Technical data

SIMATIC Box PC 620 Expansions
5-29
SIMATIC Box PC 620 Manual
C79000-G7076-C639-02
5.11 Network Connections and Internetworking
5.11.1 Connection of an MPI/DP Port
Connection of a PROFIBUS-DP Network via the MPI/DP Port
You can connect the PC to PROFIBUS-DP networks via the potentially isolated *)
MPI/DP port. The physical connection is effected via SINEC-L2 components for
stationary connections or via the 5m long MPI connecting cable (order no.:
6ES7001-0BF00-0AA0) for non stationary connections. SINEC-L2 components
and MPI connecting cables are not included in the scope of supply of the PC and
must be ordered separately. The MPI connecting cable (5m) can only be used for
transfer rates up to 187.5 kBaud.
Proceed as follows for connection to a PROFIBUS–DP network:
1. Switch your device off.
2. Insert the connecting lead (of SINEC-L2 components or MPI connecting cable)
into the MPI/DP socket of your PC and secure the connector by fastening the
screw locking.
3. Switch your PC on.
!
Caution
Risk of damage to the device!
Before inserting the connecting cables, the electrostatic charge in your body and
the connecting cables must discharged by briefly touching a grounded object
(ESD instruction).
PROFIBUS-DP Network
With the MPI/DP port, up to 32 devices (PC, PU, AS or DP components) can be
linked to one network segment. The physical interlinking to the PROFIBUS–DP
network is effected via a potentially isolated *) RS 458 interface, which is a
constituent part of the port.
Several PROFIBUS-DP network segments can be linked via repeaters.
The entire PROFIBUS-DP network can consist of a max. of 127 participants. The
data transfer rate in the MPI network is 187.5 kBaud. Transfer rates of 9.6 kBaud
to 1.5 MBaud are possible in the PROFIBUS-DP network with the MPI/DP port.
Note
You will find information on how to set up a PROFIBUS-DP network in the manual
”Automation system S7-300, structure, CPU data” order
no. 6ES7 398-8AA02-8AA0.
*) Electrical isolation in a safety extra-low voltage circuit (SELV)