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Operating Instructions
Page 42/60
8 IO-Link information
IO-Link is a serial, digital communication protocol for use in industrial environments. It is used to connect sensors,
actuators and also measuring systems (IO Link devices) to an automation system. IO-Link digitizes the "last meter" in
communication with sensors and actuators.
IO-Link is standardized in IEC 61131-9. Part 9 describes IO-Link under the designation "Single-drop digital
communication interface for small sensors and actuators" (SDCI).
Where previously only binary switching states (On/Off) or analog signals were transmitted, status information can now
also be read from the IO-Link device and parameterization information can be transmitted to the IO-Link device. This
circumstance now also enables problem-free connection of the measuring system.
IO-Link is not another bus system, but a point-to-point connection between the IO-Link device and a connection unit,
the IO-Link master.
The IO-Link master communicates with the IO-Link devices, collects their data and transmits them to the higher-level
bus system (fieldbus) or to the Industrial Ethernet.
System overview [Source: IO-Link Firmengemeinschaft]
IO-Link Firmengemeinschaft
c/o PROFIBUS Nutzerorganisation e.V. (PNO),
Haid-und-Neu-Str. 7,
D-76131 Karlsruhe,
Tel.:
++ 49 (0) 721 / 96 58 590
Fax:
++ 49 (0) 721 / 96 58 589
E-mail: