Safety Switches with Metal Housing
220Pages

Safety Switches with Metal Housing EUCHNER More than safety.

Internationally successful – the EUCHNER company EUCHNER GmbH + Co. KG is a world-leading company in the area of industrial safety technology. EUCHNER has been developing and producing high-quality switching systems for mechanical and systems engineering for more than 60 years. The medium-sized family-operated company based in Leinfelden, Germany, employs Headquarters in Leinfelden-Echterdingen around 750 people around the world. 18 subsidiaries and other sales partners in Germany and abroad work for our international success on the market. Quality and innovation – the EUCHNER products A...

About this catalog 4 How can I find the right switch? 4 Function and technology used in safety switches 5 Attaching safety switches 10 Overview of the switching elements 13 Safety switches type 1, metal housing 17 Single limit switches N1A and NB01 17 Safety switches type 2, metal housing 51 Safety switches NZ.VZ without guard locking 51 Safety switches NZ.VZ.VS with guard locking 57 Safety switches TZ with guard locking and guard locking monitoring 63 Safety switches NX without guard locking 89 Safety switches TX with guard locking and guard locking...

General About this catalog The Safety Switches with Metal Housing catalog gives you an overview of our safety switches with metal housing. For numerous applications these switches are the right choice due to their robustness and long service life. You will find the technical data after the product overview. There is a reference to the page with the related technical data on the pages listing the products. At the front of the catalog you will find useful information on the topic of safety switches. We have prepared an overview of the standards and a glossary on this topic in the appendix....

General EUCHNER General EUCHNER Function and technology used in safety switches Standards Safety switches must meet the requirements for safety components as per the Machinery Directive. The Machinery Directive has been implemented in national law in the EU member states and, as a result, is binding for all manufacturers. Detailed requirements for the switches are defined in EN 60947 Part 5-1 (Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements. Electromechanical control circuit devices). If the requirements of this standard are met, conformity...

Attaining the safety function the continuous pressure from the compressed rubber can be reduced. In this way the load is reduced on the switch head and the door mechanism. Attaining the safety function Switching elements Different switching elements are available for the switches offered in the catalog: Single switching element Double switching element with two independent switching contacts Quadruple switching element with four independent switching contacts Safety switches type 2 On safety switches type 2, the actuating element for the switch is coded. The actuating elements are available...

General EUCHNER General EUCHNER Contacts closed Snap-action switching element On snap-action switching elements, the change from the completely closed state to the completely open state is made at a defined point. As a result the operating point is at a defined position, unlike on slow-action contact elements. Snap-action switching elements typically have a switching hysteresis. Free position End position Travel diagram Snap-action switching element Positively driven contacts are used in the switching elements. These are special switching contacts that are designed to ensure the switching...

Process protection To prevent the unintentional closing of a guard, lockout bars are available for switches type 2. The lockout bar is inserted in the safety switch instead of the actuator when the guard is open. The lockout bar can then be secured with commercially available padlocks (up to five locks) to protect against removal. Often a guard is only to be locked to prevent interruption to the process due to unintentional opening of the guard. In this case the position of the guard locking solenoid does not need to be integrated in the safety circuit. In this situation the series...

General Changing the approach direction Often the actuator approach direction does not match the standard alignment of the actuating head as delivered. For this reason, the actuating heads on the safety switches NZ, TZ, NX, TX and STA can be very straightforwardly adjusted to the required direction. Changing the approach direction safety switch NX/TX Changing the approach direction single limit switch N1A/NB01 D Changing the approach direction safety switch STA Changing the approach direction safety switch NZ (4 x 90°) After undoing the four fixing screws, the actuating head can be rotated...

General Attaching the safety switch TZ with actuating head fitted on left or right The safety switch TZ can be mounted in a large number of different installation positions. Often the switch is mounted horizontally on the roof of a machine or with a suspended actuator head. The method of attachment depends on whether the switch is to be attached in a protected installation position, for instance to make tampering more difficult, or whether the switch is to be mounted so that it is easily accessible as the escape release must be within reach from inside the system. Plan view Door hinged on...

General Electrical connection On switches with cable entry there is a large space envelope for making the electrical connection. Modern wiring concepts increasingly utilize plug-in connections. A switch with plug connectors can be easily replaced during servicing work. This configuration results in short downtimes. The safety switches NZ and TZ are available with various plug connectors. The corresponding mating connectors are also available as accessories with permanently connected cables of different lengths. Guard locking solenoid Switch layout for design TZ Locking arm The locking arm...