1.Product Overview​

The ​Pilz 751105 PNOZ X3.1P​ is a flexible miniaturized safety relay designed for safeguarding applications requiring ​SILCL 3 / PL e (ISO 13849-1)​​ performance. Featuring a 22.5mm width DIN-rail housing with pluggable spring-clamp terminals, it integrates ​3 independent safety channels​ with semiconductor outputs for monitoring emergency stops, light curtains, or safety gates. Operating at ​24VDC ±20%​​ with 2 safety N/O contacts and 1 auxiliary N/C contact, it supports cross-fault detection technology to prevent undetected failures. The bright red ​LED status indicators​ provide instant visual feedback for faults, power, or channel status. Fully compliant with IEC 62061 and IEC 60947-5-1 for global industrial deployment.

2.​Key Technical Specifications​

Mission-critical safety parameters:

• ​Safety Ratings: SIL 3 (IEC 62061) / PL e Cat.4 (ISO 13849-1)
• ​Max. Safety Current: 6A per channel (AC-15: 250VAC / DC-13: 24VDC)
• ​Operating Voltage: 24VDC (10.2-30V) with reverse polarity protection
• ​Response Time: <100ms (all channels)
• ​MTTFd: 175 years (EN ISO 13849-1 calculation)
• ​Diagnostic Coverage (DCavg)​: >99%
• ​Connection: Plug-in spring-clamp terminals (2.5mm² cross-section)
• ​Ambient Temperature: -25°C to +60°C
• ​Mechanical Life: >10 million operations
• ​Standards: EN 60204-1, UL 508, IEC 62061

​3.Primary Applications​

Modular machine protection solutions:

• ​Press Brakes: Two-hand control monitoring (ISO 16092 Stage III)
• ​Robotics: Collaborative cell emergency stops (ISO 10218-2)
• ​Conveyors: Belt alignment interlocking and zero-speed monitoring
• ​Packaging Machines: Rotary knife guard locking (ANSI B65.1)
• ​Plastic Injection: Mold protection barrier monitoring
• ​Automated Assembly: Light curtain muting/blanking circuits
  Ideal for upgrading legacy systems due to single-unit functionality requiring no expansion modules.

​4.Competitive Advantages​

Industry-unique safety innovations:

• ​Ultra-Compact Footprint: 55% smaller than standard relays while delivering Cat.4 safety
• ​Auto-Diagnostics: Continuous monitoring of contact welding/circuit faults
• ​Universal Voltage Tolerance: Operates down to 10.2VDC for brownout resilience
• ​Cross-Circuit Detection: Identifies wiring shorts between channels
• ​Plug-and-Play Function Blocks: Time-delay options without external timers
• ​Cost Efficiency: Replaces 3+ conventional relays in control cabinets
  Features ​internal replaceable fuses​ (500mA) and meets ISO 13855 response timing standards.

5.​Functional Capabilities​

Advanced safety monitoring technology:

• ​Forcibly Guided Contacts: Mechanically linked relays prevent unsafe states (EN 60947-5-1)
• ​Configurable Timing: 0.1s–600s time delays via rotary switches for startup/restart interlocks
• ​External Device Monitoring (EDM)​: Detects stuck outputs in linked controllers
• ​Auto-Reset / Manual Reset Options: Selectable via DIP switches
• ​Short-Circuit Protection: All outputs secured with PTC thermistors
• ​Status Feedback: Auxiliary N/C contact for PLC signaling
• ​Overvoltage Shielding: Built-in 39V surge suppression
  Includes ​manual operation button​ for contact testing and lockable terminal covers (DIN EN 62444).

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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.
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