A proximity switch is a device which causes a switching
action without physical contact. Proximity switches respond to targets that come within the active range
of their generated sensing fields. These units are completely self-contained, and house a field generator,
amplifier, and other necessary circuitry to accomplish electronic switching.
The units are all solid state and have no moving parts
that can wear out. The electronic switches are not susceptible to contact contamination, contact erosion, or
material transfer as are mechanical switches.
Position switches with safety function are suitable for
sliding and hinged safety guards which need to be closed to ensure the necessary operational security.
The units are all solid state and have no moving parts
that can wear out. The electronic switches are not susceptible to contact contamination, contact erosion, or
material transfer as are mechanical switches.
Along with the mechanically operated limit switches,
magnetic reed switches (magnetically operated) have been constantly gaining increased importance.
They can be regarded as a complement to the plunger, roller and turret head operated limit switches and as an
important addition to electronic proximity switches.
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.
The belt alignment and slack-wire switches are suitable
for use on material handling equipment.
The belt alignment switches are actuated, when the
conveyor belt becomes misaligned. Depending on the plant arrangements, this signal can be used to switch the
equipment off or to provide automatic correction of the belt alignment.
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).
Foot switches are mounted on machines and plants in
cases where operation using the hands is not possible. They are used to start and stop operations and production
processes.
Depending on the environmental conditions and
mechanical duty, differing versions of foot switches are used. 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.
Command and signalling devices are highly important
devices at the man-machine interface in industrial applications. They are used for instance in control cabinets,
-on control panels, two-hand controls, in elevator construction or on conveyor and transport plants.
After the manual actuation, the components initiate or
switch off work processes and functional processes.
