TES/S/45 Mechanical Interlock Safety Switch IP67 Stainless Steel Industrial Guard

1. Product Overview

​
The Schmersal TES/S/45 is a heavy-duty safety limit switch engineered for precision position monitoring in demanding industrial automation and safety-critical applications. Featuring a robust ​zinc die-cast housing​ with ​IP67 protection, this switch withstands dust, high-pressure washdowns (IP69K optional), oils, and mechanical impacts in harsh environments like foundries, automotive plants, and material handling facilities. Its defining characteristic is the ​45mm spring-loaded plunger actuator​ ("/45" suffix) with a hardened stainless-steel roller tip designed to absorb significant lateral forces and misalignment from machine cams, levers, or moving guards. As part of Schmersal's safety portfolio, it incorporates ​force-guided relay (FGR) contacts​ ensuring compliance with ISO 13849-1 safety standards. The "S" variant utilizes a threaded gland mount for ±5° angular adjustment, enabling precise alignment during installation. This device bridges position sensing and safety interlocking, providing reliable feedback while preventing hazardous machine states.

​2. Key Technical Parameters

​
Operating voltage: ​24V DC to 230V AC​ (50/60Hz)
​Contact Configuration:​​ Force-guided relay (FGR), ​1 NC + 1 NO​
​Contact Rating:​​ 10A @ 250V AC, 6A @ 400V AC, 2A @ 250V DC
​Plunger Stroke:​​ 45mm (±0.5mm) with corrosion-resistant roller tip
​Safety Ratings:​​

• ​ISO 13849-1: PL d, Category 3​
• ​IEC 62061: SIL CL 2​
• Positive opening action per EN 60947-5-1
  ​Environmental Resilience:​​
• Temperature range: ​​-30°C to +85°C​
• Shock resistance: ​100g (11ms)​​
• Vibration resistance: ​55Hz (1mm amplitude)​​
• Chemical/oil resistance (IEC 60068-2-43)
  ​Mechanical Life:​​ >1 million cycles
  ​Enclosure:​​ Zinc die-cast (IP67), optional stainless steel (IP69K)
  ​Connection:​​ M20 × 1.5 cable gland

​3. Primary Applications and Use Cases

​
The TES/S/45 excels in safety-relevant position detection across heavy industries. In ​material handling systems, it monitors crane end-stops and conveyor gate closures to prevent collisions. For ​metal processing​ (stamping presses, rolling mills), it verifies guard positions and tooling alignment, initiating emergency stops during unsafe conditions. ​Mobile machinery​ applications include agricultural equipment safety covers and construction vehicle articulation limits. In ​robotic workcells, it interlocks access gates and confirms jig positioning before automation cycles. Additional critical uses include monitoring ​railway switch points, ​packaging line guards, ​CNC machine safety doors, and ​hydraulic cylinder end-positions. Its extended plunger makes it ideal for applications needing tolerance compensation, such as uneven thermal expansion in industrial ovens or vibration-induced misalignment in mining equipment.

​4. Product Advantages and Functional Benefits​

• ​Enhanced Safety Compliance:​​ Integrated FGR contacts enable SIL 2 / PL d safety circuits without external relays
• ​Durability in Harsh Conditions:​​ Zinc housing withstands impacts exceeding 50J; IP67/IP69K resists steam cleaning
• ​Precision Misalignment Compensation:​​ 45mm roller plunger accommodates 20° angular deviation without binding
• ​Predictive Diagnostics:​​ Contact-state monitoring detects welding/sticking failures via safety controllers
• ​Reduced Maintenance:​​ >1 million-cycle rating minimizes replacements in high-duty applications
• ​Simplified Integration:​​ Angled gland mount (±5°) allows field adjustment; M20 cabling suits industry standards
• ​Fail-Safe Operation:​​ Force-guided mechanism ensures NC contacts open even during component failure
• ​Cost Efficiency:​​ Eliminates need for separate position sensors and safety relays

​5. Core Functionality and Safety Operation

​
The TES/S/45 operates through a precision mechanical-electrical interface. When a machine element depresses the 45mm plunger, it activates a positive-break mechanism that simultaneously opens the ​NC safety contact​ and closes the ​NO auxiliary contact. Crucially, both contacts are mechanically linked, ensuring synchronized movement – if the NC contact welds shut, the NO contact cannot close, generating a detectable fault. Safety controllers continuously monitor this state correlation (EN 60947-5-1 Annex K). A valid "safe" condition requires:

1. Plunger engaged → NC contact ​open​ + NO contact ​closed​
2. Plunger released → NC contact ​closed​ + NO contact ​open​
   Any deviation triggers an immediate safety shutdown. The extended stroke allows reliable actuation despite mechanical play or thermal drift, while the roller tip reduces wear by 60% versus flat actuators during repeated impacts. Automatic spring return (<100ms) ensures quick resetting after force removal. For Category 3 safety systems, this switch provides diagnostic coverage (DCavg) exceeding 90%, enabling MTTFd values >25 years when properly installed.

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.

Best Supply Brands As Following:1)Bently nevada.2)+GF+.3)Rosemount.4)ABB.5)Allen-Bradley.6)Foxobro.Good working environment, perfect team, sincere cooperation →→ Achieve u and our success !!!