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BDF100-20-LTBU-ST - Mechanical Interlock Dual-Contact - SS IP67 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 |
1. Product Overview
The Schmersal BDF100-20-LTBU-ST is an industrial-grade magnetic safety switch engineered for robust access control in demanding environments. Featuring a stainless steel housing (ST) with IP69K protection, this device monitors guard doors and hatches using non-contact magnetic technology. The "20" designation indicates an extended 20mm switching distance, providing exceptional installation tolerance for misaligned or warped guards. Equipped with a bright blue status LED (LTBU), it delivers clear visual confirmation of guard position even in low-light conditions. Designed to ISO 13849-1 PL d (Category 3) standards, it incorporates force-guided normally closed contacts rated for safety circuits up to 6A. Operating at 24V DC with a temperature range of -30°C to +85°C, its corrosion-resistant construction withstands high-pressure washdowns, chemicals, and mechanical impacts.
2. Key Technical Parameters
- Safety Ratings:
- ISO 13849-1 PL d (Category 3)
- IEC 62061 SIL 2
- Performance Level: PL d
- Electrical Specifications:
- Voltage: 24V DC ±10%
- Contacts: 2 NC (force-guided)
- Current Rating: 6A @ 250V AC / 8A @ 24V DC
- Mechanical:
- Housing: AISI 304 stainless steel
- Switching Distance: 20mm ±10%
- Lateral Tolerance: ±5mm
- Environmental:
- IP69K (100 bar/80°C washdown)
- Shock Resistance: 100g (IEC 60068-2-27)
- Chemical Resistance: Resists oils, acids, alkalis
- LED Indicator:
- Blue LED (LTBU): Guard closed status
- Certifications:
- UL 508, CSA C22.2 No. 14
- CE, UKCA, RoHS
3. Primary Applications
This switch excels in challenging industrial environments:
- Food & Beverage: Washdown-area guard doors in meat processing plants
- Pharmaceutical: Cleanroom access hatches requiring CIP/SIP compatibility
- Chemical Processing: Reactor maintenance doors with acid exposure
- Marine Engineering: Saltwater-resistant safety gates on offshore platforms
- Automotive: Robotic welding cell access points
- Wastewater Treatment: Sludge tank access covers in corrosive environments
- Packaging Machinery: High-humidity bottling line safety gates
- Material Handling: Conveyor system guard doors in dusty environments
Its extended 20mm sensing distance accommodates thermal expansion in oven applications and structural flex in large access doors, while IP69K rating ensures reliability in daily high-pressure cleaning cycles.
4. Functional Advantages
- Installation Flexibility:
- ±5mm lateral tolerance simplifies alignment
- 20mm sensing distance accommodates warped doors
- Corrosion Resistance:
- Stainless steel housing withstands chloride exposure
- Electropolished surface (Ra ≤0.8μm) prevents biofilm
- Visual Diagnostics:
- High-intensity blue LED visible at 20m
- 360° visibility for multi-angle monitoring
- Tamper Resistance:
- Anti-magnetic coding prevents defeat
- Torque-monitored security screws
- Safety Reliability:
- Force-guided contacts (EN 60947-5-1)
- Positive-break operation (≥0.5mm gap)
- Maintenance Efficiency:
10 million non-contact operations
Tool-free LED module replacement - Global Compliance:
- EHEDG-compliant design
- 3-A Sanitary Standard option
5. Safety Operation & Diagnostics
Magnetic Interlock Sequence:
- Guard Closure:
- Actuator aligns within 20mm of sensor face
- Magnetic field closes reed contacts
- Circuit Activation:
- NC contacts close to enable machine operation
- Blue LED illuminates
- Continuous Monitoring:
- Contact state verification via mechanical linkage
- Current monitoring detects welding precursors
- Fault Detection:
- Actuator displacement >5mm triggers shutdown
- Contact welding forces redundant contact open
- Diagnostic Indicators:
- Blue LED ON: Guard closed/secure
- Blue LED OFF: Guard open or system fault
- Intermittent flashing: Actuator misalignment
Reset Protocol:
- Physical guard reclosure required after activation
- Automatic system check upon realignment
| Parameter Category | Specification Details |
|---|---|
| Manufacturer & Model | Schmersal BDF100-20-LTBU-ST |
| Product Type | Non-Locking Safety Hinge Switch (Door position monitoring) |
| Safety Standards | ISO 14119, ISO 13849-1, EN 60947-5-1 |
| Safety Level | PL d (ISO 13849-1), SIL 2 (IEC 62061) |
| Contact Configuration | 1 N/O + 1 N/C (Positively guided contacts, EN 60947-5-1) |
| Actuator Type | ST (Plastic fork actuator for 1–3 mm door gap) |
| Locking Mechanism | None (Position monitoring only) |
| Housing Material | Zinc die-cast (Standard corrosion protection) |
| Connection Type | Pre-wired Cable (Field-installable) |
| Cable Specification | LTBU: Blue PUR Oil-Resistant Cable • Length: 2.0 m • Conductors: 4×0.25 mm² |
| Voltage Rating | 24 V AC/DC (Typical; max. 250 VAC) |
| Contact Rating | 6 A @ 250 VAC, 6 A @ 24 VDC (Resistive) |
| Protection Rating | IP67 (Dust/waterproof) |
| Operating Temperature | -25°C to +70°C |
| Position Tolerance | ±5 mm (Vertical/horizontal adjustment) |
| Mechanical Life | ≥2 million cycles |
| Actuator Engagement | ≥3 mm (Positive break travel) |
| Mounting | Integrated hinge replacement (4× M5 screws; max. door weight: 50 kg) |
| Shock/Vibration Resistance | 10 g / 55 Hz (IEC 60068-2-6) |
| Approvals | CE, cULus, TÜV |
| Key Features | • Pre-wired for rapid installation • PUR cable resists oils/coolants (ISO 1817) • Dual-channel diagnostics (N/O + N/C) • Tool-free actuator adjustment • Field-replaceable actuator |
Packaging & Shipping
Company Information
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