Leuze MSI-SR4B-01

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.

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