Profibus Interface; Pin Assignment - Profichip VPC3+C User Manual

9.1

Pin Assignment

The data transmission is performed in RS485 operating mode (i.e., physical
R S485). The VPC3+C is connected via the following signals to
galvanically isolated in
Signal Name
RTS
TXD
RXD
Figure 9-1: PROFIBUS Signals
The PROFIBUS interface is a 9-way, sub D, plug connector with the
following pin assignment.
Pin 1 - Free
Pin 2 - Free
Pin 3 - B line
Pin 4 - Request to send (RTS)
Pin 5 - Ground 5V (M 5 )
Pin 6 - Potential 5V (floating P5 )
Pin 7 - Free
Pin 8 - A line
Pin 9 - Free
The cable shield must be connected to the plug connector housing.
The free pins are described as optional in IEC 61158-2.
CAUTION:
The pin names A and B on the plug connector refer to the signal names in
the RS485 standard and not the pin names of driver ICs.
Keep the wires from driver to connector as short as possible.
VPC3+C User Manual
Copyright © profichip GmbH 2004-2006

PROFIBUS Interface

terface drivers.
Input/Output Function
Output Request to send
Output Sending data
Input Receiving data
Revision 1.03
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9 PROFIBUS Interface
the
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