Hardware and engineering
07/04 AWB2700-1428GB
16
PROFIBUS-DP module XC-NET-DP-M
General
The module provides the interface between the CPU module and
the PROFIBUS-DP bus, which is an industrial standard compliant
with EN 50170 Vol. 2.
Task
The module provides the master function for PROFIBUS-DP. It
organises and operates the data exchange between the user
program and the connected slaves. Up to 31 slaves can be
connected to one bus segment. Several bus segments can be
connected together using repeaters, enabling up to 125 slaves to
be connected.
The PROFIBUS-DP module can be plugged in between the power
supply module and the CPU module.
Project engineering
PROFIBUS-DP interface
Connect the module to the PROFIBUS-DP bus via the isolated
RS485 interface (9-pole SUB-D socket connector).
Power supply
The power supply module provides the 5 V supply to the modules
via the PC/104+ bus.
Start/Stop behaviour
Setting the OMS to the STOP position will cause all the outputs of
the remote devices to be set to 0.
An interruption in the DP segment causes the inputs (receive data)
of the disconnected devices to be interpreted as 0 signals by the
PLC, and the outputs that were set by the PLC in the output
module will be reset.
Devices that are still connected to the PLC will continue to be
interrogated.
h
Use the special PROFIBUS-DP connector ZB4-209-DS2. It
provides the wiring required for trouble-free operation up
to 12 Mbit/s.
Figure 16 : Connections of the PROFIBUS-DP module
Figure 17 : Pin assignment of the PROFIBUS-DP interface
Pin
Designation
Meaning
3
RxD/TxD-P
Transmit/receive line, positive
5
DGND
Data Ground
6
VP
Supply v5 V
8
RxD/TxD-N
Transmit/receive line, negative
h
Set up the system power supply so that the connected
remote stations on the PROFIBUS-DP segment are
switched on simultaneously or before the controller. This
prevents any errors occurring during the starting of the
PROFIBUS-DP segment.
6
7
8
9
2
3
4
5
1
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