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EUCHNER GmbH + Co. KG
Safety Switches with Plastic Housing

Safety Switches with Plastic Housing

Product catalog summary

Overview of EUCHNER GmbH + Co. KG: EUCHNER is a prominent company in industrial safety technology, specializing in high-quality switching systems for mechanical and systems engineering. Headquartered in Leinfelden, Germany, with over 60 years of experience and around 750 employees globally, EUCHNER is renowned for its innovative safety switches that protect people and processes by monitoring safety doors on machines and installations.

Product Range: EUCHNER offers a diverse range of safety products, including transponder-coded safety switches, multifunctional gate boxes, access management systems, electromechanical and magnetically coded safety switches, enabling switches, safety relays, and emergency stop devices. These products are designed to ensure the safety of people, machines, and products.

Catalog Structure: The catalog provides an overview of safety switches with plastic housing, detailing their economy and flexibility for various applications. It includes technical data, standards, approvals, and a glossary, structured to help users find the right switch by order number or product designation, and refine their selection using tables and indexes.

Standards and Approvals: Safety switches must comply with the Machinery Directive and standards like DIN EN 60947-5-1. EUCHNER switches meet these standards and are subjected to type examinations by notified bodies. Many switches are approved by organizations such as the German Social Accident Insurance association (DGUV) and Underwriters Laboratories (UL).

Function and Technology: Safety switches prevent machine operation in hazardous situations by opening the safety circuit. They are key elements of interlocking devices, ensuring machines cannot operate when safety doors are open. The catalog distinguishes between type 1 and type 2 safety switches, with type 1 using coded actuating elements and type 2 requiring special coded actuators.

Technical Specifications: The catalog includes detailed technical specifications for various safety switch types, including those with guard locking and monitoring features. It provides information on mechanical release, solenoid operating voltage, switching elements, and connection options.

Specifications: The safety switches are designed with positively driven contacts that ensure reliable opening even if contacts are welded. They are available with straight and hinged actuators suitable for different door types. The switches comply with EN 60947-5-1 Annex K standards.

Switching Elements: The document describes single, double, triple, and quadruple switching elements, each with independent contacts. Switching elements are categorized into slow-action and snap-action types, with slow-action being more common in safety applications.

Positively Driven Contacts: These contacts ensure reliable separation, even if welded, and are crucial for safety tasks. Dual-channel designs enhance safety by providing redundancy.

Guard Locking and Monitoring: Guard locking prevents unintentional door opening during hazards. Monitoring contacts indicate the position of the guard locking solenoid and the guard itself. The TP, STA, STP, and STM series include guard locking features.

Protection Against Tampering: Safety switches are designed to prevent bypassing, with actuators positively mounted on guards and secured with safety screws. Lockout bars are available to prevent unintentional guard closing.

Housing and Material: The switches feature a durable fiberglass reinforced thermoplastic housing, with options for metal actuating heads for increased load capability. They offer protection up to IP 67.

Installation and Adjustment: Safety switches can be installed in any position but must be securely attached to prevent movement. Actuating heads can be adjusted in 90° steps to match the required direction.

Electrical Connection: The switches support modern wiring concepts with plug-in connections for easy replacement and reduced downtime.

Operation Principles: The document explains the operation of STM and TP/STA/STP series switches in different states: door open and not locked, door closed and not locked, and door closed and locked, highlighting the role of the locking arm and solenoid in ensuring safety.

Failsafe Locking Mechanism: This mechanism ensures that the locking mechanism cannot engage if the guard is open, preventing accidental locking and ensuring safety.

BiState and Twin Versions:

BiState Version: Maintains the guard locking pin in its position during power failure, preventing accidental entrapment.
Twin Version: Allows simultaneous monitoring and locking of two movable guards.

Selection Table: The document includes a selection table for different safety switch configurations, detailing actuating elements, connection types, housing options, and switching elements.

Wiring Diagrams and Dimension Drawings: Detailed diagrams are provided for each switch type, illustrating the wiring and physical dimensions for installation and operation.

Procedures:

Installation: Safety switches can be mounted according to DIN EN 50047 standards or with 40 mm spacing. The approach direction is adjustable in 90° steps both horizontally and vertically.
Ordering: Actuators must be ordered separately, with specific order numbers provided for each configuration.

Norms and Standards:

Mounting and connection specifications adhere to DIN EN 50047 standards.

Recommendations:

Ensure correct actuator ordering as per the specified pages for compatibility.
Consider optional plug connectors for enhanced connectivity.

Key Data from Tables:

Ordering Table: Lists series, actuator type, connection, housing, switching element, and order numbers.
Selection Table: Provides options for different safety switch types, including NP, GP, and SGP, with details on connection types and switching elements.

Critical Information:

Ensure the correct torque (M=0.6Nm) is applied during installation.
Actuators and plug connectors must be ordered separately, with references to specific pages for detailed information.

Key Features:

Adjustable approach direction in 90° steps for both horizontal and vertical orientations.
Increased horizontal overtravel for enhanced operational flexibility.
Optional LED indicators for operational status monitoring.

Ordering Information: Detailed tables provide ordering codes for different configurations, including mechanical and electrical versions, with specific actuator and connector options.

Additional Features:

LED Indicators: Optional function displays for operational status.
BI-State Function: Prevents unintentional locking during power failures.

Diagrams and Drawings: Includes dimension drawings and wiring diagrams for various configurations, illustrating actuator insertion and locking mechanisms.

Hinged Actuators: Hinged actuators are recommended for door radii less than 1,000 mm to prevent damage from jamming. They are available for doors hinged on the left/right (P-LR) or top/bottom (P-OU) with overtravel options of 2 mm and 7 mm. Each actuator includes safety screws for secure installation.

Straight and Bent Actuators: These actuators are suitable for different tensile forces and door configurations. Straight actuators are used for sliding or hinged doors with radii greater than 300 mm, while bent actuators are suitable for lower tensile forces. Both types come with or without rubber bushes and include safety screws.

Insertion Funnels and Adapters: Insertion funnels ensure reliable actuator insertion into the actuating head, protecting the safety switch from mechanical influences. They are not compatible with certain safety switches and require specific actuators with long overtravel. The NP-K adapter is used for top entry overtravel applications.

Mounting Plates and Brackets: Mounting plates are used for vertical and horizontal installation of safety switches and actuators. They are made of galvanized St37 material. Mounting brackets are available for NM and NP series safety switches.

Plug Connectors: The document details M12 and SR series plug connectors, including straight and angled versions. These connectors are available with various pin configurations and cable lengths. Coding shells ensure only matching connectors can be mated.

Ordering Information: Each section includes an ordering table with designations, versions, minimum door radius requirements, packaging units, and order numbers for easy reference.

Specifications and Materials: The document details various types of screws and bolts used in actuator series NM, NP, GP, and TP. The screws are primarily made of stainless steel and are available in different sizes such as M4x14, PL3x26, and PL3x30. Replacement screws are packaged in units of 100 pieces.

Bolts for Safety Switches: The document describes bolts designed for safety switches used in doors hinged on the right or left. These bolts are easily fitted to standard aluminum profiles and machine covers. They feature a distinctive yellow color for easy recognition and include a detent mechanism to prevent unintentional opening. Some bolts also allow for the attachment of padlocks.

Special Features: Certain bolts, such as those in the TP-AF and TP-CF series, include a lever for escape release from the danger zone. These bolts latch in the open position to prevent unintentional closing and are unlocked by pulling the detent knob upward.

Ordering Information: The document provides detailed ordering tables for various bolts and accessories, including order numbers and descriptions of the detent mechanisms and versions available.

Plug Connectors and Accessories: A list of plug connector suppliers is provided, along with details on crimp and extraction tools for various plug connectors. The document notes that the data was valid as of October 2004 and that manufacturers reserve the right to make changes without notice.

Technical Specifications Overview:

General Specifications:
- Ambient Temperature: -20 to +80 °C
- Weight: Approx. 0.32 kg
- Approach Speed: Max. 20 m/min
- Actuating and Extraction Force: 25 N
- Retention Force: 10 N
- Insertion Depth: Actuator S standard, Lateral approach direction (h) 24.5 + 5 mm, Approach direction from above (v) 24.5 + 5 mm

Safety Switch SGA:
- Reliability: B10d 3 x 10⁶ operating cycles
- Connection: M20 x 1.5, Screw terminal
- Degree of Protection: IP 67
- Rated Insulation Voltage: Ui 250 V AC/DC
- Rated Impulse Withstand Voltage: Uimp 2.5 kV
- Conventional Thermal Current: Ith 4 A
- Short Circuit Protection: 4 A gG
- Utilization Category: AC-15 Ie 4 A Ue 230 V, DC-13 Ie 4 A Ue 24 V
- Switching Principle: Slow-action switching contact
- Contact Material: Silver alloy, gold flashed

Connection Types:
- Plug Connector SR11: 11-pin + PE, IP 65, Ui 50 V AC/DC
- Plug Connector M23 (RC18): 18-pin + PE, IP 65, Ui 110 V AC/DC
- Plug Connector SM8 (M12): 8-pin, IP 65, Ui 30 V AC/DC
- Plug Connector BHA12: 12-pin, IP 65, Ui 50 V AC/DC

Safety Switch TP with Guard Locking:
- Reliability: B10d 3 x 10⁶ operating cycles
- Locking Force: Max. 1,300 N
- Solenoid Operating Voltage: AC/DC 24 V, 110 V, 230 V
- Power Consumption: 8 W

Safety Switch STP with Guard Locking:
- Reliability: B10d STP 5 x 10⁶, STP-BI 2 x 10⁶ operating cycles
- Locking Force: Max. 2,500 N
- Solenoid Operating Voltage: AC/DC 24 V, 110 V, 230 V
- Power Consumption: 8 W

Switching Functions:
- Various configurations for door monitoring and unlock request contacts, with different combinations of normally closed (NC) and normally open (NO) contacts.

Note: All technical data are subject to modifications and no responsibility is accepted for the accuracy of this information.

Technical Specifications:
1. Materials and Construction: The housing is made of reinforced thermoplastic, while the actuating head is die-cast aluminum with a stainless steel cam.
2. Mechanical Life: The switches have a mechanical life of 1 x 10⁶ operating cycles.
3. Temperature and Weight: Operates in ambient temperatures from -20 to +55 °C and weighs approximately 0.62 kg.
4. Forces: Actuating force is 35 N, extraction force (not locked) is 30 N, and retention force is 20 N.
5. Locking Forces: Maximum locking force is 2,500 N from both top and side approaches.

Switching Functions:
1. Switch Types: Various types including STP-TW, STA, STM, and TK with different configurations of normally closed (NC) and normally open (NO) contacts.
2. Switching Principle: Utilizes slow-action switching contacts with a minimum switching current of 1 mA at 24 V DC.
3. Contact Material: Made from silver alloy, gold flashed.

Guard Locking and Monitoring:
1. Solenoid Operating Voltage: 24 V AC/DC with a duty cycle of 100% and power consumption of 8 W.
2. Locking Force: Varies by model, with some models offering up to 5,000 N.

Connections and Protection:
1. Cable Entry: M20 x 1.5 screw terminal with a connection cross-section of 0.34 to 1.5 mm².
2. Degree of Protection: Rated IP 67 according to IEC 60529.
3. Rated Insulation Voltage: 250 V AC/DC with an impulse withstand voltage of 2.5 kV.

Reliability and Standards:
1. Reliability Values: B10d values range from 2 x 10⁶ to 11.5 x 10⁶ operating cycles depending on the model.
2. Compliance: Meets standards such as EN ISO 13849-1 and IEC 60947-5-1.

Accessories:
1. Connectors: Various types including M12, M23, and SR series with different pin configurations and protection ratings.
2. Built-in LED: Operates at 24 V DC with a current consumption of 45 mA.

Glossary:
1. Actuating Force: Defined as the minimum force required for a switching operation.
2. Approach Speed: The speed at which a switch can be mechanically actuated, dependent on the actuating element's shape and material.

Overview: This document provides detailed technical information on safety switches, focusing on their design, operation, and compliance with safety standards. It covers various aspects such as mechanical and electrical guard locking, safety categories, and risk assessment.

Specifications: The document outlines the mechanical guidance of the actuator by the bolt tongue, which is crucial for the safety switch's operation. It also describes the closed-circuit and open-circuit current principles for guard locking, emphasizing the importance of maintaining a safe state.

Procedures: Key procedures include the mounting of safety switches to prevent easy bypassing, the use of enabling switches for safe operation, and the necessity of testing to ensure system functionality. The document also highlights the importance of escape release mechanisms for unlocking guards from within danger zones.

Standards and Norms: Compliance with EN ISO 13849-1 and EN 61508 is emphasized for assessing safety-related parts and determining the Safety Integrity Level (SIL). The document also references EN 60947-5 for safety switch compliance and EN 60204-1 for stop categories.

Recommendations: Recommendations include using diversity and redundancy to enhance safety, ensuring that safety switches cannot be easily tampered with, and conducting regular testing as per risk analysis requirements. The document advises on the use of safety relays and position switches for effective safety management.

Key Concepts: Important concepts discussed include the degree of protection (IP rating), locking force, retention force, and the role of safety relays in evaluating switchgear. The document also explains the significance of positive actuation and positively driven opening force.

Risk Assessment: The document outlines the risk assessment process as per EN ISO 12100, which involves risk analysis and evaluation to determine the required safety category. It stresses the importance of maintaining a safe state to prevent hazardous situations.

Document Overview: This document appears to be a technical catalog or parts list, detailing various components, their order numbers, and corresponding page numbers. It includes a wide range of items such as actuators, adapters, latches, bolts, and other mechanical and electronic components.

Key Sections:

Specifications: The document lists numerous components with specific order numbers and page references. Each item is likely associated with detailed specifications on the referenced pages.
Procedures and Standards: While not explicitly detailed in the provided text, the document likely includes installation or usage procedures and standards for each component, given the technical nature of the content.
Contact Information: The document provides contact details for EUCHNER representatives in various countries, including Germany, Austria, Benelux, Brazil, Canada, and China. This section is crucial for customer support and inquiries.

Critical Information:

Order Numbers: Each component is associated with a unique order number, which is essential for identification and procurement.
Page References: The page numbers next to each item suggest where detailed information can be found, which is critical for users needing specific data or instructions.
Technical Modifications Disclaimer: The document includes a disclaimer about potential technical modifications and the accuracy of the information, indicating that users should verify details before proceeding with orders or installations.

Summary: This document serves as a comprehensive index for technical components, providing essential information for ordering and technical support. It is structured to facilitate easy navigation and quick access to detailed specifications and contact information for further assistance.

Catalog excerpts

Safety Switches with Plastic Housing

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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 look...

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About this catalog 4 How can I find the right switch? 4 Function and technology used in safety switches 5 Safety switches type 1, plastic housing 13 Safety switches type 2, plastic housing 21 Safety switches NM..VZ 21 Safety switches SGA, metal housing 39 Safety switches TP with guard locking and guard locking monitoring 43 Safety switches STP with guard locking and guard locking monitoring 61 Safety switches STA with guard locking and guard locking monitoring, metal housing 75 Safety switches STM with guard locking and guard locking monitoring 83 Safety switches...

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General About this catalog The Safety Switches with Plastic Housing catalog gives you an overview of our safety switches and our rope pull switches. For numerous applications these switches are the right choice due to their economy and flexibility. 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. You...

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General EUCHNER Standards and approvals 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 DIN EN 60947-5-1 (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 with the applicable laws and therefore with...

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General 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 Triple switching element with three independent switching contacts Quadruple switching element with four independent switching contacts Safety switch type 1 with rounded plunger Switching contact 2 Safety switches type 2 On safety switches type 2, the actuating element for the switch is coded. The actuating elements are available in various versions to suit the guard that is to be monitored. This...

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General Monitoring contacts 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. No snap-action switching elements are available for the safety switches in this catalog. Door monitoring contact and interlocking solenoid monitoring contact In addition to the safety contacts, monitoring contacts are also required, for example, to indicate the position...

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General This feature guarantees protection for anyone (e.g. maintenance or service personnel, or cleaning staff) who needs to enter potentially hazardous areas. The switches cannot signal a safe (closed) state with a lockout bar fitted. As a result unintentional starting of the machine is not possible. Guard locking Safety switches type 2 are available both with and without guard locking. Guard locking is a feature that prevents the unintentional opening of a door as long as there is a hazard. The door is locked by preventing the removal of the actuator from the safety switch. The series TP,...

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General Changing the switching direction Switch head Actuator Guard locking solenoid In addition, in the case of the NM.HB series, the actuating direction can be adjusted such that the actuator only switches in one direction. Rotate the actuating element Simultaneously press and rotate the washer Principle of operation of STM The sectional drawings show the safety switch STM in its three switch states: ᕡ Door open and not locked -90° Left switching Left / right switching (default setting) In the initial state (actuator removed/guard open) all positively driven contacts (SK and ÜK) are open. The...

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General ᕣ Door closed and locked After the actuator has been inserted, it is possible to activate the switch’s guard locking. If the guard locking solenoid is activated, the locking arm locks the plunger and actuates the switching element ÜK. The contacts 11-12 are closed on this switching element. The contacts 11-12 on the switching element SK continue to remain closed. In this position the positively driven contacts 11-12 on the two switching elements SK and ÜK are safely locked, the monitoring contact 23-24 is open. The actuator and the guard are locked. This means that the machine connected...

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General ᕣ Door closed and locked After the actuator has been inserted, it is possible to activate the switch’s guard locking. When the guard locking solenoid is activated, NO contact 33-34 is opened and signals the condition Locked. The NO contact 1314 signals the condition Door closed as before. The positively driven contacts 21-22 and 41-42 were closed when the guard locking solenoid was activated. The actuator and the guard are locked. This means that the machine connected to the safety circuit can be started. Door closed and locked The first guard locking pin is released by inserting the...

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Safety Switches with Plastic Housing

Safety Switches with Plastic Housing

Catalog excerpts

All EUCHNER GmbH + Co. KG catalogs and technical brochures