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SRB-E-232ST - 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. Product Overview
The Schmersal SRB-E-232ST is a high-performance safety relay engineered for dual-circuit monitoring in critical industrial automation systems. Featuring a stainless steel housing (IP67 rated), this DIN-rail mountable module provides ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3 compliant safety control for E-stops, guard doors, and safety sensors. Its dual-channel architecture independently monitors two separate safety circuits with force-guided contacts and integrated diagnostics. Operating at 24V DC within -25°C to +60°C, the relay withstands harsh industrial environments including exposure to oils, coolants, and mechanical vibrations. The integrated TFT diagnostic display provides real-time status visualization, while SIL 3 certification ensures fault-tolerant operation in automotive, robotics, and heavy machinery applications.
2. Key Technical Parameters
- Safety Ratings:
- SIL 3 (IEC 62061, PFHD: 2.1×10⁻⁹/h)
- PL e (ISO 13849-1 Cat. 4, DCavg=99.2%)
- Electrical Specifications:
- Voltage: 24V DC ±10% (19.2–28.8V)
- Safety Outputs: 4× relay (5A @ 250V AC)
- Input Circuits: 2 independent dual-channel (S11/S12, S21/S22)
- Response Time: ≤100ms
- Mechanical:
- Dimensions: 45×105×121mm (W×H×D)
- DIN Rail Mounting: EN 60715 TH35
- Environmental:
- IP67 (NEMA 4X equivalent)
- Shock Resistance: 50g (IEC 60068-2-27)
- Diagnostics:
- 2.4" TFT color display
- USB interface for event logging
- Certifications:
- UL 508, CE, UKCA
- IECEx Ex ec IIIC T80°C Dc
3. Primary Applications
This relay is essential for safeguarding complex machinery:
- Automotive Stamping Presses: Coordinated E-stop monitoring across multi-press lines
- Robotic Welding Cells: Simultaneous safety gate and light curtain integration
- Pharmaceutical Packaging: Isolator door and gloveport monitoring in GMP environments
- Plastic Injection Molding: Hydraulic unit safety and mold guard interlocks
- Material Handling Systems: AGV safety circuit and charging station control
- Food Processing Lines: Hygienic guard monitoring with CIP washdown resistance
- CNC Machining Centers: Tool changer and chip conveyor safety
- Power Substations: High-voltage cabinet access control
Its dual-circuit design reduces wiring complexity while maintaining SIL 3 isolation between safety functions in high-risk environments.
4. Functional Advantages
- Advanced Diagnostics:
- Color TFT display shows real-time circuit status and fault histories
- Event logging with timestamp simulation (500+ entries)
- Space Optimization:
- 45mm width consolidates two safety circuits in single module
- Unified DIN rail mounting saves 60% panel space
- Safety Redundancy:
- Physically isolated circuits prevent fault propagation
- Force-guided contacts (EN 50205 certified)
- Configuration Flexibility:
- Independent reset modes per circuit (manual/auto)
- Configurable time delays (0.1–30s)
- Durability Features:
- Corrosion-resistant SS316 housing
100,000 mechanical operations
- Integration Efficiency:
- Plug-and-play M12 connectors (optional)
- Pre-certified templates for ISO 13850
- Cybersecurity:
- Password-protected configuration
- Secure firmware updates via USB
5. Safety Operation & Architecture
Dual-Circuit Monitoring Logic:
- Input Validation:
- Continuous cross-comparison of S11/S12 and S21/S22 signals
- Detects discrepancies >3ms (contact welding/line faults)
- Startup Self-Test:
- Validates contact separation (≥0.5mm) upon power-up
- Checks processor/RAM integrity
- Output Control:
- Safety relays (K1-K4) enable only when both circuits validate
- Semiconductor outputs signal diagnostics to PLC
- Fault Management:
- Forces affected circuit outputs open during faults
- TFT display shows fault codes with recommended actions
- Reset Protocols:
- Manual reset via front button or external key switch
- Auto-reset after non-critical warnings
Diagnostic Display Codes:
| Display Icon | Condition | Action Required |
|---|---|---|
| Green Check | Normal operation | None |
| Yellow Triangle | Input discrepancy | Inspect safety devices |
| Red Circle | Critical fault | Manual reset after repair |
| Blue Hourglass | Time-delay active | Wait for cycle completion |
| Parameter | Specification/Value |
|---|---|
| Product Type | Emergency Stop Switch (Twist Release) |
| Series | SRB-E Standard Series |
| Actuator Design | Ø 40 mm Mushroom Head Red (RAL 3000) with yellow base ring (ISO 13850 compliant) |
| Contact Configuration | 2 NC (Safety) + 1 NC/1 NO (Auxiliary) • Safety contacts: Terminals 13-14, 21-22 • Auxiliary: 31-32 (NC), 41-42 (NO) |
| Safety Integrity | Category 4 / PL e (EN ISO 13849-1) Stop Category 0 (IEC 60204-1) |
| Protection Rating | IP65 (Frontal ingress protection) IP54 (Housing rear) |
| Electrical Ratings | • Voltage: 24-240V AC/DC • Current: 10A (AC-15), 6A (DC-13) • Power: 3000 VA / 180 W |
| Mechanical Durability | ≥ 1,000,000 cycles (No load) |
| Electrical Durability | 100,000 cycles (At rated load) |
| Actuation Force | ≥ 80 N (Meets ISO 13850 minimum requirement) |
| Reset Mechanism | Key-operated Twist Release Anti-rotation collar prevents tampering |
| Housing Material | Glass-fiber reinforced PA 6.6 Halogen-free, UV-stabilized |
| Contact Material | AgNi (Silver Nickel) contacts Self-cleaning design |
| Terminal Connection | Screw Clamp Max. wire size: 2.5 mm² Torque: 0.5–0.6 Nm |
| Operating Environment | Temperature: -25°C to +70°C Humidity: ≤ 93% RH (non-condensing) |
| Impact Resistance | 50 J (IK08 protection per EN 62262) |
| Mounting | Panel Cutout: Ø 22.5 mm Depth: 70 mm |
| Safety Features | • Positive Opening (EN 60947-5-1) • Mechanically linked dual-channel safety circuit |
| Global Certifications | CE, UL 508, CSA C22.2 No.14, TÜV, EAC, CCC, KC |
| Compliance Standards | EN/IEC 60947-5-1, EN ISO 13850, EN 60204-1, ANSI B11.19 |
| Vibration Resistance | 10–55 Hz (Amplitude 0.35 mm) 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
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