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SRB-E-212ST - 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-212ST is a dual-channel safety relay engineered for monitoring emergency stops and guard doors in industrial automation systems. Featuring a stainless steel housing (IP67 rated), this DIN-rail mountable device complies with ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3 standards. Its compact design (22.5mm width) incorporates force-guided contacts and dual-channel input monitoring to ensure reliable safety circuit control. Operating at 24V DC with a temperature range of -25°C to +60°C, the relay withstands oils, vibrations, and high humidity environments. Integrated LED status indicators provide real-time diagnostics for power, fault, and output states, while the corrosion-resistant construction ensures longevity in automotive, packaging, and robotic applications requiring fail-safe operation.
2. Key Technical Parameters
- Safety Ratings:
- PL e (ISO 13849-1 Cat. 4)
- SIL 3 (IEC 62061, PFHD: 3.1×10⁻⁹/h)
- Electrical Specifications:
- Supply Voltage: 24V DC (19.2–28.8V)
- Safety Outputs: 2× relay (5A @ 250V AC)
- Inputs: Dual-channel (S11/S12, S21/S22)
- Response Time: ≤100ms
- Mechanical:
- Dimensions: 22.5×100×114mm (W×H×D)
- DIN Rail Mounting: EN 60715
- Environmental:
- IP67 (IEC 60529)
- Shock Resistance: 30g (IEC 60068-2-27)
- Diagnostics:
- Tri-color LEDs (power/fault/output status)
- Automatic fault memory
- Certifications:
- UL 508, CE, UKCA
- RoHS, REACH compliant
3. Primary Applications
This relay safeguards critical machinery across industries:
- Press Brakes: Emergency stop monitoring with manual reset
- Robotic Workcells: Safety gate interlocking for collaborative robots
- Conveyor Systems: Integration with light curtains and safety mats
- Packaging Machinery: Two-hand control system enforcement
- CNC Machining Centers: Tool changer area guard monitoring
- Plastic Injection Molding: Mold access door security
- Automotive Assembly: Stamping press safety circuits
- Material Handling: AGV charging station access control
Its SIL 3 certification ensures compliance in high-risk environments like foundries, pharmaceutical plants, and chemical processing facilities where redundant safety is critical.
4. Functional Advantages
- Space Efficiency: 22.5mm width saves panel space versus conventional relays
- Diagnostic Intelligence:
- Green LED: Normal operation
- Yellow LED: Device ready (post-reset)
- Red LED: Fault condition
- Safety Assurance:
- Force-guided contacts (EN 50205 certified)
- Cross-monitoring detects contact welding
- Configuration Flexibility:
- Manual/auto reset selection via jumper
- Startup test function validates contacts
- Durability:
- Stainless steel housing resists corrosion
100,000 mechanical operations
- Installation Simplicity:
- Spring-cage terminals (0.25–2.5mm²)
- Plug-and-play replacement
- Compliance Ready:
- Pre-certified to EN 60947-5-1
- SILCL 3 per IEC 61508
5. Safety Operation & Diagnostics
Dual-Channel Safety Logic:
- Input Monitoring:
- Continuous comparison of S11/S12 signals
- Detects discrepancies >5ms (e.g., contact welding)
- Startup Test:
- Validates contact separation upon power-up
- Prevents restart with undetected faults
- Output Control:
- Safety relays (13-14/23-24) close only when inputs are valid
- Auxiliary contact (31-32) signals reset status
- Reset Logic:
- Manual reset via external button (prevents automatic restart)
- Auto-reset option for non-critical applications
- Fault Management:
- Forces outputs open during input mismatches
- Stores last fault code in non-volatile memory
Critical Safety Timings:
- Fault detection → Output deactivation: ≤80ms
- Contact separation: Guaranteed ≥0.5mm
- Undervoltage lockout: Activates below 19V DC
| Parameter | Specification/Value |
|---|---|
| Product Type | Emergency Stop Pushbutton (Twist Release) |
| Series | SRB-E Standard Series |
| Actuator Diameter | Ø 40 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) | IP65 (Front), IP54 (Housing) |
| Rated Operating Voltage (Ue) | 24–240V AC/DC |
| Rated Current (Ie) | 10 A (AC-15), 6 A (DC-13) |
| Electrical Life | 100,000 cycles (at rated load) |
| Mechanical Life | ≥ 1,000,000 cycles |
| Actuation Force | ≥ 80 N (Complies with ISO 13850) |
| Release Mechanism | Key-operated Twist Release |
| Housing Material | Thermoplastic (PA 6.6) |
| Actuator Material | Thermoplastic (PA) with UV resistance |
| Contact Material | Silver Alloy (AgNi) |
| Operating Temperature | -25°C to +70°C |
| Connection Type | Screw Clamp Terminals (Max. 2.5 mm²) |
| Terminal Labeling | Internally laser-marked (13-14/21-22/31-32) |
| Mounting Style | Panel Mount (Ø 22.5 mm Cutout) |
| Shock Resistance | 30 g (EN 60068-2-27) |
| Vibration Resistance | 10–55 Hz (EN 60068-2-6) |
| Approvals/Certifications | CE, UL 508, CSA, TÜV, CCC, KC |
| Safety Standards | EN/IEC 60947-5-1, EN ISO 13850 |
| Contact Principle | Positive Opening (Forced break NC contacts) |
| Contact Security | Mechanically linked NC contacts |
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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