The Leuze S420 stainless steel safety hinge switch, available from South African sensor solutions provider Countapulse Controls, offers an ideal solution for mechanically and hygienically challenging applications in industries such as food and beverage, pharmaceuticals or cosmetics. It is unique in that it combines the safety switch and door hinge functions in a single component.
The company notes that restricted or high-risk areas are generally guarded by hard guards. “To be able to enter this area in the event of a fault, a protective door, which is predominantly used by maintenance and repair personnel, is equipped with safety switches and corresponding separate actuators.
However, owing to the sensitivity of the actuators and the general rough use of the doors, actuators are often damaged after a short time. This is why an alternative, reliable and long-lasting solution was sought that would be easy to mount and would not be so easy to damage, owing to its robust design. Thus, the safety hinge solution was developed.”
The new safety hinge switches have numerous applications. An example would be the position monitoring of hard guards, such as protective hoods that can rotate by means of a monitoring switch (without guard interlocking) integrated into the hinge. The switch does not require an external actuator, which means it is also suitable for use in environments with high dust concentration levels or with heavy particle loads.
Its fault-free function is ensured even with warped or misaligned doors by means of a repeatable setting (that switches angle alignment). The actuator is integrated into the housing, while electrical connection is by means of either a cable or an M12 plug with optional cable entry from above, below or on the wall or mounting side. This allows for the monitoring of all types of doors, hoods and flaps. The safety hinge switch has an opening angle of up to 180°, which can be adjusted as many times as required.
The Leuze S420 stainless steel switch offers optimum cleaning options, even with high-pressure cleaning, as a result of its wall-side cable outlet, a high-grade surface with a roughness of less than 0.8 μm and an ingress protection of IP67 and IP69K, which essentially means that it is waterproof. In addition, covered tamperproof screws reduce the risk of contamination by a considerable margin.
This safety hinge switch is also recommended for the wood products industry in situations where high availability is critical under dust and particle loads. Through the six-point bolting of the joint, even heavy doors can be guarded reliably and with extended service intervals. Users can select from device versions featuring contact blocks or safety-related switching outputs. This makes it possible to have a series connection of 32 devices without compromising the safety level.
Countapulse Controls has over 40 years’ experience in specialist sensing technology and offers reliable, efficient and application-appropriate sensing, control and motion detection solutions.
The company stocks products for numerous international brands. These include German industrial components manufacturer Hengstler’s counters and encoders, as well as sensor manufacturer Leuze Electric’s photoelectric sensors and other sensing solutions, Swedish sensor specialist EGE’s flow monitoring and specialised sensors, sensor supplier Pulsotronic’s inductive sensors, German electric components supplier ABP’s drive components and electronics manufacturer Secatec’s magnetic switches.
Leuze Electric was established in 1963. Headquartered in Owen, Germany, the company has 18 subsidiaries worldwide and sales partners in 40 countries. As of 2015, it employs more than 1 000 people and gene- rates in excess of £100-million a year.