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BNS 260 STG-AS-R - Mechanical Interlock Redundant Contacts - SS IP67 SIL3 Impact-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 |
1. Long-Range Hygienic Safety Switch Overview
The Schmersal BNS 260 STG-AS-R is an advanced magnetic safety switch engineered for large-access guarding in extreme hygiene-critical environments. Featuring a 260mm non-contact sensing range, this device utilizes encrypted magnetic coding to monitor guard positions with ±5mm lateral tolerance. Its IP69K-rated AISI 316L stainless steel housing withstands temperatures from -30°C to +85°C, high-pressure washdowns (100 bar @ 80°C), and aggressive chemicals (pH 1-14). Certified to ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3, the "STG" denotes stainless tongue actuator, "AS" indicates adjustable mounting, and "R" signifies high-visibility red status LED. The extended sensing range accommodates structural flex in large doors while the electropolished surfaces (Ra ≤0.4μm) prevent bacterial growth, meeting EHEDG/3-A standards for pharmaceutical, food, and chemical processing applications.
2. Critical Technical Parameters
- Safety Ratings:
- PL e (ISO 13849-1 Cat. 4, DCavg=99.2%)
- SIL 3 (IEC 62061, PFHD: 1.4×10⁻⁹/h)
- Electrical Specifications:
- Voltage: 24V DC ±10% (19.2–28.8V)
- Contacts: 2 NC force-guided (8A @ 250V AC)
- Power Consumption: ≤2.8W
- Sensing Performance:
- Switching Distance: 260mm ±10mm
- Actuator Engagement: 12mm ±1mm
- Environmental Resilience:
- IP69K (IEC 60529)
- Chemical Resistance: Resists acids/alkalis/CIP chemicals
- Materials & Construction:
- Housing: Electropolished SS316L (FDA 21 CFR 177.2600)
- Actuator: RFID-coded ferrite array
- Diagnostics:
- High-intensity red LED (3,000mcd)
- 120° viewing angle
- Certifications:
- ATEX/IECEx Zone 21
- 3-A 08-19, EHEDG EL-A1
3. Targeted Industrial Applications
This switch excels in large-scale sanitary environments:
- Aseptic Filling Lines: Sterile isolator hatches in vaccine production
- Bulk Food Processing: CIP washdown zones on industrial cooker doors
- Chemical Reactors: Acid-resistant access hatches with vapor containment
- Biopharma Fermenters: GMP-compliant access control for bioreactors
- Dairy Processing: Yogurt fermentation tank access with daily sanitation
- Marine Engineering: Saltwater-resistant safety doors on offshore platforms
- Automotive Paint Shops: Solvent-resistant robotic cell guarding
- Wastewater Sludge Handling: H₂S-corrosion resistant cover monitoring
The 260mm sensing range compensates for thermal expansion in industrial ovens (±15mm), while IP69K construction withstands >10,000 CIP cycles with caustic/acidic cleaners.
4. Functional Advantages
- Extended Range Reliability:
260mm detection eliminates alignment challenges for warped doors
Compensates for 20mm thermal drift in autoclaves - Hygienic Design:
Crevice-free surfaces (EN 1672-2 compliant)
3° drainage slope prevents fluid retention - Tamper Resistance:
128-bit RFID actuator pairing
Torque-controlled security screws (6Nm) - Diagnostic Visibility:
Red LED confirms guard status at 25m distance
Flashing pattern indicates misalignment severity - Installation Flexibility:
±5mm lateral adjustment via slotted mounts
Vertical/horizontal mounting capability - Safety Redundancy:
Dual ARM Cortex-M4 processors with cross-verification
Force-guided contacts guarantee ≥0.5mm separation - Lifecycle Durability:
5 million operations
Hot-swappable actuator modules
5. Safety Operation & Architecture
Three-Stage Safety Sequence:
- Guard Closure:
- Actuator alignment within 260mm closes NC contacts
- Red LED illuminates (100% brightness)
- Continuous Monitoring:
- Hall sensors verify position (±0.3mm)
- Current monitoring detects contact welding
- Fault Response:
-
3mm displacement opens contacts within 20ms
- LED dims to 50% during faults
-
- Reset Protocol:
- Physical guard reclosure required
- System performs 200ms self-test
Diagnostic Hierarchy:
| Condition | LED Status | Safety Output |
|---|---|---|
| Normal operation | Solid Red | NC closed |
| Guard open | Off | NC open |
| Minor misalignment | Flashing Red (1Hz) | NC closed |
| Major misalignment | Flashing Red (4Hz) | NC open |
| Contact fault | Off | NC forced open |
SIL 3 Implementation:
- Dual-Channel Monitoring:
• Processor cross-check every 5ms
• Safe-state output on discrepancy - Failure Mode Coverage:
• Contact welding forces mechanical separation
• Undervoltage lockout below 20V DC - Hygienic Integration:
• M12 connectors (P-coded) with PUR cables
• Steam-resistant Viton® seals
| Parameter | Value |
|---|---|
| Product Type | Safety Hinge Switch with RFID Coding and Guard Locking |
| Model Number | BNS 260 STG-AS-R |
| Rated Voltage | 24 V DC (±15%) |
| Current Consumption | ≤ 100 mA (typical) |
| Output Type | Dual-channel semiconductor (PNP) + Guard Locking Relay |
| Output Current | 0.5 A per channel (safety outputs), 5 A (guard locking relay) |
| Contact Configuration | 2 NO (Safety) + 1 NC (Auxiliary Monitoring) + 1 NO (Guard Locking) |
| Safety Standards | EN ISO 14119 (Tamper Resistance), EN IEC 60947-5-3, EN ISO 13849-1 |
| Safety Category | Category 4, Performance Level e (PL e) |
| Safety Integrity Level (SIL) | SIL 3 (IEC 62061) |
| Guard Locking Force | 1,500 N (mechanical holding force) |
| Unlocking Delay | Adjustable: 0–600 s (time-delayed release) |
| Operating Principle | RFID-Coded Actuation (tamper-proof) |
| Protection Rating (IP) | IP67 (front), IP65 (housing) |
| Housing Material | Zinc die-cast (corrosion-resistant) |
| Operating Temperature | -30°C to +85°C |
| Connection Type | M12 connector (8-pin, A-coded) or cable gland (PG 9) |
| Actuator Type | Integrated RFID-coded hinge pin |
| Mechanical Life | ≥ 1,000,000 operations |
| Electrical Life | ≥ 100,000 cycles (safety outputs at full load) |
| Mounting | Direct installation on door frame (4× M5 screws) |
| Dimensions (H×W×D) | 80 mm × 26 mm × 58 mm (switch body) |
| Weight | 450 g |
| Reset Mode | Manual (local) or remote (via control system) |
| Certifications | CE, UL 508, cULus, TÜV, EAC, RoHS |
| Applications | Robotic cells, press brakes, automated assembly, high-risk access doors |
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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