Connecting The Mpi/Dp Interface - Siemens SIMATIC Box PC 820 Manual

1.4

Connecting the MPI/DP Interface

Connecting a PROFIBUS-DP Network via MPI/DP Interface
You can connect your IPC to PROFIBUS-DP networks via the optically isolated *)
MPI/DP interface. The connection is established via SINEC L2 components for
stationary links or via an MPI connecting cable with a length of 5 meters for non-
stationary links (order no.: 6ES7001-0BF00-0AA0). SINEC L2 components and
MPI connecting cables are not included with the IPC and have to be ordered sepa-
rately. The MPI connecting cable (5m) can only be employed for data transfer rates
up to 187.5 Kbps.
To connect your IPC to a PROFIBUS-DP network, proceed as follows:
1. Switch off your IPC.
2. Plug the connecting cable (of the SINEC L2 components or the MPI connecting
cable) into the MPI/DP socket connector of your IPC and tighten the connector
by means of screw-type locking.
3. Switch on your IPC.
Caution
!
Risk of damage to the unit!
Before plugging in the connecting cables, you must discharge the electrostatic
charge of the cables and of your body by briefly touching a grounded object (ESD
guideline).
PROFIBUS-DP Network
You can network up to 32 devices (PC, PG, PLC or DP components) via the MPI/
DP interface in one segment. The interconnection to the PROFIBUS-DP segments
is established via an optically isolated *) RS 458 port, which is part of the interface.
Interconnect several PROFIBUS-DP segments via a repeater.
The entire PROFIBUS-DP network has a maximum capacity of 127 stations. The
data transfer rate of the MPI network is 187.5 Kbps. The data transfer rate that can
be achieved via MPI/DP interface in the PROFIBUS-DP network ranges from
9.6 Kbps up to 12 Mbps.
Note
For further information on configuring a PROFIBUS-DP network please refer to
the "S7-300 Hardware Manual.
*) Optically isolated within SELV circuit
Siemens Distributor
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
System Unit
1-29