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SRB-E-301MC - Emergency Stop + Mechanical Interlock - SS IP65 SIL3 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. Product Overview
The Schmersal SRB-E-301MC is an advanced modular safety relay system engineered for complex machine safety applications requiring SIL 3/PL e performance. Featuring a stainless steel base unit (IP67 rated) with MC (Modular Configuration) capability, this system supports up to 5 expansion modules for monitoring E-stops, light curtains, safety mats, and guard doors. Certified to ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3, it operates at 24V DC with dual-channel diagnostics and force-guided contacts. The unit integrates tri-color LED status indicators and provides OBD (Open Board Diagnostics) via USB for real-time troubleshooting. Designed for harsh industrial environments (-25°C to +60°C), its corrosion-resistant housing withstands oils, vibrations, and high humidity, making it ideal for automotive, robotics, and heavy machinery safety systems.
2. Key Technical Parameters
- Safety Ratings:
- SIL 3 (IEC 62061, PFHD: 1.8×10⁻⁹/h)
- PL e (ISO 13849-1 Cat. 4, DCavg=99%)
- Electrical Specifications:
- Voltage: 24V DC ±10% (19.2-28.8V)
- Safety Outputs: 3× semiconductor (2A) + 2× relay (6A)
- Inputs: 4 dual-channel (S11/S12 to S41/S42)
- Response Time: ≤100ms (safety shutdown)
- Expandability:
- 5 module slots (e.g., EMG-01 for guard monitoring)
- Backplane communication: 500kbps
- Environmental:
- IP67 (base unit), IP20 (expansion modules)
- Shock: 50g (IEC 60068-2-27)
- Diagnostics:
- 3.5" TFT display (optional)
- USB interface for event logging
- Certifications:
- UL 508, CSA C22.2 No. 14
- DNV-GL marine approval
3. Primary Applications
This relay system safeguards critical processes:
- Automotive Press Lines: Cascaded E-stop monitoring across 200m lines
- Robotic Workcells: Coordinated safety zones for multi-robot systems
- Packaging Machinery: Integrated safety for filler/capper/case packer modules
- Pharmaceutical Lines: GMP-compliant isolator and gloveport monitoring
- Material Handling: AS/RS crane safety with light curtain synchronization
- Plastic Extrusion: Guard locking for die face cutters
- Energy Substations: Access control for HV cabinets
- Food Processing: Hygienic safety circuit consolidation
Its modular design reduces wiring by 60% compared to discrete relays while providing centralized diagnostics for complex safety architectures.
4. Functional Advantages
- Centralized Safety Management:
- Single unit replaces 8+ conventional relays
- Cross-monitoring between modules
- Diagnostic Intelligence:
- Event log stores 5,000+ faults with timestamps
- Real-time OBD via USB/Bluetooth (optional)
- Installation Efficiency:
- Plug-and-play expansion modules
- Pre-fabricated harnesses reduce wiring time
- Safety Flexibility:
- Configurable as AND/OR logic gates
- Timed functions (0.1-30s) for guard locking
- Durability Features:
- Gold-plated backplane contacts
- Vibration-resistant DIN rail clamps
- Compliance Optimization:
- Pre-validated SIL 3 templates
- Automatic documentation generation
- Lifecycle Benefits:
15-year design life
Hot-swappable modules
5. Safety Operation & Architecture
Core Functionality:
- Dual-Channel Monitoring:
- Continuous comparison of Sx1/Sx2 inputs
- Detects discrepancies >5ms
- Startup Self-Test:
- Validates contact separation (≥0.5mm)
- Checks processor/RAM integrity
- Modular Safety Logic:
- Safety mat input delays (EMG-01 module)
- Light curtain muting (EMG-03 module)
- Fault Response:
- Forces outputs open during faults
- Isolates faulty modules
Diagnostic Indicators:
| LED | Color | Status |
|---|---|---|
| PWR | Green | Power OK |
| RUN | Flashing | System operational |
| ERR | Red | Channel discrepancy |
| OUT1-3 | Yellow | Semiconductor output ON |
| K1-K2 | Green | Relay contacts closed |
| Parameter | Specification/Value |
|---|---|
| Product Type | Heavy-Duty Emergency Stop Switch (Twist Release) |
| Series | SRB-E Metal Clad (MC) Series |
| Actuator Diameter | Ø 60 mm Mushroom Head (Red/Yellow) |
| Contact Configuration | 2 NC (Safety Contacts) + 1 NC/1 NO (Auxiliary) |
| Safety Level | Category 4 / PL e (EN ISO 13849-1) |
| Stop Category | Category 0 (Uncontrolled stop per EN/IEC 60204-1) |
| Enclosure Rating (IP) | IP69K (Front), IP65 (Housing) - Resists high-pressure washdown |
| Rated Operating Voltage (Ue) | 24–240V AC/DC |
| Rated Current (Ie) | 10 A (AC-15), 8 A (DC-13) |
| Electrical Life | 100,000 cycles (at rated load) |
| Mechanical Life | ≥ 1,000,000 cycles |
| Actuation Force | ≥ 100 N (Exceeds ISO 13850 requirements) |
| Release Mechanism | Key-operated Twist Release (Anti-rotation design) |
| Housing Material | Stainless Steel (AISI 304) |
| Actuator Material | Thermoplastic (PA) with stainless steel collar |
| Contact Block | Thermoplastic (PA) with AgCdO contacts |
| Operating Temperature | -25°C to +70°C |
| Connection Type | Screw Clamp Terminals (Max. 2.5 mm²) |
| Mounting Style | Panel Mount (Ø 30 mm Cutout) |
| Shock/Vibration Resistance | 30 g / 10–55 Hz (EN 60068-2-6) |
| Approvals/Certifications | CE, UL 508, CSA C22.2 No.14, TÜV, IECEx, ATEX (Zone 22) |
| Safety Standards | EN/IEC 60947-5-1, EN ISO 13850, EN 60204-1 |
| Contact Separation | Positive Opening (Forced break NC contacts) |
| Shaft Seal | Triple-sealed stainless steel bearing |
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.
With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are
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