TESZ1110/S/30 Double Contact Mechanical Interlock Switch IP67 Stainless Steel Industrial Guard

1. Product Overview

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The Schmersal TESZ1110/S/30 is a rugged electromechanical safety switch designed for position monitoring and safety interlocking in demanding industrial environments. Built with a ​robust zinc die-cast housing​ rated ​IP67/IP69K, it withstands extreme conditions including high-pressure washdowns, metal dust, oils, and mechanical impacts. This model features a ​30mm roller plunger actuator ("/30" suffix)​​ with a hardened steel roller that minimizes friction and wear when engaging with machine cams, levers, or moving guards. Unlike standard switches, its core distinction lies in incorporating ​force-guided relay (FGR) contacts​ specifically engineered to comply with machinery safety directives. The "S" variant utilizes a corrosion-resistant threaded gland mount allowing ±5° angular adjustment for precise alignment. Designed as a safety component, it provides reliable position feedback while meeting fail-safe requirements for critical applications where sensor failure could lead to hazardous situations.

​2. Key Technical Parameters

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Operating within ​24V DC to 230V AC​ (50/60Hz) control voltage, the TESZ1110/S/30 features ​redundant FGR contacts​ configured as ​1 NC + 1 NO (Form Z)​. Contacts are rated at ​10A / 250V AC​ (resistive) with a breaking capacity of ​4A at 230V AC (cos φ=0.7)​​ for inductive loads. Its safety certifications include ​ISO 13849-1 Performance Level PL d (Category 3)​​ and ​IEC 62061 SIL CL 2, achieved through ​positive opening action​ and internal ​contact monitoring diagnostics. Mechanical specifications feature a ​30mm roller plunger stroke​ with 0.6N actuation force, rated for ​**>1 million mechanical cycles**. Environmental resilience includes:

• ​​-25°C to +85°C operating temperature​
• ​100g shock resistance​ (11ms duration)
• ​55Hz vibration resistance​ (1mm amplitude)
• ​Immersion protection​ (IP69K at 80°C/100 bar)
  Cable connections use ​M20x1.5 cable glands, and the contacts provide ​​<15ms response time​ with automatic reset upon plunger release.

​3. Primary Applications and Use Cases

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This safety switch is essential for critical position detection in high-risk industrial scenarios. Its robust construction makes it ideal for ​metalworking machinery​ (press brake back gauge positioning, hydraulic cylinder end-stops), ​material handling systems​ (crane trolley limit detection, automated storage door interlocks), and ​mobile equipment​ (agricultural machinery safety covers, construction vehicle articulations). It serves as a primary safety interlock on ​robotic cell access gates, ensuring automated processes halt before door opening. Other key uses include monitoring ​railway switch points, verifying ​conveyor belt alignment, and providing emergency stop confirmation in ​plastic injection molding machines. In packaging lines, it detects jammed product positions to trigger shutdowns. Particularly valuable in foundries and steel mills, it withstands thermal stress while detecting furnace door closures or transfer car positions.

​4. Product Advantages and Functional Benefits

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The TESZ1110/S/30 delivers significant operational advantages:

• ​Enhanced Safety Integrity: FGR contacts and diagnostics enable PL d safety loops without extra components.
• ​Extreme Environment Resistance: Zinc housing with IP69K rating outlasts standard switches in foundries/washdown areas.
• ​Precision Actuation: Roller plunger reduces wear from angular cam forces by >40% versus flat actuators.
• ​Maintenance Reduction: Sealed design eliminates ingress failures; >1M cycles minimize replacements.
• ​Diagnostic Transparency: Contact state mismatches alert control systems before failure (MTTFd > 25 years).
• ​Installation Flexibility: ±5° angular adjustment and M20 entries simplify retrofit installations.
• ​Fail-Safe Behavior: Force-guided design prevents dangerous NC contact welding failures.
• ​Global Compliance: Meets ISO 14119/EN 1088 for safety interlocks and IEC 60947-5-1 standards.

​5. Safety Critical Functionality

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As a safety component, the TESZ1110/S/30 operates on redundant principles. When the plunger depresses (e.g., guard closure), the NC contact opens decisively while the NO contact closes simultaneously via mechanically linked FGR modules. The control system monitors both states – a valid actuation requires NC=Open AND NO=Closed. If inconsistencies occur (e.g., NC fails to open due to welding), the diagnostic discrepancy is detected within 15ms, triggering a safety shutdown. This dual-channel monitoring provides Category 3 safety per ISO 13849-1. The 30mm roller plunger ensures reliable engagement despite mechanical wear or minor misalignment. Crucially, the automatic spring return (<0.1s) resets contacts immediately when force is removed. In mobile machinery applications, its 100g shock resistance prevents false triggering from impacts, while IP69K sealing guarantees function after submersion in cleaning fluids. The combination of robust mechanics, FGR safety design, and diagnostic monitoring creates a critical safeguard against machine hazards.

Packaging & Shipping

Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.

With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are

perfectly.

we are major in PLC,Sensors,HIM,Transmitters.

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