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SRB-E-322ST - Emergency Stop Dual-Contact Relay - SS IP65 SIL3 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-322ST is a dual-circuit safety relay module engineered for simultaneous monitoring of two independent safety circuits (e.g., E-stops and guard doors). Featuring a stainless steel housing (IP67 rated), this DIN-rail mountable device achieves ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3 compliance. Its dual-channel architecture utilizes force-guided contacts to guarantee safe-state switching during internal faults. Operating at 24V DC within -25°C to +60°C, the relay withstands oils, vibrations (50g shock resistance), and high humidity. Integrated multicolor LEDs provide status diagnostics for both circuits independently. The compact 45mm width enables high-density panel installations in robotics, automotive, and heavy machinery safety systems.
2. Key Technical Parameters
- Safety Ratings:
- SIL 3 (PFHD: 2.5×10⁻⁹/h), PL e (DCavg=99%)
- Electrical Specifications:
- Supply Voltage: 24V DC ±10% (19.2–28.8V)
- Safety Outputs: 4× relay (6A @ 250V AC) + 2× semiconductor (0.5A)
- Independent Input Circuits: Dual-channel × 2 (S11/S12, S21/S22)
- Response Time: ≤80ms per circuit
- Mechanical:
- Dimensions: 45×100×121mm (W×H×D)
- DIN Rail: EN 60715 TH35
- Environmental:
- IP67 (NEMA 4X equivalent)
- Chemical Resistance: Resists oils/coolants
- Diagnostics:
- 6 LEDs (power/status/fault per circuit)
- Fault memory: Last 5 events
- Certifications:
- UL 508, CE, IECEx Ex ec IIIC T80°C Dc
3. Primary Applications
This relay consolidates safety monitoring for:
- Automotive Press Lines: Coordinated E-stop + light curtain monitoring
- Robotic Cells: Simultaneous safety gate + speed monitoring inputs
- Packaging Machinery: Dual guard door interlocks for filler/capper zones
- CNC Machining: Tool changer guard + E-stop circuit integration
- Plastic Injection: Mold guard + hydraulic lock monitoring
- AGV Systems: Emergency stop + bumper switch redundancy
- Pharmaceutical Isolators: Gloveport + door position verification
- Conveyor Systems: Safety mat + light curtain synchronization
Its dual-circuit design reduces wiring by 40% versus separate relays while maintaining SIL 3 isolation between critical functions.
4. Functional Advantages
- Redundant Safety Architecture:
- Physically isolated circuits prevent cross-fault propagation
- Force-guided contacts guarantee ≥0.5mm separation
- Diagnostic Precision:
- Independent LED indicators per circuit (green=OK, red=fault)
- Output semiconductor signals fault conditions
- Space Optimization:
- 45mm width replaces two conventional relays
- Unified DIN rail mounting simplifies installation
- Flexible Reset Logic:
- Configurable auto/manual reset per circuit
- External reset button compatibility
- Durability:
- Vibration-resistant stainless housing
100,000 mechanical cycles
- Compliance Efficiency:
- Pre-validated templates for ISO 13850/EN 60204-1
- SILCL 3 certification per IEC 61508
5. Safety Operation & Diagnostics
Circuit Monitoring Logic:
- Dual-Channel Validation:
- Continuously compares Sx1/Sx2 inputs (>5ms discrepancy = fault)
- Startup test verifies contact separation
- Failure Mode Coverage:
- Welded contacts force NC open via mechanical linkage
- Undervoltage lockout below 18V DC
- Output Control:
- Relays (K1/K2 for Circuit 1, K3/K4 for Circuit 2) enable machines
- Auxiliary semiconductors (OUT1/OUT2) signal circuit status
Diagnostic Indicators:
| LED | Circuit 1 | Circuit 2 |
|---|---|---|
| Power | Green (both circuits) | |
| Status | Green = inputs valid | Green = inputs valid |
| Fault | Red = discrepancy/fault | Red = discrepancy/fault |
Response Performance:
- Fault detection → Output shutdown: ≤60ms
- Contact break distance: Guaranteed ≥0.5mm
- Automotive E-stop compliance: EN ISO 13850 stop category 0
| Parameter | Specification/Value |
|---|---|
| Product Type | Compact Emergency Stop Switch (Twist Release) |
| Series | SRB-E Standard Series |
| Actuator Diameter | Ø 30 mm Mushroom Head (Red/Yellow per ISO 13850) |
| Contact Configuration | 2 NC (Safety) + 1 NC/1 NO (Aux) (Terminals: 13-14/21-22/31-32) |
| Safety Performance | Cat. 4 / PL e (EN ISO 13849-1) Stop Category 0 (EN/IEC 60204-1) |
| Enclosure Protection | IP65 (Front face) IP54 (Housing rear) |
| Electrical Ratings | Max. Voltage: 250V AC/300V DC Rated Current: 10A AC-15 / 6A DC-13 |
| Mechanical Life | ≥ 1,000,000 cycles (No load) |
| Electrical Life | 100,000 cycles (At rated load) |
| Actuation Force | ≥ 80 N (ISO 13850 compliant) |
| Release Mechanism | Key-operated Twist Release (Anti-rotation collar) |
| Housing Material | Thermoplastic (PA 66) UV-resistant, halogen-free |
| Contact Material | AgNi Alloy (Silver Nickel) |
| Impact Resistance | 500 N (Frontal impact per EN 60068-2-75) |
| Operating Temperature | -25°C to +70°C |
| Connection | Screw Terminals (Max. 2.5 mm²) Labeled contacts |
| Mounting | Panel Cutout: Ø 22.5 mm Depth: 64 mm |
| Safety Features | • Positive Opening NC contacts • Mechanically linked dual safety circuits |
| Certifications | CE, UL 508, CSA C22.2 No.14, TÜV, EAC, CCC |
| Compliance Standards | EN/IEC 60947-5-1, EN ISO 13850, EN 60204-1 |
| Actuator Locking | Requires key rotation for reset (Tamper-resistant) |
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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