2 units sold
Leuze MSI‑SR4B‑02
Condition: New
Warranty: 1 Year
+10 Available
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sales@ddpartssolution.com
📞 +1 (689) 275-3558
Leuze MSI‑SR4B‑02 | Safety Relay | Emergency Stop & Safety Monitoring | Part No. 547951
Overview
The Leuze MSI‑SR4B‑02 (part no. 547951) is a compact safety relay designed to monitor emergency stop functions, safety sensors, and contactor feedback circuits. With 3 redundant NO relay outputs and configurable restart logic, this relay meets stringent safety standards including SIL 3 and PL e, making it suitable for high-risk industrial applications.
Key Features
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Safety Level: SIL 3 (IEC 61508), PL e (ISO 13849‑1), Cat. 4
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Relay Outputs: 3 normally open (NO), redundant
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Restart Modes: Manual and automatic selectable
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Terminals: Spring-cage connection, 16-pin
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Supply Voltage: 24 V DC/AC ±20%
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LED Indicators: Supply, K1, K2, Reset
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Mounting: DIN rail, compact 22.5 mm housing
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Cross-circuit and contactor monitoring included
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 547951 |
| Voltage Range | 24 V DC/AC ±20% |
| Current Consumption | Max 100 mA |
| Safety Outputs | 3 NO relay outputs, 3 A (each) |
| Max Thermal Current | 6 A |
| Restart Delay | Manual: ~30 ms / Auto: ~300 ms |
| Response Time | Typical 10 ms |
| Terminal Type | Spring-cage, 0.2–1.5 mm² (AWG 24–16) |
| Dimensions | 22.5 × 111 × 114 mm |
| Weight | Approx. 170 g |
| Protection Rating | IP20 (terminals) / IP40 (housing) |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | –25 °C to +70 °C |
| Mounting Type | DIN rail (EN 60715) |
| Standards | IEC 61508, ISO 13849‑1, IEC/EN 62061 |
Applications
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Emergency stop circuits on industrial machines
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Safety light curtains and position sensors
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Transponder-based safety devices
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Contactor and feedback circuit monitoring
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SIL 3 / PL e compliant safety architectures
Why Choose MSI‑SR4B‑02
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Meets the highest international safety classifications
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Flexible restart configurations for custom safety logic
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Compact footprint ideal for control panel integration
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Tool-free spring terminals for fast, secure wiring
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Diagnostic LEDs aid real-time troubleshooting
Order Now
The Leuze MSI‑SR4B‑02 safety relay (part no. 547951) is available and ships worldwide for fast integration into your safety systems.
Warranty Policy
Our warranty policy is designed to provide peace of mind and confidence in your purchases.
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New
1-year
This warranty covers manufacturing defects and performance issues, ensuring that you can enjoy your product worry-free.
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Our priority is to ensure your satisfaction and the quality of our products and services. If you have any questions about our warranty policy, please do not hesitate to contact our customer service team.
sales@ddpartssolution.com
📞 +1 (689) 275-3558
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Original Manufacturer Packaging
These products are industrial surplus items preserved in the original manufacturer box. Learn More
DDPARTSSOLUTION Packaging
These products are industrial surplus items shipped in secure DDPARTSSOLUTION protective packaging. Learn More
Refurbished
These products have been previously installed or may show cosmetic signs of prior handling. Learn More
