Leuze MSI-SR4B-01 | Safety Relay | 4 Safety Outputs | 24V DC | DIN Rail Mount | PL e / SIL 3 Overview The Leuze MSI-SR4B-01 is a modular safety relay designed for monitoring safety sensors such as light curtains, emergency stops, and safety switches. With 4 safety outputs, a 24V DC supply, and compliance with Performance Level e (PL e) and SIL 3, this relay module ensures high-level protection in industrial environments. Its DIN rail-mountable design allows for easy integration into control cabinets, offering a reliable solution for safety-related control functions. Key Features Type: Modular safety relay Supply Voltage: 24V DC Outputs: 4 safety outputs (relay) Status Indicators: LED diagnostics for input/output and errors Mounting: DIN rail Wiring Type: Screw terminal connections Response Time: Typically < 20 ms Housing Width: 22.5 mm (slim design) Technical Specifications Model Number: MSI-SR4B-01 Functional Safety:– Performance Level: PL e (EN ISO 13849-1)– SIL Rating: SIL 3 (IEC 61508 / IEC 62061) Input Type: Monitored inputs for safety devices (e.g. E-stop, light curtain) Operating Temperature: -10°C to +55°C Enclosure Rating: IP20 (for panel installation) Approvals: CE, cULus, TÜV Applications Emergency stop circuit monitoring Safety light curtain integration Two-hand control monitoring Machine guard door monitoring General industrial machinery requiring SIL 3/PL e compliance Why Choose the MSI-SR4B-01 Flexible Integration: Compatible with various safety devices High Safety Level: Meets SIL 3 and PL e requirements Compact Design: Slim 22.5 mm housing saves panel space Reliable Performance: Fast and fail-safe switching Trusted Brand: Part of Leuze’s industrial safety product line Order Now The Leuze MSI-SR4B-01 safety relay is in stock and ships worldwide.
