Siemens SIMATIC ET 200AL System Manual page 70

IO-Link
Standard for communication of actuators and sensors in the lowest field level.
IO-Link device
Distributed field device that is connected to an IO-Link master via an IO-Link cable.
IO-Link I/O modules
I/O modules that are connected to an IO-Link master and operated via an IO-Link connection.
IO-Link master
The IO-Link master is a module that is connected to the CPU (IO controller) via a fieldbus and
to IO-Link devices via IO-Link cables. It prepares the data for/from the IO-Link devices and can
back up and restore the parameters.
Parameter assignment
Parameter assignment is the transfer of parameters from the IO-Link master to the IO-Link I/O
module.
PELV
Protective Extra Low Voltage = Extra low voltage connected to protective ground
PROFINET
PROcess FIeld NETwork, open Industrial Ethernet standard, which continues PROFIBUS and
Industrial Ethernet. A cross-manufacturer communication, automation and engineering
model, defined as an automation standard by PROFIBUS International e.V.
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 (for example,
distributed I/O system, valve terminals, frequency converters, switches).
PROFINET IO
Communication concept for the realization of modular, distributed applications in the
framework of PROFINET.
IO-Link I/O modules
System Manual, 10/2020, A5E48755395-AA
Glossary
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