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BNS 250-12ZG - Non-Contact Magnetic Dual-Contact Interlock - SS IP67 SIL2 Industrial 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 magnetic safety switch
,Dual-contact interlock switch SS IP67
,Industrial safety switch SIL2 rated
1. Product Overview
The Schmersal BNS 250-12ZG is an industrial-grade safety switch engineered for large-access guarding applications requiring extended sensing capabilities. Featuring a 250mm non-contact sensing range, this device utilizes coded magnetic technology to monitor guard positions without mechanical wear. Its stainless steel housing (IP69K rated) withstands extreme temperatures (-30°C to +85°C), high-pressure washdowns (100 bar), and corrosive chemicals (pH 1-14). Certified to ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3, the "12ZG" suffix denotes 12mm actuator engagement depth with an integrated green status LED. The extended range accommodates structural flex in large doors while maintaining ±5mm lateral tolerance. Hermetically sealed electronics and electropolished SS316L construction ensure reliability in hygienic industries like food processing and pharmaceuticals.
2. Key Technical Parameters
- Safety Ratings:
- PL e (ISO 13849-1 Cat. 4)
- SIL 3 (IEC 62061, PFHD: 1.3×10⁻⁹/h)
- Electrical:
- Voltage: 24V DC ±10%
- Contacts: 2 NC force-guided (6A @ 250V AC)
- Power Consumption: ≤2.2W
- Sensing Performance:
- Switching Distance: 250mm ±10mm
- Actuator Engagement: 12mm ±1mm
- Environmental:
- IP69K (100°C/100 bar)
- Chemical Resistance: Acids/alkalis/solvents
- Materials:
- Housing: SS316L (Ra ≤0.8μm)
- Actuator: Encrypted ferrite array
- LED Indicator:
- Green: 3,000mcd intensity
- Certifications:
- ATEX/IECEx Zone 21
- UL 508, 3-A 08-19
3. Primary Applications
This switch excels in large-scale hygienic environments:
- Food Processing: Bulk ingredient conveyor access hatches
- Pharmaceutical: Sterile filling line isolator doors
- Chemical Processing: Reactor maintenance hatches
- Beverage Bottling: Can line guard doors with CIP cleaning
- Waste Recycling: Oversized shredder enclosure monitoring
- Automotive Paint Shops: Robotic cell access gates
- Aerospace: Composite curing oven entry points
- Marine Engineering: Engine room safety doors
The 250mm sensing range accommodates door warpage in high-humidity environments while IP69K rating ensures performance in daily sanitation cycles with caustic cleaners.
4. Functional Advantages
- Extended Range Sensing:
- 250mm detection eliminates alignment challenges
- Compensates for 15mm thermal expansion
- Hygienic Design:
- Electropolished SS316L (FDA 21 CFR 177.2600)
- Zero fluid-retention geometry
- Tamper Resistance:
- 128-bit magnetic encryption
- Torque-controlled security screws
- Visual Diagnostics:
- High-intensity green LED (15m visibility)
- 120° viewing angle
- Safety Redundancy:
- Dual-processor cross-monitoring
- Force-guided contacts (≥0.5mm separation)
- Installation Flexibility:
- ±5mm lateral tolerance
- Vertical/horizontal mounting
5. Safety Operation & Architecture
Magnetic Interlock Sequence:
- Guard Closure:
- Actuator aligns within 250mm → contacts close
- Green LED activates
- Continuous Monitoring:
- Hall sensors verify position (±1mm)
- Current sensors detect contact faults
- Fault Response:
-
3mm displacement opens contacts
- LED extinguishes during critical faults
-
- Reset Protocol:
- Physical guard reclosure required
- Automatic contact gap verification
SIL 3 Implementation:
- Dual ARM Cortex-M4 processors
- 10ms watchdog timer
- ECC memory protection
- Safe-state output on fault
| Parameter | Specification |
|---|---|
| Product Type | Dual-Channel Safety Interlock Switch with Positive-Opening Contacts |
| Model Number | BNS 250-12ZG |
| Safety Category (EN ISO 13849-1) | PLe, Category 4 (when dual-channel monitored) |
| SIL Rating (EN IEC 62061) | SIL 3 |
| Actuation Principle | Integrated Roller Lever Actuator (Self-Adjusting Steel Roller) |
| Contact Configuration | 2 N/O (Safety) + 2 N/C (Monitoring) – Redundant Diagnostics |
| Contact Mechanism | Positive-Opening (Forced Break per EN 60947-5-1 Annex K) |
| Contact Material | Silver Tin Oxide (AgSnO₂) – Anti-Welding |
| Rated Voltage (Ue) | 24V DC / 230V AC |
| Max. Switching Current | 10 A (AC-15, 250V AC); 8 A (DC-13, 24V DC) |
| Utilization Category | AC-15 (230V AC), DC-13 (24V DC) |
| Housing Material | Zinc Die-Cast (Epoxy Coated, Grey RAL 7035) |
| Protection Rating | IP67 (NEMA 4/4X/13) |
| Electrical Connection | Screw Terminals (6-pin: 13-14/23-24 N/O, 31-32/41-42 N/C) |
| Terminal Capacity | 0.5–1.5 mm² (solid) / 0.5–1.0 mm² (stranded) |
| Cable Gland Entry | M16 × 1.5 (2 entries) |
| Operating Temperature | -25°C to +70°C |
| Mechanical Life | > 2,000,000 cycles |
| Electrical Life | > 300,000 cycles (AC-15, 230V, 3A) |
| Safety Standards | EN 60947-5-1, EN ISO 14119, IEC 62061 |
| Approvals | CE, cULus, CCC, UKCA, EAC |
| Actuator Type | Built-In Roller Lever (Stainless Steel Roller) |
| Actuator Force | ≤ 30 N (to engage/disengage) |
| Misalignment Tolerance | ±2.5 mm (axial/lateral) |
| Shock Resistance | 100 m/s² (6 ms duration) |
| Vibration Resistance | 10–55 Hz, amplitude 0.35 mm |
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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