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SRB-E-402ST - Emergency Stop Dual-Contact Relay - SS IP65 SIL2 Industrial Safety
| 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 Multi-Circuit Safety Control Overview
The Schmersal SRB-E-402ST is a high-density safety relay system engineered for complex machinery requiring comprehensive safety monitoring. Featuring a stainless steel base unit (IP67 rated) with 4 independent safety circuits, this DIN-rail mountable solution achieves ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3 compliance. Each circuit utilizes dual-channel monitoring with force-guided contacts (EN 50205 certified) to ensure failsafe operation. Operating at 24V DC ±10% within -25°C to +60°C, its corrosion-resistant housing withstands oils, vibrations (50g shock resistance), and washdown environments. The integrated OLED diagnostic display provides real-time status visualization for all circuits, while SIL 3 architecture guarantees fault-tolerant performance in automotive assembly lines, robotic cells, and large-scale packaging systems.
2. Critical Performance Specifications
This relay system operates at 24V DC (19.2-28.8V) with 4 isolated dual-channel inputs (S11/S12 to S41/S42) and 8 safety outputs (4× relay 6A @ 250V AC + 4× semiconductor 0.5A). Safety ratings include SIL 3 (PFHD 1.6×10⁻⁹/h) and PL e (DCavg=99%). The 35mm-wide base unit supports up to 6 expansion modules via 500kbps backplane communication. Key metrics include ≤80ms response time per circuit, 4kV electrical isolation between circuits, and IP67/NEMA 4X protection. Diagnostics feature a 2.7" OLED display with 128×64 resolution, event logging (2,000+ entries), and USB/Bluetooth interfaces. Certified to UL 508, IECEx Ex ec IIIC T80°C Dc, and IEC 60947-5-1 standards. Mechanical dimensions: 35×105×121mm (W×H×D).
3. Complex Industrial Applications
This system consolidates safety monitoring for large-scale automation:
- Automotive Body Shops: Coordinated E-stops across 200m conveyor systems with weld cell guarding
- Food Processing Plants: Hygienic guard monitoring for multi-zone packaging lines with CIP washdown
- Pharmaceutical Facilities: GMP-compliant isolator gloveport/hatch security in cleanrooms
- Robotic Assembly Lines: Synchronized safety zones for 10+ collaborative robot workcells
- Plastic Extrusion: Hydraulic safety, die guard, and conveyor interlocks
- Material Handling AS/RS: Integrated light curtains, safety mats, and E-stops for automated cranes
- Power Generation: Turbine hall access control with SIL 3 redundancy
- Metal Stamping Presses: Multi-press emergency stop cascading with guard lock monitoring
Its modular design replaces 12+ conventional relays while maintaining SIL 3 separation between processes.
4. Operational Excellence Advantages
- Centralized Safety Management: 80% wiring reduction versus discrete relays with hot-swappable modules
- Predictive Diagnostics: OLED display shows real-time circuit health and fault history timelines
- Flexible Logic Configuration: AND/OR gating per circuit with 0.1-60s programmable delays
- Cybersecurity Integration: Password protection and encrypted firmware updates
- Cross-Circuit Isolation: Physical separation prevents fault propagation between safety zones
- Installation Efficiency: Push-in spring terminals (0.25-2.5mm²) and pre-fabricated wiring harnesses
- Compliance Optimization: Pre-validated templates for EN ISO 13850 and ANSI/RIA R15.06
- Lifecycle Durability: >500,000 mechanical operations with gold-plated backplane contacts
5. Safety Architecture & Diagnostics
Multi-Circuit Monitoring Protocol:
- Redundant Validation:
- Dual processors cross-verify inputs within 3ms tolerance
- Automatic channel synchronization during signal drift
- Startup Self-Test:
- Validates contact separation (>0.5mm) and RAM integrity
- Checks backplane communication integrity
- Fault-Response Hierarchy:
Fault Type Response Time System Action Contact welding ≤50ms Force all affected circuits open Input discrepancy ≤60ms Isolate specific circuit Undervoltage (<18V DC) ≤20ms Global shutdown Backplane failure ≤5ms Activate fail-safe semiconductors - Diagnostic Visualization:
- Green Checkmark: Circuit operational
- Yellow Triangle: Warning (misalignment/reset required)
- Red Exclamation: Critical fault (manual reset needed)
- Blue Gear: Configuration mode active
- Reset Sequences:
- Staggered circuit restart with configurable delay (0-30s)
- RFID-enabled key reset for audited access control
Safety Output Configuration:
- Relay Outputs (K1-K8): Power contactors for machine enable
- Semiconductor Outputs (OUT1-OUT4): Diagnostic signaling to PLC
- Auxiliary Contacts: Remote reset and external alarm triggering
| Parameter | Specification/Value |
|---|---|
| Product Type | High-Current Emergency Stop Switch (Twist Release) |
| Series | SRB-E Industrial Series |
| Actuator Design | Ø 60 mm Mushroom Head Red (RAL 3000) with ISO-compliant yellow base ring |
| Contact Configuration | 2 NC (Safety) + 2 NC/2 NO (Auxiliary) • Safety: Terminals 13-14, 21-22 • Auxiliary: 31-32/41-42 (NC), 51-52/61-62 (NO) |
| Safety Level | Cat. 4 / PL e (EN ISO 13849-1) Stop Category 0 (IEC 60204-1) |
| Protection Rating | IP69K (Frontal steam/jet cleaning) IP66 (Housing rear) |
| Electrical Ratings | • Voltage: 24–600V AC/DC • Current: 15A AC-15 / 8A DC-13 • Breaking Capacity: 5000 VA / 300 W |
| Mechanical Life | ≥ 2,000,000 cycles (No load) |
| Electrical Life | 200,000 cycles (At 10A AC) |
| Actuation Force | ≥ 150 N (Heavy-duty industrial requirement) |
| Reset Mechanism | Key-operated Twist Release Stainless steel anti-tamper collar |
| Housing Material | Zinc Die-Cast (ZM 040) Epoxy-powder coated (RAL 7035 Grey) |
| Contact Material | AgSnO₂ (Silver Tin Oxide) High-breaking capacity alloy |
| Terminal Connection | Dual Screw Clamps per Contact Max. wire: 4.0 mm² Torque: 1.2–1.5 Nm |
| Operating Environment | Temp: -30°C to +80°C Humidity: ≤ 95% RH |
| Impact Resistance | IK10 (20J impact per EN 62262) |
| Mounting | Panel Cutout: Ø 30 mm Depth: 84 mm |
| Safety Features | • Positive Opening (≥5mm gap) • Dual-channel redundancy with cross-monitoring |
| Certifications | CE, UL 508, CSA, TÜV, ATEX II 3G Ex nc IIC T80°C, IECEx, EAC |
| Compliance Standards | EN/IEC 60947-5-1, ISO 13850, ANSI B11.19, NFPA 79, IECEx IEC 60079-15 |
| Vibration Resistance | 5–150 Hz (1.5mm amplitude) per EN 60068-2-6 |
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
perfectly.
we are major in PLC,Sensors,HIM,Transmitters.
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