TV8S 335-02Z-M20 Dual Contact Mechanical Interlock Switch IP67 Stainless Steel M20 Guard

1. ​Product Overview

The Schmersal TV8S 335-02Z-M20 is an advanced modular safety controller designed for centralized management of safety functions in industrial automation systems. This DIN-rail mounted unit (45mm width) integrates safety monitoring, logic processing, and PROFINET communication ("-M20" suffix) within a compact IP20-rated enclosure. Engineered as part of Schmersal's AZM400 safety ecosystem, it features ​20 configurable safety contacts​ (8 NC + 8 NO + 4 freely assignable) and ​semiconductor safety outputs. The controller provides dual-channel monitoring for safety devices (e.g., E-stops, light curtains, guard locks) while enabling seamless integration with higher-level control systems via PROFINET IO. Its black polycarbonate housing supports operation in ambient temperatures of ​​-25°C to +55°C, making it ideal for control cabinets requiring sophisticated safety logic and Industry 4.0 connectivity.

2. ​Key Technical Parameters​

• ​Supply Voltage:​​ 24V DC ±10%
• ​Safety Contacts:​​ 20 force-guided relays (6A @ 250V AC)
• ​PROFINET Interface:​​ Conforms to PROFINET IO V2.3 (M20-coded connector)
• ​Safety Ratings:​​ SIL 3 (IEC 62061), PL e (ISO 13849-1 Cat. 4)
• ​Cycle Time:​​ <100ms safety response, 2ms PROFINET update
• ​Diagnostic Features:​​ Per-channel LED status, 16-bit error codes via PROFINET
• ​Configuration:​​ DIP switches + software parameterization
• ​Standards:​​ IEC 62061, ISO 13849-1, UL 508, PROFIsafe certified
• ​Ambient Conditions:​​ -25°C to +55°C, 95% RH non-condensing

3. ​Primary Applications and Use Cases​

This controller serves as the central nervous system for machine safety in ​automated production lines, ​robotic workcells, and ​material handling systems. Key implementations include:

• Coordinating safety zones in automotive body shops with 50+ access points
• Managing STO (Safe Torque Off) for drive systems in packaging machinery
• Integrating safety light curtains on press brake feeding systems
• Monitoring emergency stop circuits in pharmaceutical cleanrooms
• Providing PROFINET-based safety interlocks for automated warehouse cranes
  Its network capability makes it ideal for smart factories requiring real-time safety status visibility on SCADA/HMI systems while maintaining SIL 3 integrity.

4. ​Product Advantages and Functional Benefits​

• ​Network Integration:​​ PROFINET IO enables real-time safety data transmission (≤2ms) to PLCs
• ​Centralized Diagnostics:​​ Live monitoring of all safety devices via single PROFINET node
• ​Reduced Wiring:​​ Eliminates 70% of safety circuit cabling versus relay-based systems
• ​Flexible Logic:​​ Configurable AND/OR logic gates for complex safety sequences
• ​Pre-Validated Safety:​​ SIL 3/PL e certification accelerates machine approvals
• ​Space Optimization:​​ 45mm width replaces multiple safety relays in control panels
• ​Predictive Maintenance:​​ PROFINET-transmitted diagnostics enable pre-failure alerts
• ​Global Compliance:​​ Integrated PROFIsafe protocol meets IEC 61784-3-3 requirements

5. ​Core Functionality and Safety Operation​

The TV8S 335-02Z-M20 executes safety logic through a multi-layer architecture:

1. ​Input Monitoring:​​ Dual-channel safety signals (e.g., door switches) are scanned at 10ms intervals for discrepancies
2. ​Logic Processing:​​ Programmable safety functions (enable switches, muting sequences) execute via internal FPGA
3. ​Output Control:​​ Force-guided relays and semiconductor outputs de-energize hazards within 100ms
4. ​Network Communication:​​ Safety status and diagnostics broadcast via PROFINET using PROFIsafe profile (CRC-32 protected)
   A critical innovation is its ​cross-monitoring logic​ - if an NC contact welds, the controller immediately flags the fault via PROFINET while maintaining safe operation of unaffected circuits. Manual reset (local or network-initiated) is required after fault clearance. Integration with Schmersal's Safety Designer software enables graphical configuration and simulation of safety sequences, reducing commissioning time by 40% compared to hardwired solutions. The M20 connector ensures industrial-grade network reliability in high-vibration environments.

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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