V02.00 | 2019/10
11
4.2 System architecture
At least one IO-Link master and one IO-Link device (e.g. sensor or actuator) are required for IO-
Link communication. IO-Link master and IO-Link device are interconnected via an unshielded 3-
wire or 5-wire standard cable. The setting can be carried out with a configuration tool or via the
fieldbus level.
The IO-Link master establishes the connection between IO-Link device and the higher-level
control system. An IO-Link master can have several IO-Link ports. Only one IO-Link device can
be connected to each port.
IO-Link hubs also make it possible to integrate devices without an IO-Link output in automation
systems via IO-Link.
Standard tools and functions are provided for the integration, commissioning and configura-
tion of the IO-Link communication.
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Fig.1: IO-Link system overview
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