AZM150SK-02/02RA-024 Dual Contact Redundant Interlock IP67 SS 1M Cycle Industrial Safety Switch

1. ​Product Overview​

The Schmersal AZM150SK-02/02RA-024 is an advanced safety relay engineered for high-reliability monitoring of critical emergency stop circuits and guard doors in industrial automation systems. Designed to ISO 13849-1 and IEC 62061 standards, this configurable safety module combines ​dual-channel monitoring (02)​​ with ​automatic reset functionality (RA)​​ optimized for repetitive production environments. Operating at ​24V DC (024 designation)​, it features fail-safe monitoring of safety contacts, interlocks, light curtains, and emergency stops via screw terminals. Housed in a compact 22.5mm-wide DIN rail-mountable enclosure (IP20 rated), the relay provides two ​force-guided safety outputs​ with cross-monitoring technology and integrated diagnostic LEDs for instant operational status visualization. The automatic reset capability enables machine restart without manual intervention when safety conditions are restored.

2. ​Key Technical Parameters​

Certified to ​ISO 13849-1 PL e (Category 4)​​ and ​IEC 62061 SIL 3, the relay operates at 24V DC ±20% with 6A contact capacity per safety output. Dual-channel inputs (S11/S12 and S21/S22) feature monitored short-circuit protection and automatic device testing. Safety outputs include two ​force-guided NC contacts​ rated for 250V AC/24V DC with guaranteed 0.5mm contact separation. Automatic reset functionality activates after 3±1 second safety condition stabilization. Electrical isolation exceeds 4kV between circuits, with response time ≤100ms from fault detection to shutdown. Operating temperature ranges from -25°C to +55°C with 95% non-condensing humidity tolerance. Additional features include configurable start inhibit timing (0.5-10s), cross-circuit detection, and semiconductor diagnostic outputs for PLC integration.

3. ​Primary Applications and Use Cases​

This safety relay excels in automated systems requiring minimized operator intervention:

• Robotic assembly cells with frequent access for part loading
• CNC machining centers requiring automatic restart after tool change
• High-cycle packaging lines with repetitive guard door operations
• Palletizing systems where operators regularly enter work zones
• Automated storage/retrieval systems (AS/RS) with sequenced operations
• Plastic injection molding machines needing mold area access
• Conveyor transfer stations with intermittent operator interaction
• Food processing equipment requiring washdown-compatible controls
  Its auto-reset functionality is critical for production efficiency in environments with >100 daily access cycles, while SIL 3 certification ensures compliance in automotive, pharmaceutical, and aerospace manufacturing.

4. ​Functional Advantages​

• ​Automatic Reset Efficiency: Eliminates manual reset delays - 5-7 second cycle time reduction
• ​Diagnostic Precision: Monitors contact welding (99%+ coverage), voltage dips, and cross-faults
• ​Safety Assurance: Dual-channel architecture maintains PL e with single fault tolerance
• ​Space Optimization: 22.5mm DIN rail width saves 40% cabinet space versus conventional relays
• ​Seamless Integration: Plug-in screw terminals enable wiring in <3 minutes
• ​Visual Status Indication: Tri-color LEDs show power (green), operation (yellow), fault (red)
• ​Vibration Resistance: Maintains performance at 10g/55Hz vibration (IEC 60068-2-6)
• ​Compliance Readiness: Pre-certified templates for ISO 13849-1, IEC 60204-1, ANSI B11.19
• ​Flexible Timing: Adjustable start inhibit (0.5-10s) prevents premature restarts
• ​Cross-Monitoring Security: Detects bypass attempts across safety channels

5. ​Safety Function Operation​

The relay employs three-layer safety logic:

1. ​Dual-Channel Monitoring: Continuously compares both input channels; desynchronization >20ms triggers shutdown
2. ​Auto-Restart Sequence:
   • Safety conditions must be restored >3 seconds
   • Internal diagnostics validate contact integrity
   • Start inhibit timer (user-configurable) completes before restart
3. ​Force-Guided Contact Protection: Mechanical linkage ensures >0.5mm separation during NC contact opening
4. ​Diagnostic Oversight:
   • Semiconductor output (Terminals 41-42) signals detected faults
   • LED status hierarchy prioritizes critical failures
   • Non-volatile memory stores last 5 faults
     Specialized algorithms prevent restart on bouncing contacts, while automatic testing cycles verify output circuit continuity every 50ms. When integrated with safety controllers, the device enables SIL 3-compliant architectures per EN 62061 Annex D, with diagnostic coverage exceeding 99% for dangerous failures. The auto-reset function strictly follows EN ISO 13850 requirements - it only reactivates when all monitored safety devices report normal status simultaneously after the configurable stabilization period.

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.

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