T3C 236-02Z-M20 Dual-Contact Mechanical Interlock Switch IP67 Stainless Steel M20 Industrial Guard

1. Product Overview

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The Schmersal T3C 236-02Z-M20 is a high-security electromechanical safety switch engineered for critical guard monitoring applications demanding robust tamper resistance and advanced diagnostics. Featuring a ​glass-fiber reinforced polyamide housing (IP67/IP69K rated)​, this device withstands extreme industrial environments including high-pressure washdowns, chemical exposure, and mechanical impacts up to 30J (IK08). Its defining T-shaped actuator ("236" series) requires guided access with ±3mm engagement precision, defeating common bypass attempts. The "-02Z" suffix denotes ​dual semiconductor safety outputs​ supporting Safe Torque Off (STO) functionality, while "-M20" specifies an integrated ​M12 male connector (5-pin, A-coded)​​ for tool-free installation. Certified to ISO 13849-1 PL e and IEC 62061 SIL 3, this switch provides both position monitoring and power interruption capabilities for Category 4 safety circuits. The bright yellow actuator offers visual status confirmation, and the compact design (78×40×80mm) enables installation in space-constrained areas.

​2. Key Technical Parameters​

• ​Actuator:​​ T-tongue, 48mm length × 19mm width, 60N operating force
• ​Safety Outputs:​​
  • 2 PNP semiconductor outputs (STO-capable)
  • 300mA @ 24V DC per channel
• ​Safety Ratings:​​
  • ​ISO 13849-1: PL e, Category 4​
  • ​IEC 62061: SIL 3​
  • ​EN 60947-5-3 Annex K compliant​
• ​Electrical Specifications:​​
  • Supply voltage: 24V DC ±20%
  • Leakage current: <1mA
  • Response time: <15ms
• ​Environmental Resilience:​​
  • Temperature: -30°C to +85°C
  • Shock: 100g (6ms)
  • Vibration: 10-55Hz, 1.5mm amplitude
• ​Mechanical Life:​​ >1 million cycles
• ​Connection:​​ 5-pin M12 male connector (A-coded per IEC 61076-2-101)

​3. Primary Applications and Use Cases​
This switch excels in high-risk automation scenarios requiring both access control and drive safety integration. Key implementations include:

• ​Robotic workcells:​​ Interlocking service doors while providing STO signals to robot controllers
• ​CNC machining centers:​​ Monitoring sliding guards and disabling spindle drives upon access
• ​Automated assembly lines:​​ Verifying safety gate closure before conveyor activation
• ​Packaging machinery:​​ Interrupting servo drives during jam clearance access
• ​Press brake systems:​​ Providing dual-channel guard monitoring with drive disable
• ​Pharmaceutical equipment:​​ Ensuring isolator integrity in cleanroom environments
• ​Mobile machinery:​​ Meeting ISO 13849 requirements for hydraulic power unit access
  Its semiconductor outputs are particularly valuable for modern machinery using servo/servo drives requiring integrated STO functionality without additional safety relays. The IP69K rating makes it suitable for food processing plants requiring daily high-temperature washdowns.

​4. Product Advantages and Functional Benefits​

• ​Integrated Safety Architecture:​​ Combines guard monitoring and STO functionality in one device
• ​Tamper-Resistant Design:​​ T-actuator requires guided tool access, defeating magnet bypass attempts
• ​Diagnostic Capabilities:​​ Output status monitoring detects circuit faults via control systems
• ​Reduced Wiring Complexity:​​ M12 connector enables plug-and-play installation (70% faster than terminal boxes)
• ​High Ingress Protection:​​ IP69K rating withstands 80°C/100 bar steam cleaning
• ​Space Optimization:​​ Compact design replaces conventional switch+relay combinations
• ​Maintenance Reduction:​​ Hermetically sealed contacts prevent corrosion failures
• ​Global Compliance:​​ Meets EN ISO 14119 Type 4, IEC 62061, and UL 508 standards
• ​Vibration Immunity:​​ Maintains signal integrity in mobile equipment applications

​5. Core Functionality and Safety Integration​
The T3C 236-02Z-M20 operates through a multi-layer safety architecture:

1. ​Physical Engagement:​​ When the guard closes, the T-actuator depresses to precisely 8.5mm travel
2. ​Position Verification:​​ Internal cam mechanism confirms full engagement
3. ​Safety Output Control:​​
   • Guard closed: Semiconductor outputs energize (enabling drives)
   • Guard open: Outputs de-energize within 15ms (initiating STO)
4. ​Self-Monitoring:​​ Internal diagnostics continuously check:
   • Actuator position consistency
   • Output circuit integrity
   • Supply voltage stability
5. ​Fault Response:​​ Any anomaly forces outputs to safe state (de-energized) and latches the fault
   The dual semiconductor outputs provide redundant safety paths - both must de-energize simultaneously to achieve Category 4 performance. Safety controllers monitor output status via feedback loops; discrepancy between commanded and actual state triggers system lockout. Reset requires physical guard closure and manual reset command after fault resolution. The M12 connector's gold-plated contacts maintain signal integrity through 10,000 mating cycles, while the T-actuator's glass-fiber reinforced construction withstands accidental impacts from tools or falling objects.

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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