schmersal switches

Application:
Pull-wire Emergency Stop switches are mounted on machines and sections of plants which cannot be protected by guards. In contrast to mushroom head Emergency Stop push buttons, on pull-wire switches the Emergency Stop command can be initiated from any point on the wire.

In combination with one of the AES and AZR range safety monitoring modules pull-wire Emergency Stop switches can be used for Control Category 3 or 4 to EN 954-1.

Design and mode of operation:
All of the pull-wire Emergency Stop switches conform to European Standard EN ISO 13850. They have a positive linkage between the NC contacts and the wire rope. The pull-wire emergency stop switches are brought into the operational condition by pre-tensioning the wire, i.e. the NC contacts are then closed and the NO contacts open.

All of the pull-wire Emergency Stop switches have wire-breakage monitoring. On pulling or breakage of the wire, the NC contacts are positively opened and the NO contacts are closed. The pull-wire Emergency Stop switch can then only be returned to the operational condition by a resetting operation. 
 

Foot switch

Application:
Safety foot switches are mounted on machines and plants as permissive switches in cases where manual operation is not possible.

Design and mode of operation:
All safety foot switches are mounted with a shield to protect against unintentional operation. When the foot pedal is actuated to as far as pressure point, the NO contact is closed. If, in case of danger, the pedal is actuated beyond the pressure point, then the positive break NC contact is opened and mechanically latched. Reset operation is carried out by means of a push button. During the reset operation, the switch does not move through the switching-on point.

The safety foot switches conform to protection class IP 65.

Slack-wire switch                                                                     

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

The slack-wire switches monitor the wire rope tension. With correct tension present, the switch is actuated.                                                                         

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.

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 requirement, high switching capacity and robust design are some of the many advantages of these mirco switches. With the usual international mounting and overall dimensions as well as a selection of various methods of connection, the switches can be universally applied.

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 devices are listed in order of size, starting with the smallest

Photo-electric proximity switches   

  Housing construction form: cylinder, thread

Inductive proximity switch                                   Application, design and mode of operation:
A proximity switch is a device which causes a switching action without physical contact. SCHMERSAL 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.

Gear-switches                                                      

Magnetic reed switch

Belt alignment switch

Position switch