Pilz PSSu H PLC1 FS DP SN SD - Manual (Page 19)

Interfaces
Operating Manual PSSu H PLC1 FS DP SN SD
1001776­EN­04 19
INFORMATION
The two data lines are also called A and B on PROFIBUS.
Always connect the A­line ("RxD/TxD­N") to the A­lines of all the other
PROFIBUS subscribers.
The B­line ("RxD/TxD­P") should only be connected to the B­lines of the
other PROFIBUS subscribers.
If communication is not established, check the connections using a continu­
ity tester.
} Connect the connector housing to the shielding on the PROFIBUS cable. The con­
nector housing should be connected with low impedance to the mounting rail.
CAUTION!
Do not use the signals VP (+5 V ext.) and DGND (GND ext.) to supply
voltage to external devices! They are exclusively used to supply the
PROFIBUS DP bus terminating resistors.