It is used for connecting the stations programming (PC or personal computer), operator consoles, and other devices in the SIMATIC family. This technology has inspired the development of protocolProfibus.
The MPI is based on the standardEIA-485 (formerly RS-485) and works with a speed of 187.5 kBd.
The network MPI must have resistance at the end of the line and it is generally included in the connector and activated by a simple switch.
Manufacturers using MPI technology offer a range of connections to a PC: MPI cards, PCMCIA cards, USB adapters or Ethernet.