NI2-Q6.5-AP6/S34 2mm Inductive Proximity Sensor IP67 Stainless Micro Industrial Switch

1. ​Dual-Channel Safety Proximity Sensor Overview​

The Turck NI2-Q6.5-AP6/S34 is a high-reliability inductive proximity sensor engineered for safety-critical industrial automation applications. Featuring a ​nickel-plated brass housing (NI2 suffix)​​ with ​M12×1 threading, this compact device delivers a ​6.5mm sensing range (Q6.5)​​ for ferrous targets. Its ​dual PNP outputs (AP6 designation)​​ provide independent normally open (NO) channels with ​cross-monitoring diagnostics​ meeting ​SIL 2/PL c safety standards​ per IEC 61508/ISO 13849. Certified for ​IP67 protection, it withstands oils, coolants, and temporary submersion (30min @ 1m depth) while operating across ​​-25°C to +70°C. The "S34" suffix specifies an ​M12 4-pin connector​ for tool-free installation. Designed for robotic cells, safety gates, and machinery guarding, this sensor enables redundant position monitoring where single-point failure could compromise personnel safety or equipment integrity in automotive, packaging, and material handling applications.

2. ​Critical Technical Specifications​

• ​Sensing Performance:
  Range: 6.5mm for steel (Fe360) ±10%
  Target: Ferrous metals ≥1mm thickness
  Repeatability: ±0.3mm
  Response Frequency: ≤1kHz
• ​Electrical:
  Outputs: 2× PNP NO (sourcing)
  Voltage: 10-30V DC
  Switching Current: ≤100mA per channel
  Connection: M12 4-pin A-coded
• ​Environmental:
  IP67 (IEC 60529)
  Temperature: -25°C to +70°C
  Shock Resistance: 30g (IEC 60068-2-27)
• ​Safety Ratings:
  SIL 2 (PFHD 1.8×10⁻⁸/h per IEC 61508)
  PL c (Cat. 3 per ISO 13849-1)
• ​Mechanical:
  Housing: Nickel-plated brass
  Thread: M12×1
  Dimensions: Ø12×40mm
  Cable: PUR 2m (oil-resistant)

3. ​Safety-Critical Industrial Applications​

This sensor excels in compact machinery requiring fail-safe monitoring:

• ​Robotic Workcells: Dual-channel safety door position verification
• ​Packaging Machinery: Redundant jam detection in conveyor systems
• ​CNC Machine Tools: Tool changer safety interlocks
• ​Automotive Assembly: Safety curtain bypass prevention
• ​Hydraulic Presses: Guard position monitoring per ANSI B11.19
• ​Material Handling: Pallet presence detection in SIL 2 systems
• ​Pharmaceutical Equipment: Stopper placement system redundancy
• ​Electronic Manufacturing: Dual PCB handling verification
  Its M12 compact design fits space-constrained areas like motor mounts or gearbox housings, while dual outputs enable safety circuits where single sensor failure could cause hazardous machine operation in press brakes or automated assembly lines.

4. ​Functional Safety Advantages​

• ​Redundant Safety Architecture:
  Cross-monitored outputs detect internal faults with >60% diagnostic coverage
  Meets architectural constraints for SIL 2/PL c systems
• ​Space Optimization:
  40mm length enables installation in tight spaces
  M12 connector saves 70% panel space vs terminal blocks
• ​Environmental Resilience:
  Nickel-plated brass resists coolants and mild chemicals
  IP67 rating withstands industrial washdowns
• ​Diagnostic Intelligence:
  Dual green LEDs indicate independent channel status
  Fault memory via output pulsing patterns
• ​Electrical Reliability:
  Reverse polarity protection (EN 60947-5-2)
  Short-circuit/overload protection per channel
• ​Compliance Efficiency:
  Pre-validated SIL 2/PL c documentation
  CE/RoHS certified

5. ​Safety Operation & Diagnostics​

​Dual-Channel Logic:

1. ​Target Detection:
   Ferrous metal enters 6.5mm range → electromagnetic field disturbance
2. ​Output Behavior:
   • Both PNP channels close (sink current) on detection
   • Independent switching enables redundancy
3. ​Cross-Monitoring:
   ASIC compares response times (discrepancy >3ms triggers fault)
4. ​Diagnostic Indicators:

   ​LED State​	​Condition​
   Solid Green (both)	Normal operation
   Flashing Green (Ch1)	Channel 1 active
   Solid Red (Ch1)	Channel 1 fault
   Off	Power loss

​Safety Response Protocol:

• Outputs force open circuit within 10ms of fault detection
• Undervoltage lockout below 8V DC
• Automatic restart after fault clearance

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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