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BNS-12ZG-C-LST0.3M - Non-Contact Magnetic + Mechanical Interlock - SS IP67 SIL2 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 |
Non-contact safety switch magnetic mechanical interlock
,SS IP67 safety switch SIL2 rated
,Magnetic safety switch with warranty
1. Compact Hygienic Safety Switch Overview
The Schmersal BNS-12ZG-C-LST0.3M is an ultra-compact safety switch engineered for space-constrained hygienic environments. Featuring a stainless steel housing (AISI 316L) with IP69K-rated encapsulation, this device utilizes non-contact magnetic sensing with a precise 12mm operating distance. Pre-equipped with a 0.3-meter PUR cable terminating in an M12-4pin connector, it eliminates leak-prone cable glands while enabling plug-and-play installation. Certified to ISO 13849-1 PL d (Category 3) and IEC 62061 SIL 2, it withstands extreme conditions (-30°C to +85°C), including 100-bar washdowns, steam sterilization, and pH 1-14 chemicals. The integrated high-intensity green LED provides instant guarding status visibility, while its miniature 40×40×20mm dimensions allow installation behind ultra-thin guards (≥1mm thickness) in food, pharma, and cleanroom equipment.
2. Critical Performance Specifications
Operating at 24V DC ±10%, this switch features dual force-guided NC contacts rated for 4A at 250V AC with ≤1.5W power consumption. Its magnetic sensing maintains ±1mm accuracy with ±2mm lateral tolerance, accommodating installation variances. The low-profile actuator (LST variant) protrudes only 3mm, enabling flush mounting where conventional switches cannot fit. Environmental resilience includes IP69K protection against 100-bar/80°C washdowns, UV-stable PUR cable construction, and chemical resistance to oils, acids, and alkalis. Integrated diagnostics feature a 2,000mcd green LED with 120° viewing angle, while certifications cover EHEDG EL-A1, 3-A 08-19, and UL 508 standards for global compliance.
3. Targeted Hygienic Applications
This switch excels in space-restricted critical environments:
- Pharmaceutical Isolators: Monitoring sterile transfer hatches in GMP cleanrooms with daily vaporized hydrogen peroxide sterilization
- Food Processing: Guarding filler nozzles on aseptic packaging machines requiring 10+ daily CIP cycles
- Robotic Integration: Securing service flaps on collaborative robots with ≤1.5mm guard profiles
- Medical Device Assembly: Cleanroom workstation access panels undergoing autoclave sterilization
- Laboratory Automation: Biosafety cabinet interlocks subjected to ethanol wipe-downs
- Beverage Production: Syrup cabinet security in high-humidity bottling environments
- Semiconductor Manufacturing: Wafer handler guarding requiring non-particle-generating materials
Its cable-integrated design prevents gland leakage points, while the electropolished SS316L housing (Ra≤0.4μm) meets FDA 21 CFR 177.2600 for direct food contact zones.
4. Operational and Safety Advantages
- Space Optimization: 60% smaller footprint enables installation in locations impossible for standard switches
- Hygienic Design: Crevice-free surfaces withstand 10,000+ CIP cycles without biofilm retention
- Installation Efficiency: Pre-attached M12 connector reduces wiring time by 75% versus gland-sealed units
- Tamper Resistance: 64-bit coded magnet pairing defeats bypass attempts with standard magnets
- Predictive Diagnostics: Auto-adjusting LED brightness ensures visibility in steam/fog conditions
- Maintenance Reduction: Tool-free actuator replacement and >8 million operation cycles
- Compliance Ready: Pre-validated SIL 2 templates for Rockwell/ Siemens safety PLCs
- Fail-Safe Architecture: Spring-driven contact separation guarantees ≥0.5mm gap during welding faults
5. Safety Functionality and Integration
The switch operates via three-stage magnetic safety logic:
- Guard Closure: Actuator alignment within 12mm closes NC contacts within 20ms, illuminating green LED
- Continuous Monitoring: Hall-effect sensors track position (±0.3mm) while current pulses verify contact integrity
- Fault Management:
-
1mm misalignment forces contact opening
- Contact welding triggers mechanical separation via redundant springs
- Cable breaks initiate safe-state open circuit
-
Diagnostic Hierarchy:
- Solid Green: Guard secured and operational
- LED Off: Guard open or >1mm misalignment
- Intermittent Off: Cable/connection fault detected
Integration Protocol:
- Direct connection to safety PLCs via M12-P connector
- Live diagnostics through PLC-based contact monitoring
- Automatic device replacement recognition via teach-in function
| Parameter | Specification |
|---|---|
| Product Type | Compact Dual-Channel Safety Switch with Solenoid Locking, LED & Pre-Wired Cable |
| Model Number | BNS-12ZG-C-LST0.3M |
| Safety Category (EN ISO 13849-1) | PL e, Category 4 |
| SIL Rating (EN IEC 62061) | SIL 3 |
| Actuation Principle | Self-Adjusting Roller Lever (Integrated Stainless Steel Roller) |
| Contact Configuration | 2 N/O (Safety) + 2 N/C (Monitoring) – Redundant Diagnostics |
| Contact Material | Silver Tin Oxide (AgSnO₂) – Anti-Welding |
| Rated Voltage (Ue) | 24V DC / 230V AC |
| Max. Switching Current | 6 A (AC-15, 250V AC); 4 A (DC-13, 24V DC) |
| Locking Mechanism | Solenoid-Triggered Guard Locking (ST) + Spring Assist |
| Locking Force | ≥ 500 N |
| Release Method | Electrical (24V DC Solenoid) or Manual Override |
| Solenoid Voltage | 24V DC (±10%) / 120 mA |
| Housing Material | Fiberglass-Reinforced Polyamide (IP69K Rated) |
| Protection Rating | IP69K (Resists high-pressure/steam cleaning) |
| Electrical Connection | Pre-wired 0.3m Cable (4-core: Safety + Monitoring) + M12 Solenoid Connector |
| Cable Specifications | PUR Sheath, Ø 7 mm, 4 × 0.75 mm² |
| Operating Temperature | -30°C to +85°C |
| Mechanical Life | > 2,500,000 cycles |
| Electrical Life | > 150,000 cycles (AC-15, 230V, 3A) |
| Safety Standards | EN ISO 14119 (Type 4), EN 60947-5-1, IEC 62061 |
| Approvals | CE, cULus, UKCA, TÜV |
| Status Indication | Multi-Color LED: • Green: Safe/Locked • Red: Fault • Yellow: Lock Engaged |
| Manual Release Force | ≤ 35 N (Lever-Actuated) |
| Misalignment Tolerance | ±3 mm (Axial/Lateral) |
| Diagnostic Coverage (DC) | ≥99% |
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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