IO-Link is the first standardized IO technology worldwide (IEC 61131-9) for the communication with sensors and also actuators. The powerful point-to-point communication is based on the long-established 3-wire sensor and actuator connection without additional requirements regarding the cable material. So, IO-Link is no fieldbus but the further development of the existing, tried-and-tested connection technology for sensors and actuators.
Frequently Asked Questions
Why is IO-Link needed?
Is IO-Link another fieldbus?
How fast is signal transmission via an IO-Link connection?
What data are transmitted using IO-Link?
Which sensors without IO-Link capability can be connected to an IO-Link (master)?
Is mixed operation of IO-Link and conventional devices possible?
Both device types can be operated on a mixed basis within one system.
What changes in terms of installation and application?
Is the system simpler than known communication structures?
What must be observed when wiring?
Standardized 3-wire connecting cables or single strands in the switch cabinet are used. No shielding is required.
What type of connectors are required on the sensor side?
No special IO-Link connectors or cables are required. The recommended minimum cross sections must be adhered to. For 20 m cable lengths the minimum cross section is 0.34 mm². As unshielded cables can be used, M8 and M12 standard connectors are certainly the most commonly used.
Is it possible to transmit safety-relevant data such as emergency stop commands via IO-Link?
The transmission of safety-relevant data is not planned at present.
What happens if an IO-Link proximity switch is defective and an identical replacement is not available?
An IO-Link proximity switch (a switching output) can also be exchanged with a corresponding standard proximity switch. Automatic identification, reconfiguration and other communication capability-related functions are then not available. In this case, only the switching signal is transmitted.
How is voltage disconnection achieved for drive systems?
The potential-free contact is achieved using pin 2 and pin 5. For this purpose, a 5-pin standard cable is to be used.