Xylem 205547 Profibus Communication Modules - Manual (Page 16)

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
Lo op o ut
L oo p In
N C
S h i e l d
B t
B
A
A
t
B
A
Shield
GND
Lo
op
o
ut
L
oo
p
In
NC
Shield
Bt
B
A
At
At
Bt
Communication Modules