Siemens Simatic 620 Owner's Manual page 58

Setting Up and Operating the SIMATIC Box PC 620
Connecting
Via the PROFIBUS/MPI interface, you can connect your PC to
S MPI networks (S7-200, S7-300, and S7-400) or
S PROFIBUS DP networks (DP components).
PROFIBUS/MPI Network
Up to 32 devices (PC, programming device, or programmable controller) can be
connected to the PROFIBUS/MPI interface to form a network segment. The physi-
cal connection to the network is via a floating RS485 interface which is a compo-
nent of the PC basic module.
Several network segments can be connected via repeaters. The complete network
can comprise up to 127 stations. Data transmission rates from 9.6 Kbps to
12 Mbps are possible.
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SIMATIC Box PC 620 Manual
A5E00131465-01