiring
Examples
The PROFIBUS cable shield may be directly earthed at one station
only. At other stations the cable shield should be earthed via an
RC filter.
There are two wiring examples below for standard PROFIBUS cable
consisting of a twisted pair and screen.
Figure 4-3 Connection diagram for the standard PROFIBUS cable. Only connection (B) enables the
removal of the intermediate module without disturbing the bus.
A
B
PROFIBUS NPBA-12
X1
1234
MASTER
B
A
X1
ABAB
NPBA-12
1234
ABAB
5678
+24V
0V
DG
SH
5678
+24V
0V
DG
SH
GND
PROFIBUS NPBA-12
X1
1234
MASTER
B
A
X1
ABAB
NPBA-12
1234
ABAB
5678
+24V
0V
DG
SH
5678
+24V
0V
DG
SH
GND
X2 X2
X2 X2