IO-Link components – find manufacturers and suppliers

IO-Link is a globally standardized communication system for the point-to-point connection of sensors and actuators to the automation level.

Its components close the gap between classic binary sensor technology and fieldbus systems by enabling additional data, parameterization and diagnostics down to sensor level. IO-Link is not a fieldbus, but an intelligent communication standard for the lowest automation level.

Below you will find the functionality and types of IO-Link components, their use and advantages as well as their technical and organizational aspects:

Functionality of IO-Link components:

IO-Link is based on serial, bidirectional point-to-point communication between an IO-Link master and an IO-Link device.
The connection is made via unshielded, three- or five-wire standard cables, as already known from sensor technology.

The basic process:

1. The IO-Link master supplies the device with power.
2. process data is transmitted cyclically via the same cable.
3. In addition, parameters, diagnostic data and identification information can be exchanged acyclically.
4. Communication is deterministic and interference-free.
5. The master integrates the data into higher-level fieldbus or Ethernet systems.

This adds intelligent communication to classic signal transmission.

Central types of IO-Link components:

1. IO-Link devices (sensors and actuators):
   IO-Link devices are the actual field devices.
   These include sensors for distance, pressure, temperature, flow, position or fill level as well as actuators such as valves, grippers or drives.
   In addition to process values, they also provide status and diagnostic data and can be parameterized.
2. IO-Link master:
   The IO-Link master forms the interface between the IO-Link devices and the controller.
   It provides several IO-Link ports, supplies the connected devices with power and transmits their data to higher-level bus systems such as PROFINET, EtherNet/IP or EtherCAT.
3. IO-Link hubs:
   O-Link hubs are used to connect classic binary sensors or actuators to an IO-Link port.
   They bundle several digital signals and make them available to the IO-Link master.
   This means that non-IO-Link-capable devices can also be integrated.
4. IO-Link configuration tools:
   Software tools are used for parameterization and diagnostics.
   These allow sensor parameters to be set, status data to be read out and device settings to be documented.
   They can often be used across manufacturers.
5. Accessories and infrastructure components:
   These include standard sensor cables, distributors, adapters and mounting materials.
   A major advantage of IO-Link is the use of existing, cost-effective cabling without special requirements for shielding or topology.

Use of IO-Link components:

IO-Link components are used in almost all areas of industrial automation:

1. Mechanical engineering:
Flexible parameterization of sensors and actuators.

2. Production and assembly:
Condition monitoring and process optimization.

3. Logistics and conveyor technology:
Transparent sensor technology and fast diagnostics.

4. Process industry:
monitoring of conditions at field level.

5. Food and pharmaceutical industry:
Reproducible parameterization during format changes.

6. Smart factory applications:
Data acquisition for condition monitoring.

IO-Link is particularly useful where frequent product changes, short downtimes and high transparency are required.

Advantages of IO-Link components:

• Extended data availability: In addition to switching states, detailed process and diagnostic data is available.
• Central parameterization: Settings can be made conveniently from the control system or via software
• Faster commissioning: Automatic device recognition and parameter feedback reduce downtimes
• High flexibility: Adaptation of sensor functions without mechanical intervention
• Reduced wiring effort: Use of standardized, cost-effective cables
• Manufacturer-independent standard: Globally standardized and interoperable
• Predictive maintenance: early detection of faults through status and diagnostic data

Technical and organizational aspects of IO-Link components:

• IO-Link is compatible with existing automation concepts and can be introduced step by step.
• Classic sensor technology can be integrated via IO-Link hubs without having to rewire entire systems.
  This makes IO-Link suitable for both new systems and modernizations.

IO-Link components form the basis for an intelligent, transparent and flexible field level in industrial automation. Thanks to the combination of simple cabling, bidirectional communication and comprehensive diagnostic options, they open up new possibilities for efficient processes and condition-based maintenance. Their standardization, future-proofing and cost-effectiveness make IO-Link a key component of modern automation solutions and an important prerequisite for Industry 4.0 concepts.

Here you will find an overview of the most important points to consider when purchasing IO-Link components:

IO-Link has established itself as a globally standardized interface for sensors and actuators and has become an integral part of modern automation solutions. In addition to simple signal transmission, professional IO-Link components also enable parameterization, diagnostics and status monitoring at field level. However, careful selection is crucial when purchasing IO-Link components: the benefits of flexibility, efficiency and process reliability can only be fully exploited if devices, masters, hubs and accessories are precisely matched to the operational requirements. An ill-considered purchase can lead to integration problems, downtime and unnecessary costs.

• First of all, it must be clearly defined which tasks the IO-Link components should fulfill.
• Is it primarily about sensors, actuators, parameterization or diagnostics?
• Is cyclical process data or one-off parameterization required?
• The operating environment - temperature, humidity, dust or EMC load - is also decisive for the selection of robust and reliable devices.
• For sensors and actuators, it should be checked whether they are suitable for the planned measured variables or actions. Further points are:
• Resolution, accuracy and repeatability.
• Cycle time and maximum switching frequency.
• Mechanical interfaces and mounting options.
• Compatibility with the IO-Link masters used.
• A sensor that is too slow or inaccurate can impair the entire process, while an actuator with the wrong performance will not fulfill its function.
• The IO-Link master forms the interface to the controller. Important aspects:
• Number and type of ports (standard ports or high-speed ports).
• Compatibility with higher-level fieldbuses or Ethernet systems.
• Supported IO-Link versions and protocols.
• Diagnostic and parameterization functions at master level.
• The choice of master influences the integration, flexibility and expansion options of the entire system.
• When purchasing, it must be ensured that the data formats, signals and communication speeds are compatible with the higher-level control or management systems. This includes checking whether:
• Process data is transferred correctly to the PLC or control system.
• Parameterization and diagnostic data can be used.
• Standardized communication profiles (IODD, Device Description Files) are available.
• Clear compatibility reduces integration costs and subsequent adjustments.
• IO-Link components are often exposed to harsh conditions. The following criteria should be taken into account:
• Protection class (IP protection against dust and moisture).
• Temperature range, vibration and shock resistance
• Chemical resistance (e.g. oil, cleaning agents)
• EMC resistance
• The right choice guarantees reliable operation and reduces the risk of failure.
• Especially in safety-critical applications, IO-Link components are part of higher-level safety logic. The following must be checked:
• Compliance with relevant standards, e.g. IEC 61131, IEC 62026-2 for IO-Link.
• Safe signal transmission for safety-relevant sensors.
• Redundant data transmission and diagnostic capability.
• Standard-compliant devices facilitate the certification of systems and reduce liability risks.
• Professional IO-Link components should be low-maintenance, durable and easy to replace. Also relevant:
• Software tools for parameterization and diagnostics.
• Manufacturer support and documentation.
• Long-term availability of spare parts.
• Standardized interfaces to enable future expansions.
• This makes the investment future-proof and flexible for production adaptations.
• In addition to the purchase price, all life cycle costs should be taken into account, including
• Installation and wiring.
• Commissioning and parameterization.
• Energy consumption and operating costs.
• Failure risks and maintenance.
• It is often worth investing in higher-quality, long-lasting devices, as these significantly reduce overall costs and downtimes.

Professional purchasing of IO-Link components requires a holistic view of function, integration, safety and cost-effectiveness. Key factors are the selection of suitable devices, compatibility with IO-Link masters and controllers, robust design for the operating environment and a well thought-out maintenance and service concept. Only if these aspects are taken into account can IO-Link fully unfold its advantages - extended data availability, simple parameterization, fast commissioning, process optimization and flexibility. A sound purchasing strategy protects investments, increases system efficiency and enables safe and economical automation solutions in the long term.

IO-Link components can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of IO-Link components from all over the world can be found on Exportpages.