70156-3342

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Optical sensors have become a key tool in industrial control systems, due to their accurate sensing and low production costs. The 70156-3342 is a versatile photoelectric switch specifically designed for industrial applications. It is a two-part sensor, with an infrared emitter and a separate receiver, connected together by a cable.

General Design

The light source is formed by a focusable infrared LED emitter, mounted in a protective cast aluminium housing. The receiver module contains a matched detector, mounted in a similar housing and also connected to the emitter by a cable. The two components are mounted at a fixed physical distance from one another. The total cable length available is 3 metres, which can be extended up to 12 metres with the aid of an extender.

Application Fields

The 70156-3342 is perfectly suitable in power and automation applications, where small areas need to be monitored. Typical applications for the sensor include access control, door opening detection, and intrusion detection, as well as movement detection. The LED emitter provides a stable infrared output, reducing background false triggering due to external light sources, such as sunlight or artificial lighting. As an added feature, the receiver may be manually switched to supply a voltage between 0-10V, for applications requiring additional sensing range.

Working Principle

The basic idea behind the sensor is simple: the emitter produces and emits an "invisible" infrared beam, at a frequency of which the detector is sensitive. When the receiver detects this beam, it triggers the alarm/sensor circuit. The detector is capable of responding even if the beam is blocked for up to a certain time, ensuring that the system is always ready for use. This automatic reset and re-activation of the sensor means that even in the event of a beam break caused by physical interruption, the system will be re-activated in no time.

Product Features

The 70156-3342 offers a number of interesting features, such as a wide sensing range (from 4m to 25m) and adjustable sensitivity, allowing it to be tailored to the desired application. Furthermore, the responsiveness of the receiver can be adjusted to suit specific applications. In addition, the emitter can be manually switched to supply a voltage between 0-10V, allowing the detection of objects at greater distances than would be possible with a standard product. Finally, the sensor includes an industry-standard M12 connector, making it easy to integrate with a range of other components, such as PLCs, primary controllers, and other automation and control systems.

Conclusion

The 70156-3342 is a versatile and reliable photoelectric switch, designed for a range of industrial applications. It includes a focusable IR emitter and a matched detector, with adjustable sensitivity and sensing range. The sensor has an industry-standard M12 connector and can be connected to a range of other components. It is a robust and stable solution, suitable for use in power and automation applications, making it an ideal choice for a variety of applications.

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