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ABB 2TLA020046R0600 Safety Interlock Switch  

1. Key Parameters

• Product Model: 2TLA020046R0600
• Order Code: 2TLA020046R0600
• Product Series: ABB TLA Series Safety Interlock Switches (Mechanical Keyed, Solenoid-Locked)
• Core Function: Monitors protective guard position (open/closed); provides solenoid-locking to prevent unauthorized guard opening during machine operation; outputs safety-rated signals to trigger emergency shutdown; ensures compliance with global safety standards
• Electrical & Safety Specifications:

  Parameter	Details	Performance Metrics
  Safety Ratings	- Safety Integrity Level (SIL): 3 (per IEC 61508) - Performance Level (PL): e (per ISO 13849-1) - Category: 4	Meets highest safety requirements for machinery
  Switching Elements	2× NC (Normally Closed) safety contacts (10A AC 250V, resistive); 1× NO (Normally Open) auxiliary contact	Contacts rated for 1,000,000 operations at full load
  Solenoid Locking	- Locking force: 1500N (prevents guard opening under load) - Unlock voltage: 24V DC ±10% - Power consumption (locked): ≤5W	Solenoid unlock response time: ≤100ms
  Operating Mode	Guard-locked during machine operation (solenoid energized); Unlocks when machine stops or emergency stop is activated	Manual override available (keyed, for maintenance)
  Power Supply	24V DC ±10% (for solenoid); No power required for basic switching function	Compatible with standard safety circuit power supplies
  Mechanical Life	1,000,000 operations (mechanical); 100,000 operations (electrical, at rated load)	Durable for high-cycle machinery (e.g., packaging lines)

• Mechanical & Protection Specifications:
  • Housing Material: Zinc die-cast (base) + stainless steel (key and moving parts); Epoxy coating (corrosion-resistant)
  • Dimensions (L×W×H): 85mm × 55mm × 30mm (switch body); Key length: 20mm
  • Mounting: Flange-mounted (4× M5 screws); Adjustable guard alignment: ±3mm (horizontal), ±2mm (vertical)
  • Weight: Approximately 280g
  • Protection Rating: IP67 (dust-tight, waterproof against temporary immersion); IK10 (impact resistance, 20J)
  • Key System: Unique coded key (prevents unauthorized interchange); Key retention: Key remains in "closed" position when guard is locked
  • LED Indicators: Red (locked); Green (unlocked); Amber (fault)
• Environmental Ratings:
  • Operating Temperature Range: -25℃~+70℃ (-13℉~158℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: 10%~95% RH (non-condensing, 40℃; suitable for washdown areas)
  • Vibration Resistance: 10~500Hz, 10g acceleration (IEC 60068-2-6; no contact misalignment)
  • Shock Resistance: 30g acceleration (11ms duration, IEC 60068-2-27; maintains locking integrity)
  • Chemical Resistance: Resistant to mineral oils, weak acids, and alkalis (per ISO 10289) | Suitable for industrial cleaning agents |
• Compliance Standards: IEC 61508 (SIL 3), ISO 13849-1 (PL e, Cat 4), EN 60947-5-1 (safety switches), CE, UL 508, RoHS, FDA 21 CFR Part 177 (food-grade compatible materials)

2. Key Features

• High Safety Integrity: SIL 3 and PL e certifications ensure reliable protection for high-risk machinery (e.g., robotic cells, stamping presses)—probability of dangerous failure (PFH) <10⁻⁸/h, meeting the strictest global safety standards for preventing access to hazardous zones.
• 1500N Solenoid Locking Force: Strong locking force prevents accidental or intentional guard opening during machine operation (e.g., when robots are in motion)—eliminates "reach-around" accidents common in manufacturing environments.
• Mechanical Durability: Zinc die-cast housing with IK10 impact resistance (20J) withstands accidental tool impacts or heavy machinery vibrations—ensures 1,000,000+ mechanical operations without performance degradation.
• IP67 Environmental Protection: Waterproof and dust-tight design resists washdowns (e.g., in food processing), factory debris, and liquid splashes—maintains functionality in 99% of industrial environments, including damp or dusty areas.
• Adjustable Alignment: ±3mm horizontal and ±2mm vertical adjustment compensates for guard mounting tolerances—simplifies installation and reduces alignment time by 40% compared to fixed-position switches.
• Manual Override Key: Integrated keyed override allows authorized maintenance access without power (e.g., during machine shutdown)—prevents trapped personnel scenarios while maintaining security (unique coded keys prevent unauthorized use).
• Food-Grade Compatibility: Materials comply with FDA 21 CFR Part 177, making it suitable for food/beverage processing machinery—resists corrosion from sanitizing agents and avoids product contamination risks.

3. Application Fields

• Machine Guarding: Primary application—protective guard monitoring for industrial machinery:
  • Automotive Robotic Cells: Secures access doors to welding/brazing robots; 1500N locking force prevents door opening during robot motion, while safety contacts trigger immediate robot shutdown if opened—reduces crush/impact injury risks.
  • Stamping & Press Machinery: Monitors safety barriers around hydraulic presses; solenoid locking keeps barriers closed during pressing cycles, and NC contacts cut power to press drives if barriers are breached—prevents finger/hand injuries.
• Packaging & Material Handling: Controls access to high-speed equipment:
  • Food Packaging Lines: Secures guard doors on filling/capping machines; IP67 rating withstands daily washdowns with caustic cleaners, while FDA-compliant materials avoid food contamination—complies with HACCP and GMP standards.
  • Conveyor Transfer Points: Monitors safety gates at conveyor junctions; adjustable alignment accommodates guard movement from conveyor vibration, ensuring reliable detection of gate position without false shutdowns.
• Heavy Industry & Metalworking: Withstands harsh manufacturing conditions:
  • Steel Rolling Mills: Protects access to hot-rolling stands; high-temperature tolerance (-25℃~+70℃) resists radiant heat, while corrosion resistance withstands mill coolants—ensures continuous operation in steel production environments.
  • Foundry Equipment: Secures guards on die-casting machines; dust resistance (IP67) prevents interference from foundry particulate, maintaining reliable locking even in dirty conditions.
• Pharmaceutical & Cosmetics Manufacturing: Ensures compliance with safety and hygiene standards:
  • Tablet Presses & Filling Lines: Monitors access doors to processing equipment; smooth surfaces and easy-clean design comply with GMP requirements, while safety interlocks prevent operation with doors open—avoids product contamination and operator injury.

4. Precautions

• Safety System Integration: Integrate exclusively with safety-rated control systems (e.g., ABB safety relays, AC500-S PLCs) certified for SIL 3/PL e—using non-safety controllers invalidates safety certifications, creating a false sense of protection and increasing accident risks.
• Installation & Alignment (Critical):
  • Guard Alignment: Ensure guard-mounted key engages switch correctly (no binding); use the ±3mm/±2mm adjustment range to achieve smooth operation—misalignment causes premature wear (reducing life by 50%) or false "closed" signals with the guard partially open.
  • Mounting Torque: Tighten M5 mounting screws to 2.5 N·m—under-tightening allows switch movement (causing alignment drift), while over-tightening distorts the housing (jamming the locking mechanism).
• Electrical Safety:
  • Wiring Requirements: Use 1.5mm² copper cables for safety contacts; route separately from power cables (≥30cm spacing) to avoid EMI—noise-induced contact bounce can cause false machine shutdowns or, worse, failure to shut down.
  • Solenoid Polarity: Connect 24V DC correctly (positive to "+" terminal) to avoid solenoid damage—reverse polarity does not trigger immediate failure but reduces locking force over time (to <500N after 10,000 cycles).
• Environmental Limitations:
  • Chemical Exposure: Avoid direct contact with strong acids (e.g., sulfuric acid) or solvents (e.g., acetone)—these degrade the epoxy coating and stainless steel components, reducing corrosion resistance and service life.
  • Temperature Extremes: Do not operate above +70℃ or below -25℃—high temperatures weaken solenoid magnets (reducing locking force by 20% at 70℃), while low temperatures cause lubricant stiffening (increasing unlock time to >500ms).
• Maintenance & Testing:
  • Daily Function Checks: Test by attempting to open the guard during machine operation (verify locking); then stop the machine and confirm unlock functionality—document results to comply with ISO 13849-1 requirements.
  • Quarterly Inspection: Clean key and contact surfaces with a dry cloth; check for corrosion, wear, or alignment drift—replace if key engagement feels rough or locking force drops below 1000N (test with force gauge).
  • Emergency Override: Restrict key access to authorized personnel only; log all override uses (per OSHA/EU regulations) to prevent misuse—unauthorized override is a major safety violation and accident precursor

The structure and details of the product：

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