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ES772/2 - Dual-Contact Redundant Interlock IP67 - SS 1M Cycle 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 Euchner ES772/2 is a high-security magnetic safety switch engineered for critical access control in industrial automation. Designed to ISO 13849-1 PL e (Category 4) standards, this device features RFID-coded actuator technology to prevent tampering and defeat attempts. The system comprises a zinc die-cast switch body (IP67 rated) and a separate magnetic actuator mounted on movable guards. When the guard closes, the authenticated actuator maintains safety contacts in the safe position; opening the guard triggers immediate machine shutdown. The "2" suffix denotes dual-channel diagnostics with force-guided contacts. With an 8mm switching distance and -25°C to +70°C operating range, it withstands harsh industrial environments including washdown areas, foundries, and outdoor installations. Integrated LEDs provide visual status feedback for guard position and system faults.
2. Key Technical Parameters
- Safety Ratings:
- ISO 13849-1 PL e (Cat. 4)
- IEC 62061 SIL 3
- PLe/SIL 3 per EN ISO 13849
- Electrical Specifications:
- Voltage: 24V DC ±10%
- Contacts: 2 NC + 2 NO (force-guided)
- Current Rating: 6A @ 230V AC
- Mechanical:
- Switching Distance: 8mm ±1mm
- Lateral Tolerance: ±5mm
- Actuation Force: <5N
- Environmental:
- IP67 (switch) / IP69K (actuator option)
- Shock Resistance: 100g (IEC 60068-2-27)
- Chemical Resistance: Resists oils, coolants, UV
- Diagnostics:
- Dual-channel cross-monitoring
- LED status indicators (green/red/yellow)
- Certifications:
- ATEX II 3G Ex tc IIIC T80°C Dc
- UL 508, CE, cULus
3. Primary Applications
This switch is essential for safeguarding hazardous machinery:
- Robotic Workcells: Securing access doors to prevent entry during automated operations
- Press Brakes: Monitoring safety light curtain bypass doors with tamper-proof coding
- Plastic Injection Molding: Protecting mold area access hatches in high-temperature environments
- Automotive Assembly Lines: Guarding maintenance hatches on conveyor systems
- CNC Machining Centers: Controlling access to tool change areas
- Material Handling Systems: Securing robotic palletizing cell entry points
- Pharmaceutical Cleanrooms: Monitoring isolator doors with sterile compatibility
- Food Processing: Washdown-area safety gates (EHEDG compliant options)
Its RFID technology provides superior security where conventional magnetic switches could be defeated with external magnets, while IP67/IP69K ratings ensure reliability in environments with high-pressure cleaning or metal dust exposure.
4. Product Advantages
- Tamper-Resistant Security: Encrypted RFID prevents defeat with external magnets
- High Misalignment Tolerance: 8mm switching distance accommodates installation variances
- Diagnostic Capabilities: Dual-channel monitoring detects contact welding faults
- Visual Status Indicators: Multicolor LEDs enable instant fault identification
- Corrosion Resistance: Zinc housing withstands aggressive coolants/cleaners
- Simplified Wiring: M12 connectors reduce installation time by 40%
- Safety Compliance: Meets EN ISO 14119 Type 4 requirements
- Maintenance Reduction: Hermetically sealed contacts prevent corrosion failures
- Global Certification: ATEX/IECEx for hazardous areas (Zone 21/22)
- Lifecycle Durability: >2 million mechanical operations
5. Core Functionality
The ES772/2 operates through secure RFID authentication:
- Guard Closure:
- Actuator aligns within 8mm of switch body
- RFID chip transmits encrypted code to reader
- Valid authentication closes safety contacts
- Safety Monitoring:
- Force-guided NC contacts enable machine operation
- NO auxiliary contact confirms guard position
- Guard Opening:
- Actuator displacement breaks communication
- NC contacts positively open within 20ms
- Machine enters safe state (Category 0 stop)
- Diagnostic Oversight:
- Continuous comparison of contact states
- Contact welding forces NO signal to remain open (detectable fault)
- LED flashes red during faults
- Reset Protocol:
- Manual reset key required after guard closure
- System validates contact separation before reactivation
The RFID system uses 128-bit encryption to prevent code copying, while the 8mm operating distance accommodates thermal expansion. Safety controllers monitor both NC and NO contacts - valid states require:
- Guarded: NC closed + NO open
- Unguarded: NC open + NO closed
Deviation triggers immediate shutdown. The switch achieves SIL 3 with 99% diagnostic coverage (DCavg) and MTTFd >100 years per EN ISO 13849-1 calculations.
| Parameter Category | Specification Details |
|---|---|
| Manufacturer & Model | Euchner ES772/2 |
| Product Type | Magnetic Safety Interlock Switch (Guard Locking Device) |
| Safety Standards | ISO 14119, ISO 13849-1, IEC 62061, EN 1088 |
| Safety Integrity | PL e (ISO 13849-1), SIL 3 (IEC 62061) |
| Contact Configuration | 2 N/O + 2 N/C (Dual-channel redundant monitoring) |
| Switching Function | Positive-guided contacts (EN 60947-5-1) |
| Voltage/Current Rating | Max. 240 VAC/8 A or 24 VDC/8 A (Resistive load) |
| Guard Locking Force | 1,500 N (Mechanically locked) |
| Locking Mechanism | Solenoid-actuated magnetic lock (Fail-safe) |
| Release Options | • Electrical release (24 VDC, ≤300 ms) • Manual emergency release (Key override) |
| Actuator Type | Coded Magnet (ES-A/… series; required for pairing) |
| Coding Security | High-security (Level 4 per ISO 14119) – Prevents tampering |
| Operating Principle | • Guard closed: Lock engages automatically • Unlock only when machine is safe |
| Protective Structure | Metal housing (Zinc die-cast, IP67) |
| Environmental Rating | IP67 (Dust/waterproof) Temp. Range: -25°C to +70°C |
| Shock/Vibration Resistance | IEC 60068-2-6: 10 g (8–200 Hz), IEC 60068-2-27: 30 g (11 ms) |
| Electrical Connections | 4× M12 connectors (5-pin; A-coded) |
| Monitoring Outputs | • Safety outputs: OSSD (2 channels) • Auxiliary signals: Lock status, diagnostics |
| Response Time | ≤20 ms (Contact switching) ≤300 ms (Lock release) |
| Mechanical Life | ≥20 million cycles (Contacts) ≥1 million cycles (Locking mechanism) |
| Mounting | Surface mount (M4 screws) |
| Certifications | CE, UL, cULus, TÜV |
| Key Features | • Dual-channel diagnostics • Short-circuit monitoring • Anti-tamper coding • Manual emergency override • High corrosion resistance |
Packaging & Shipping
Company Information
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