User guide

2.6 Connection Examples
2.6.1 One Connected Unit
This example illustrates connection, termination and ID confi guration of a
single unit with a communication module and a PLC.
ID settings
205547 Profi bus Default ID = 99
Termination
Profi bus communication requires bus termination. If the PLC is terminated,
Unit #3 requires Connection between A to At, and B to Bt
If, on the other hand, the PLC is NOT terminated, Unit #1 must also have
Connection between A to At, and B to Bt
B
GND
A
PLC
B
A
S
h
i
e
l
d
G
N
D
Loop out Loop In
N
C
S
h
i
e
l
d
B
t
B
A
A
t
B
A
Shield
GND
Loop out Loop In
NC
Shield
Bt
B
A
At
At
Bt
Connection between A to At, and B to Bt
Communication Modules