Siemens simatic ET 200MP, System Manual, Page: 121 / 126

Glossary
ET 200MP Distributed I/O System
System Manual, 01/2013, A5E03723484-01
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Parameter assignment
Parameter assignment is the transfer of parameters from the IO controller to the IO device.
PELV
Protective Extra Low Voltage = extra low voltage with safe isolation
Pre-wiring
Wiring of the electrical system on the front connector before the front connector is used on
the I/O module.
PROFINET
PROcess FIeld NETwork, open industrial Ethernet standard which further develops
PROFIBUS and industrial Ethernet. A cross-manufacturer communication, automation, and
engineering model defined by PROFIBUS International e.V. as an automation standard.
PROFINET IO controller
Device used to address connected I/O devices (e.g. distributed I/O systems). This means
that: The IO controller exchanges input and output signals with assigned I/O devices. The IO
controller often corresponds with the CPU in which the automation program is running.
PROFINET IO device
Distributed field device that can be assigned to one or more IO controllers (e.g. distributed
I/O system, valve terminals, frequency converters, switches).
PROFINET IO
Communication concept for the realization of modular, distributed applications within the
scope of PROFINET.
Provider-Consumer principle
Principle of data communication on the PROFINET IO: in contrast to PROFIBUS, both
parties are independent providers when sending data.
Reference potential
Potential from which the voltages of the circuits involved are observed and/or measured.
Row
All of the modules, which are attached to a mounting rail.