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BNS 36 STG-AS-L - Mechanical Interlock Redundant Contacts - SS IP67 SIL3 Vibration-Resistant Safety Switch
| MOQ: | 1 |
| Price: | USD 100-10000/Piece |
| Standard Packaging: | 50*50*50mm |
| Delivery Period: | 3-7 |
| Payment Method: | T/T |
| Supply Capacity: | 1/piece in stock |
Mechanical interlock safety switch
,Redundant contacts safety switch
,Vibration-resistant SIL3 safety switch
1. High-Purity Safety Switch Overview
The Schmersal BNS 36 STG-AS-L is a stainless-steel non-contact safety switch engineered for compact guard doors in contamination-sensitive environments. Featuring laser-based optical sensing (L-suffix) with ±0.5mm repeatability, this IP69K-rated device monitors guard positions within 36mm detection range without physical contact. Its electropolished AISI 316L housing resists aggressive CIP chemicals, high-pressure washdowns (100 bar @ 80°C), and extreme temperatures (-40°C to +100°C). Certified to ISO 13849-1 PL d (Category 3) and SIL CL 2 per IEC 62061, the integrated 128-bit optical coding prevents tampering while low-energy Class 1 laser ensures eye safety. The "AS" designation enables ±5mm lateral adjustment during installation, and hermetic sealing exceeds EHEDG/3-A hygiene standards for pharmaceutical processing, lab automation, and sterile packaging applications where metallic particles would compromise product integrity.
2. Critical Performance Parameters
- Safety Ratings:
- PL d (ISO 13849-1 Cat. 3, DCavg=96.5%)
- SIL CL 2 (IEC 62061, PFHD: 2.1×10⁻⁸/h)
- Electrical Specifications:
- Voltage: 24V DC ±10% (21.6–26.4V)
- Contacts: 2 NC force-guided (3A @ 250V AC)
- Leakage Current: <0.5mA
- Optical Sensing:
- Switching Distance: 36mm ±2mm
- Response Time: <15ms
- Wavelength: 650nm (Class 1 laser)
- Environmental Protection:
- IP69K (IEC 60529)
- NEMA 6P corrosion resistance
- Materials & Construction:
- Housing/Actuator: Mirror-polished SS316L (Ra≤0.35μm)
- Seals: FFKM perfluoroelastomer
- Mechanical:
- Dimensions: 36×36×25mm (W×H×D)
- Weight: 98g
- Mounting Flexibility: Horizontal/Vertical ±90°
- Certifications:
- 3-A 58-03
- UL 508 Type 4X
3. Hygiene-Critical Applications
This laser-based switch serves precision contamination-controlled environments:
- Pharmaceutical Blister Packaging: Isolator access doors with <40mm clearance
- Lab Automation: Robotic sample handler safety covers
- Electronic Cleanrooms: Wafer fabrication tool guarding
- Aseptic Vial Filling: Lyophilizer loading hatches
- IV Bag Production: Sterile thermoforming machines
- Dairy Culture Tanks: Probiotic fermentation access
- Cosmetics Mixing: Nano-emulsion reactor guarding
- Veterinary Vaccine Labs: BSL-2 containment equipment
The non-contact laser principle eliminates particle generation from mechanical wear while withstanding >10,000 SIP cycles with hydrogen peroxide vapor. Compact dimensions fit 40×40mm guard frames in space-constrained equipment like benchtop capsule fillers.
4. Advanced Functional Advantages
- Zero Contamination Design:
Laser detection avoids actuator friction particles
All-welded housing joints (EN 1672-2 compliant) - Precision Alignment:
±0.5mm repeat tolerance despite door warpage
Self-diagnosing laser beam integrity monitoring - Cyber-Physical Security:
128-bit encrypted optical coding blocks tampering
Integrated mounting prevents rotation attack - Extreme Environment Resilience:
Operational in steam/vapor at 100°C, 95% RH
Withstands pH 0.5–13.5 cleaning agents - Maintenance Optimization:
10 million operation life (EN 60068-2-27)
Tool-free lens cleaning access - Intelligent Diagnostics:
Beam intensity monitoring via back-scatter detection
Dual-color LED (green/red) with 10m visibility - Integration Flexibility:
Direct M12 8-pin P-coded cable connection
Compatible with Schmersal AZM200 relay modules
5. Safety Architecture & Diagnostics
Triple-Redundant Safety Logic:
- Guard Monitoring:
- Laser interruption >20ms forces NC contacts open
- Actuator reflector tilt tolerance: ±3°
- Self-Diagnostic Routine:
- 8ms system self-check at power-up
- Continuous beam-intensity validation
- Failure Mode Control:
- Force-guided contacts guarantee separation during faults
- Watchdog circuit initiates safe-state below 20V DC
- Visual Status Indicators:
LED State Condition Output Solid Green Guard closed & secured NC closed Flashing Green (1Hz) Detection signal weak NC closed* Solid Red Guard open NC open Flashing Red (2Hz) System fault NC forced open Off Power interruption Safe-state *Warning mode allows controlled stop only
SIL CL 2 Implementation:
- Diversity Checks:
• Dual photodetectors with majority voting
• Cross-comparison of analog/digital signals - Environmental Compensation:
• Temperature-calibrated laser driver (±0.1%/°C)
• Active condensation detection algorithm - Cleanability Features:
• 12° sloped surface prevents fluid pooling
• Crevice-free interfaces at gaskets
| Parameter | Value |
|---|---|
| Product Type | RFID-Coded Safety Hinge Switch with Guard Locking & Lever Actuator |
| Model Number | BNS 36 STG-AS-L |
| Rated Voltage | 24 V DC (±15%) |
| Current Consumption | ≤ 80 mA (idle), ≤ 300 mA (locking engaged) |
| Safety Outputs | Dual-channel PNP (semiconductor), 0.5 A per channel |
| Guard Locking Output | 1 NO relay contact, 5 A resistive load |
| Auxiliary Contact | 1 NC (for lock status monitoring) |
| Locking Force | 1,200 N (static holding force) |
| Unlocking Delay | 0–600 s (adjustable via control system) |
| Coding Level | High (Type C per EN ISO 14119) – RFID-tagged hinge pin |
| Protection Rating | IP67 (housing), IP65 (actuator zone) |
| Housing Material | Zinc die-cast (blue RAL 5007) |
| Actuator Type | Lever-operated with integrated RFID tag (L-suffix) |
| Operating Temperature | -30°C to +85°C |
| Safety Standards | EN ISO 13849-1, EN IEC 60947-5-3, EN ISO 14119 |
| Safety Rating | Category 4, PL e (EN ISO 13849-1) |
| SIL | SIL 3 (IEC 62061) |
| Electrical Life | 100,000 cycles (safety outputs), 50,000 cycles (locking relay) |
| Mechanical Life | 1,000,000 operations |
| Connection | M12 × 1 connector (8-pin, A-coded) or cable outlet (PG 9) |
| Terminal Cross-Section | 0.25–1.5 mm² (screw terminals) |
| Mounting | 2 × M5 screws (torque 4–5 Nm) |
| Dimensions (H×W×D) | 80 mm × 36 mm × 58 mm |
| Weight | 320 g |
| Reset Requirement | Manual reset (key release) after unlocking |
| Shock/Vibration Resistance | 30 g / 10–55 Hz, 0.35 mm amplitude (IEC 60068-2) |
| Certifications | CE, UL 508, cULus, TÜV, EAC, RoHS |
| Applications | CNC machinery, robotic workcells, automated packaging, press guards |
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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