On-Off Automation Kit for Valves with IO-Link Positioner — Digital Monitoring and Predictive Diagnostics

Cematic's On-Off automation kit for valves with IO-Link positioner is the complete solution for automating ball and butterfly valves with integrated digital intelligence. Unlike conventional analog solutions, this kit incorporates an IO-Link sensor with real-time monitoring of position, and opening and closing times.

It also integrates predictive diagnostics from a single device. For this reason, it is the right choice when On-Off automation is required with full visibility of the valve status in the control system.

Its 100% digital signal also eliminates the variability of conventional analog signals. Consequently, it guarantees greater precision and reliability in process control.

It also incorporates automatic device replacement, which transfers parameters to the replacement sensor in seconds, reducing intervention time and minimizing production impact.

IO-Link Technology — What it is and why it matters

IO-Link is the international standard for point-to-point digital communication for sensors and actuators. It is the technology that replaces the 4-20 mA analog signal in modern installations.

Unlike analog signals, IO-Link transmits process data, configuration parameters, and diagnostics over the same standard signal cable. Consequently, it does not require additional wiring or special infrastructure to access device diagnostics from the PLC or SCADA system.

Each IO-Link sensor in this On-Off automation kit also provides multiple process values simultaneously using status bits and detailed event codes. In this way, the control system can detect faults at any time and maximize plant availability without the need for additional instrumentation.

Key features of the On-Off automation kit with IO-Link

Real-time Digital Monitoring

The IO-Link sensor continuously monitors the valve position, opening times, and closing times. In this way, it centralizes all process information in a single device. Therefore, no additional instrumentation is required to know the actual status of the valve.

Integrated Predictive Diagnostics

The IO-Link sensor continuously monitors the valve's opening and closing times. If a valve that normally opens in 0.8 seconds starts to open in 1.4 seconds, the sensor detects it and generates an alert event code.

This change can also indicate actuator wear, insufficient air pressure, or a deteriorated seal. Therefore, the system reports the problem before the valve completely fails.

Thanks to this, the maintenance team can plan the intervention during a scheduled shutdown, instead of reacting to an unplanned failure that stops the line.

Consequently, predictive diagnostics do not detect failures that have already occurred, but rather anticipate degradation based on real-time operating data. This significantly reduces unplanned shutdowns and their associated costs.

Automatic Device Replacement

When the IO-Link sensor is replaced, the IO-Link master automatically transfers the configuration parameters to the replacement device in seconds.

Therefore, it reduces downtime during corrective maintenance to a minimum. It also eliminates the risk of manual configuration errors that are common when replacing conventional analog sensors.

100% Digital Signal

The IO-Link digital signal eliminates the variability of the 4-20 mA analog signal. This, in contrast, can be affected by electromagnetic interference, cable resistance, or instrument calibration.

Instead, the digital signal is immune to these sources of error. Therefore, it guarantees the same accuracy regardless of cable length or electrical environment.

Technical specifications

IO-Link automation kit vs. conventional analog automation

Conventional valve automation uses analog signals for position feedback and requires separate instrumentation for diagnostics. The On-Off automation kit with IO-Link, in contrast, integrates all these functions into a single device. The most relevant aspects are compared below:

• Position signal: The analog system uses a 4-20 mA signal that can vary due to temperature, cable length, or interference. IO-Link, in contrast, transmits digital data immune to these variables, so the position reading is always accurate.
• Diagnostics: The analog system, in contrast, does not offer integrated diagnostics and requires additional instrumentation. IO-Link, in addition, provides real-time predictive diagnostics at no additional instrumentation cost.
• Maintenance: Replacing an analog sensor, in contrast, requires manual reconfiguration with a risk of error. IO-Link, therefore, automatically transfers the parameters to the new sensor in seconds.
• Process information: The analog sensor, in contrast, delivers a single process value. IO-Link, consequently, delivers multiple simultaneous values — position, times, diagnostics — from the same device.

Applications of the On-Off automation kit with IO-Link

Valve automation in the process industry

The On-Off automation kit for valves with IO-Link is the solution for automating ball and butterfly valves in process lines where digital visibility of the valve status from the control system is required.

Therefore, it is the standard component in new installations where IO-Link is adopted as the field communication protocol. It is also compatible with IO-Link masters from the main PLC manufacturers on the market.

Modernization of existing facilities

In plants with conventional analog automation, this kit also allows migration to an IO-Link digital signal without modifying existing wiring. Consequently, the modernization of the valve control system can be carried out gradually and without prolonged production shutdowns.

In addition, integrated predictive diagnostics provide immediate value from the first installation, reducing unplanned shutdowns due to actuator failure.

Reduced downtime and predictive maintenance

The predictive diagnostics of the IO-Link sensor also allow the detection of valve deterioration before it fails. Therefore, the maintenance team can plan the intervention during a scheduled shutdown window instead of reacting to an unplanned failure.

Likewise, automatic parameter replacement reduces the start-up time after a replacement. This minimizes the impact on production.

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