Function and Function of IFM Proximity Switch

Function and Function of IFM Proximity Switch

The measurement of this type of switch usually involves one electrode of the capacitor, while the other electrode is the outer shell of the switch. This casing is usually grounded or connected to the device casing during the measurement process. When an object moves towards a proximity switch, regardless of whether it is a conductor or not, its proximity always causes a change in the dielectric constant of the capacitor, resulting in a change in capacitance and a change in the state of the circuit connected to the measuring head. This allows for the control of the switch's on or off state. The objects detected by this proximity switch are not limited to conductors, but can also be insulating liquids or powders.

This type of switch is sometimes called an inductive proximity switch. It uses conductive objects to generate eddy currents inside the object when approaching the proximity switch that can generate an electromagnetic field. This eddy current reacts with the proximity switch, causing changes in the internal circuit parameters of the switch, thereby identifying the presence or absence of conductive objects moving closer and controlling the on or off of the switch. The object that this proximity switch can detect must be a conductive material.

Working voltage [V]20...250 AC/DC

Protection levelII

For today's industrial applications, inductive sensors are used for position detection. Compared to mechanical switches, they can create almost the same conditions: non-contact detection, no wear, high switching frequency, and high switching accuracy. In addition, they are insensitive to vibration, dust, and moisture. Inductive sensors can detect all metals in a non-contact manner. They are also known as inductive proximity switches or simply proximity switches.

With a wide operating temperature range and high protection level, these sensors are highly suitable for use in harsh industrial environments. Among them, inductive sensors with a protection level of IP68 or IP69K even have high sealing performance in applications such as food and pharmaceutical industries. Their working temperature can reach 100 ° C, especially resistant to temperature shocks.

Moreover, their detection range is very large and they can be installed flush, which can effectively protect mechanical tolerances and minimize sensor damage issues. Its installation is very simple: simply rotate the sensor to the bottom to install it in place.

Inductive analog proximity switches are suitable for existing applications. By utilizing IO Link, it can provide a wide range of additional features and information.

Very suitable for situations with limited space: remote IO Link parameter settings

Ensure process reliability through switch point monitoring function that can detect wear and tear

Internal equipment temperature monitoring and other diagnostic functions help prevent malfunctions

Resistant to cleaning agents, very suitable for sanitary areas

Easy to install, can be directly installed on the sensor or on the connecting wire

output functionNormally Open

Sensing distance [mm]8

shellThread structure

Size [mm]M18 x 1 / L = 80

Reverse phase protectionNo

The oscillator is composed of an inductor, a capacitor, and a transistor, and generates an alternating magnetic field. When a metal object approaches this magnetic field, eddy currents are generated inside the metal object, causing the oscillation to stop. This change is amplified by the back pole and converted into a transistor switch signal output.

Function and Function of IFM Proximity Switch