Profibus Interface; Wiring Instructions - ProSoft Technology ILX69-PBM User Manual

ILX69-PBM ♦ CompactLogix™ or MicroLogix™ Platform
PROFIBUS Master Communication Module
3.2

PROFIBUS Interface

PROFIBUS Interface (D-Sub female connector, 9 pin):
Connection with D-
Sub female connector
3
4
5
6
8

3.2.1 Wiring Instructions

Please ensure that termination resistors are available at both ends of the PROFIBUS
network cable. If special PROFIBUS connectors are being used, these resistors are
often found inside the connector and must be switched on at each end of the PROFIBUS
network cable.
For baud rates above 1.5 MBaud, use only special connectors for higher baud rates.
These include additional inductance.
It is not permitted to have T-stubs on PROFIBUS high baud rates. Use only a special
cable which is approved for PROFIBUS DP. Make a solid connection from the cable
shield to ground at every device and make sure that there is no potential difference
between the grounds at the devices.
ProSoft Technology, Inc.
Signal Description
RxD / TxD-P Receive/Send Data-P, respectively connection B plug
CNTR-P Repeater-Control
DGND Data Ground
VP Positive supply voltage
RxD / TxD-N Receive/Send Data-N, respectively connection A plug
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