Flexible thanks to IO-Link: OT43

In applications, the distance of an object often needs to be determined using a sensor. This requires a sensor with an analog output. In this context, it is sometimes also helpful to adapt the measuring range of the sensor to the conditions so that the full analog current or voltage range can also be used for smaller areas.

Ultrasonic sensors are usually the first choice for determining the distance of large objects. However, if small parts need to be detected or high resolutions are required, then this is actually a task for laser sensors. However, such devices are very expensive due to their complex technology.

As a real alternative, ipf electronic offers the OT430025 (0-10V output) and OT430070 (4-20mA output) red light sensors. The sensors are via a transmitter LED with a point-shaped light spot with a diameter of 8mm. The measuring range is between 50 and 400mm, the resolution varies between 0.1 and 1mm, depending on the measuring range. The measuring range cannot be changed during normal operation. However, with the help of an IO link master (e.g. VY000005), the devices can be parameterized even more flexibly than is usual with diffuse reflection laser sensors.

Using the software for the OT43, the distance to an object can also be visualized directly instead of determining the distance via the analog output (use of an external display required). The start and end points of the measuring range can be entered directly as a numerical value or taught in using the teach function. This is even possible during running operation. The switching point of the alarm output can also be parameterized. Because the receiver signal is constantly checked, IO-Link can also detect the signal quality and thus any soiling.

If a device should actually have a defect during running operation, it is very easy to replace. Once the parameter data has been saved, it can be easily transferred to the replacement device without having to teach in the measuring range again and therefore without major interruptions to production.