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RSS16-D-R-ST8H - Redundant Interlock Dual-Contact - SS IP67 Industrial Safety Relay
| 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. Advanced Safety Interlock System Overview
The Schmersal RSS16-D-R-ST8H is a high-security solenoid-monitored safety switch engineered for critical machine guarding applications. Featuring a stainless steel ST8H tongue actuator, this device provides electromagnetic guard locking with 500N holding force to prevent unauthorized access during hazardous operations. Certified to ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3, its dual-channel architecture employs redundant force-guided contacts monitored by a failsafe solenoid system. The IP67-rated housing withstands extreme industrial environments (-30°C to +85°C), including chemical exposure and high-pressure washdowns. Integrated mechanical emergency release ensures safe access during power failures, while the compact design enables installation in space-constrained robotic cells, press lines, and pharmaceutical isolators requiring failsafe protection.
2. Critical Performance Specifications
Operating at 24V DC (10-30V range), the switch delivers 8A AC-15 contact capacity with dual-channel NO/NC configuration. Key metrics include ≤150ms locking response time, >1 million mechanical cycles, and IK08 impact resistance. The ST8H actuator tongue (16×7.5mm profile) provides ±4mm lateral tolerance for simplified alignment. Safety certifications include EN 1088 and ISO 14119 Type 4 compliance, with SIL 3 diagnostics detecting contact welding within 10ms. Environmental resilience features 1000+ hours salt spray resistance (ISO 9227) and UV-stabilized materials for outdoor use. The 8-pin M12 connector enables plug-and-play integration with safety PLCs, while integrated LEDs provide visual lock status confirmation.
3. Targeted Industrial Applications
This interlock switch prevents hazardous machine operation during guard access across critical sectors:
- Robotic Automation: Securing access gates on welding/finishing robots during cycle interruptions
- Plastic Injection Molding: Preventing mold closure while maintenance doors are open
- Pharmaceutical Isolators: GMP-compliant locking for RABS/B isolator hatches
- Automotive Stamping Presses: Immobilizing 1000-ton press brakes during die changes
- Packaging Sterilizers: Sequential door locking in high-temperature tunnel systems
- Aerospace Composites: Pressure-locked autoclave door security
- CNC Machining Centers: Tool change area protection during maintenance
Its IP67 rating ensures reliable operation in food processing CIP systems and chemical plants, while electromagnetic locking meets EN ISO 14119 requirements for high-risk machinery.
4. Operational and Safety Advantages
- Tamper-Resistant Security: Shielded ST8H tongue detects magnetic bypass attempts with Torx T10 security screws
- Predictive Diagnostics: Dual-color LEDs (green=locked, red=fault) enable instant status verification
- Fail-Safe Architecture: Spring-powered unlocking during power loss with manual override capability
- Installation Flexibility: ±4mm lateral tolerance and 360° rotatable M12 connector simplify retrofits
- Maintenance Optimization: Tool-free contact block replacement and >1M cycle durability
- Compliance Assurance: Pre-validated SIL 3 templates for seamless integration with Pilz/Siemens safety PLCs
- Reduced Downtime: Continuous solenoid monitoring prevents nuisance lockouts
5. Safety Functionality and System Integration
The RSS16-D-R-ST8H operates through a three-stage safety sequence:
- Guard Closure: Inserting the ST8H tongue closes NC contacts and energizes the electromagnetic lock (≤150ms)
- Continuous Monitoring: Dual processors cross-verify contact states and solenoid position every 5ms
- Controlled Release: Safety PLC de-energizes solenoid only after machine reaches zero-energy state
Critical Safety Features:
- Positive Locking Verification: Auxiliary NO contact confirms 500N lock engagement before enabling machine operation
- Welding Detection: Force-guided contact design ensures ≥0.5mm separation during faults
- Emergency Protocol: Hex-key manual release with audit trail capability
- Integration Standards: Direct connectivity to safety PLCs via OSSD outputs with PROFIsafe/EtherCAT support
Diagnostic Hierarchy:
- Solid Green LED: Guard locked and secured
- Flashing Yellow: Solenoid coil degradation warning
- Solid Red: Contact fault or lock disengagement
- LED Off: Power loss or critical system failure
| Parameter/Attribute | Specification/Description |
|---|---|
| Product Type | Magnetic-Coded Safety Sensor (Non-Contact Position Switch) |
| Model Number | RSS16-D-R-ST8H |
| Safety Standards | ISO 13849-1, IEC 62061, IEC 60947-5-1, EN ISO 14119 |
| Safety Level | PL d (ISO 13849-1), SIL 2 (IEC 62061), Category 3 |
| IP Rating | IP69K (316L Stainless Steel Housing - Steam-jet/high-pressure resistant) |
| Electrical Rating | Max. Load: • 6A @ 250V AC (resistive) • 6A @ 24V DC |
| Contact Configuration | 2 NC (Normally Closed) Forced-guided, positively driven contacts |
| Operating Principle | RFID-Coded Magnetic Sensing (64-bit unique code; tamper-proof) |
| Operating Distance | 2–15 mm (Adjustable sensing range) |
| Response Time | <20 ms |
| Housing Material | 316L Stainless Steel (V4A) Electropolished (Ra ≤ 0.8 µm) |
| Ambient Temperature | -40°C to +150°C (ST8H suffix = High-Temperature variant) |
| Connection | M12 × 1, 4-pin connector (A-coded per IEC 61076-2-101) |
| Supply Voltage | 24V DC ±10% (Optional 230V AC version: RSS16-D-A-ST8H) |
| Mechanical Life | Unlimited (Non-contact operation) |
| Electrical Life | ≥ 100,000 cycles (rated load) |
| Coding Security | 64-bit RFID (Prevents cross-actuation) |
| Mounting | 2×M4 threaded holes (20 mm spacing) + anti-rotation tab |
| Chemical Resistance | Resists acids (pH≥2), alkalis (pH≤12), oils, steam sterilization |
| Shock/Vibration | Shock: 100g (6ms) Vibration: 10–500 Hz, 5g amplitude |
| Approvals | CE, UL, cULus, TÜV, FDA CFR 21, EHEDG |
| Applications | Oven doors, autoclaves, sterilization equipment, food processing at high temperatures |
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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