541080 - Dual Safety Channels Start Interlock - SIL 3 Metal Industrial Safety

Product Specification

1. ​Product Overview​

The Pilz PNOZ s4 541080 is a high-performance safety relay designed for advanced emergency stop (E-stop) and guard door monitoring applications. This robust DIN-rail module features ​dual-channel contact monitoring​ with ​force-guided contacts​ certified to ​ISO 13849-1 PL e (Category 4)​​ and ​IEC 62061 SIL CL 3. Engineered for universal voltage compatibility (24-240V AC/DC), it provides reliable safety switching for machines operating in harsh industrial environments (-25°C to +60°C). The compact 17.5mm-wide housing integrates ​LED status indicators​ for real-time diagnostics and includes an ​auto/manual reset selector​ for flexible system recovery. Its screw terminal connections and IP20 rating make it ideal for control cabinet installation in manufacturing, robotics, and material handling systems where fail-safe E-stop functionality is critical.

2. ​Key Technical Parameters​

• ​Safety Ratings:
  • PL e per ISO 13849-1 (Cat. 4, DCavg=99%, MTTFd=150yr)
  • SIL 3 per IEC 62061
  • Performance Data: PFHD = 3.7×10⁻⁹/h
• ​Electrical Specifications:
  • Voltage Range: 24-240V AC/DC (auto-sensing)
  • Max Load: 6A resistive (AC1) / 4A inductive (AC15)
  • Safety Outputs: 2× N/O contacts (force-guided)
• ​Response Times:
  • Switch-off delay: ≤100ms
  • Reset time: ≤1s
• ​Mechanical:
  • Dimensions: 17.5×90×103mm (W×H×D)
  • Weight: 180g
• ​Environmental:
  • Temperature: -25°C to +60°C
  • Humidity: ≤95% (non-condensing)
  • Altitude: ≤2000m
• ​Certifications:
  • CE, UL 508, CSA 22.2 No. 14
  • RoHS, REACH

3. ​Primary Applications​

The PNOZ s4 is engineered for mission-critical safety functions:

• ​Press Brakes: Dual-channel E-stop monitoring with contactor control
• ​Robotic Cells: Safety gate interlocking with position verification
• ​Conveyor Systems: Emergency stop cord monitoring
• ​Packaging Machinery: Two-hand control systems
• ​CNC Equipment: Protective door monitoring with guard locking
• ​Automated Warehouses: AGV emergency stop circuits
• ​Plastics Injection: Mold area access control
• ​Power Presses: Light curtain integration
  Its universal voltage compatibility and SIL 3 certification make it indispensable for safeguarding hazardous machinery in automotive, aerospace, and pharmaceutical industries.

4. ​Functional Advantages​

• ​Diagnostic Intelligence:
  • Tri-color LEDs visualize circuit status (green/red/yellow)
  • Contact monitoring detects welding/faults
• ​Versatile Reset Options:
  • Selectable manual/auto reset modes
  • Key-operated reset security
• ​Installation Efficiency:
  • 17.5mm width saves panel space
  • Tool-free terminal marking
• ​Global Compatibility:
  • Wide voltage range eliminates need for converters
  • Integrated surge protection
• ​Compliance Readiness:
  • Pre-certified to ISO 13849-1 PL e
  • Compliant with EN 60204-1 Stop Category 0
• ​Lifecycle Durability:

  • 100,000 electrical cycles

  • Corrosion-resistant terminals

5. ​Safety Functionality​

The relay operates through a ​dual-channel safety concept:

1. ​Input Monitoring:
   • Cross-comparison of S11/S12 and S21/S22 contacts
   • Detects faults like contact welding within 100ms
2. ​Force-Guided Contacts:
   • EN 50205 certified mechanical linkage
   • Guaranteed contact separation ≥0.5mm
3. ​Startup Test:
   • Automatic contact verification upon power-up
   • Prevents restart with undetected faults
4. ​Output Control Logic:
   • Closed safety circuit activates K1/K2 contacts
   • Auxiliary contact (13-14) provides external signaling
5. ​Reset Protocols:
   • Manual: Requires pushbutton after fault clearance
   • Auto: Automatic reset when contacts reclose
6. ​Voltage Independence:
   • Internal rectifier handles AC/DC inputs
   • Maintains safety performance at voltage dips

​Failure Management:

• Detected fault: Forces outputs open and LED indication
• Undervoltage lockout below 20V prevents partial operation
• 200ms startup delay prevents nuisance tripping

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)Rsemount.4)ABB 5)Foxobro.Good working environment, perfect team, sincere cooperation →→ Achieve u and our success !!!