You probably do not come from: Singapore.  If necessary, change to: United States
  1. IO-Link
  2. Applications in the Process Industry

Applications in the process industry

Media detection in process tanks

The ifm LMT level sensor is used as a switch to determine the low and high level or pump run dry condition in tank applications. Typically, the feedback will be "on" when the media is present and "off" when there is no media.

Additional functions with IO-Link data:

By using IO-Link, additional information is accessible. With IO-Link, the real digital process value is available to determine the type of the media, such as water or milk, etc. The IO-Link value can be used to differentiate between medium and build-up on the sensing face. Identification of the media is critical in the washing process. Once the media is flushed out, the cleaning process can be started to maximize production time.

Continuous tank level measurement

The PI pressure sensor provides a 4…20 mA and switching output. Traditional analogue signals can be prone to EMC disturbances and need to be scaled to show the real pressure of the system at the plc.

High and low pressure spikes are stored in the sensor but have no direct access to the control system.

Additional functions with IO-Link:

With IO-Link, real pressure values can be accessed without the need to scale the signal. For example, a pressure sensor rated from 0 to 100 in H2O, the same value range is accurately transmitted to the control system without the need for scaling.

By retrieving high and low pressure values from the sensor, any unexpected pressure spikes and dips can be monitored directly. This is important because it can lead to sensor failure or contaminated products.

Redundant temperature measurement for pasteurizers

During milk production, it is of high importance that the correct temperatures are kept. The self-monitoring and diagnostic functions of ifm's TAD temperature transmitters ensure that the process runs smoothly. The TAD sensor is the first sensor with drift detection for the food industry. The sensor is designed with two independent measuring elements with different characteristics that directly increase process reliability. When a drift occurs, a warning signal is transmitted to the plc.

Additional functions with IO-Link:

IO-Link enables the monitoring of both temperature elements. In addition, a third value, which is the average of both values, is transmitted to the control system. This means three different temperature signals can be transmitted and monitored via a single cable. The redundant temperature signals allow for customized drift detection based on the machine process and offers a solution where calibration of the sensor is reduced.

Cooling water monitoring in the foundry

The cooling system in a typical furnace is critical to its proper machine operation and to the process of producing quality parts. In addition, accurate cooling of the elements improves the life cycle and safety of the machine. In order to do this, several flow parameters of the cooling water, such as temperature and flow, need to be accurately monitored. This requires multiple sensors and installation points throughout the machine.

Additional functions with IO-Link:

ifm's SM magnetic-inductive flow meter via IO-Link transmits flow rate, temperature and a totalizer value via a standard 3-wire cable, eliminating multiple costly analogue cards, extra pipe fittings, numerous termination points and excessive stock inventory.