Schmersal online catalogue
Automation technology

Automation technology

Cameras

3D camera
Time-of-Flight Technologie (ToF)
Use in manufacturing processes, logistics and robotics
Standardised GenICam data interface
Optimally adaptable to different ambient and mounting conditions

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Command and signalling devices

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Command and signalling devices

Application:
Command and signalling devices are of great importance for the man-machine interface in the field of industrial applications. They are used, for instance, in control cabinets, control panels, two-hand control panels, in elevator construction or on conveyor and material handling plants. The manual actuation of the devices starts or stops operating sequences and functional processes

Design and mode of operation:
Command devices are available in the form of pushbuttons, joystick switches or key-operated switches. The actuators are connected to the switching element through a bayonet socket.

Foot switch

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Foot switch

Application:
Safety foot switches are mounted on machines and plants in cases where manual operation is not possible. They are used to initiate and shutdown work and production cycles.

Depending on the ambient conditions and mechanical load, there are different foot switch variants. The robust foot switches are generally used in the engineering industry, e.g. on presses, punching and bending machines as well as in sheet-steel processing.

Design and mode of operation:
All the foot switches are available in versions with multiple pedals. 232 range switches are mounted with a shield to protect against unintentional actuation.

They have the protection class IP 65 or 67.

Inductive proximity switch

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Inductive proximity switch

Application, design and mode of operation:
The proximity switch is an electronic command device. Compared to the mechanical limit switch, it features non-contact switching upon approach as well as an electronic, i.e. non-contact, operation.

As there are no wearable mechanical parts such as actuating mechanisms and contacts, the service life of a proximity switch is virtually unlimited. Contact burning and contact contamination caused by ambient influences cannot occur.

Electronic proximity switches function without noise, bounce and reaction. They are insensitive to vibration and shock. There is no unreliable contact as can occur with mechanical switches, e.g. actuation too low, switching current too slow, etc. There is no contact bounce when switching direct current.

The oscillator resonant circuit, located in the proximity switch, uses an open core coil to help produce a concentrated high frequency electromagnetic (RF) field, which emerges from the active surface of the sensor. If an electro-conductive target (e.g. metal) enters this field, eddy currents are induced. The floating induced eddy current draws energy from the LC circuit (L: coil, C: capacitor). The load on the oscillator circuit evokes a decrease in the oscillating amplitude. The oscillator is attenuated.

The decrease of the oscillating amplitude is converted into an electrical signal by the electronic circuit, which leads to a change of switching state of the proximity switch. This leads to a change of the switching condition of the proximity switch.

When the electroconductive material is removed from the inductive field, the pulse amplitude increases and via the electronic circuit the original switching position is recreated. The oscillator is unattenuated.

Position and limit switches

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Magnetic reed switch

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Magnetic reed switch

Application:
Alongside mechanically operated limit switches, magnetic reed switches are enjoying an increase in importance. They are often used to complement limit switches with plungers, rollers and swivel levers and are considered an important link to non-contact and contactless limit switches.

Pull-wire switches

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Pull-wire switches

Application:
The pull-wire switches are used to give signals to start machines and to open or close electrically driven doors, gates and barriers.

The pull-wire switches are manually operated by pulling.

Rotating spindle limit switch

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Rotating spindle limit switch

Application:
This rotating spindle limit switch with snap-action insert is only fit for use in normal to average operating conditions, e.g. for machine tools, cranes and conveyors. Protection class IP 65 to IEC/EN 60529.

Slack-wire switch

Metal enclosure
2 Contacts
106 mm x 181 mm x 63 mm
Suitable for heavy duty

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Slack-wire switch

Application:
Belt alignment switches and slack-wire switches are suitable for use on material handling equipment.

The slack-wire switch monitor the wire tension. If the wire is properly tensioned, the switch is actuated.

Belt alignment switch

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Belt alignment switch

Application:
Belt alignment switches and slack-wire switches are suitable for use on material handling equipment.

The belt alignment switch is actuated, when the conveyor belt becomes misaligned. Depending on the plant set-up, this signal can be used to switch off the machinery or plant either to provide an automatic correction of the belt alignment.

Gear-switches

Metal enclosure with impact-resistant plastic hood
Various cam shapes for varying switch travel
Available for easy adjustment of switching points by setting disk cams from front

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Gear-switches

Application:
The gear-switches are suitable for use in the most varied application. In studios and on stages, applications include the control and positioning of carriages, portals and bridges. An important field of application is for the monitoring and control of outriggers, trolleys and lifting movements for cranes. On industrial ovens, gear-switches are used on door and gate control systems. Further applications are to be found on waterways (control of weirs and locks), in environmental protection (sewage plants, flue gas treatment plants), greenhouses and sport stadiums (roof controls).

Micro switches

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Micro switches

Application:
Micro switches are used, for example, in control, regulation, precision engineering and on appliances as well as motor vehicles.

Design and mode of operation:
Minimum space requirements, a high switching capacity and a robust design are just a few of the many benefits of a micro switch. With its internationally standardised mounting and external dimensions, as well as different termination types, switches can be used universally.

The micro switches are available with snap or slow action.

A large variety of actuators is available.

The switches are protection class IP 30 or 40. Versions are available with "finger-proof" covers. The following device types are sorted according to enclosure dimensions, starting with the smallest construction form.

Photo-electric proximity switches

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Downstream Devices

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In the Automation technology section, you will find switching appliances for mechanical position detection in various fields of application as well as (safety) sensors with different operating principles; this section also includes a comprehensive programme of command and signalling devices.