Leuze - MSI-TRMB-01 - Safety Relay, 2 NO + 3 PNP Outputs, 24 V DC, PL e, SIL 3

The Leuze MSI-TRMB-01 (Part No. 547931) is a safety relay designed for monitoring and controlling type 4 optoelectronic protective devices, such as single-beam safety sensors, in accordance with IEC/EN 61496. It features two safety-related relay outputs (NO) and three PNP transistor outputs, providing reliable performance in safety-critical applications. 

Key Features:

• Model: MSI-TRMB-01

• Part Number: 547931

• Brand: Leuze

• Function: Safety relay for type 4 protective devices

• Supply Voltage: 24 V DC (±20%)

• Safety Outputs: 2 Normally Open (NO) relay contacts

• Digital Outputs: 3 PNP transistor outputs (including error signal)

• Safety Inputs: 2 channels for safety-related switching

• Digital Inputs: 2 channels for start/restart interlock (RES)

• Response Time: 130 ms

• Restart Modes: Selectable automatic or manual restart

• Safety Ratings:

  • Performance Level: PL e (EN ISO 13849-1)

  • Safety Integrity Level: SIL 3 (IEC 61508)

  • Category: 4 (EN ISO 13849-1)

  • SILCL: 3 (IEC/EN 62061)

  • MTTFd: 100 years

  • PFHD: 2.15 × 10⁻⁹ per hour

• Mounting: DIN rail (snap-on)

• Housing Width: 22.5 mm

• Protection Rating: IP20 (housing and terminals)

• Operating Temperature Range: -25°C to +55°C

• Certifications: c UL us

• Applications: Ideal for integrating type 4 safety sensors into control systems, ensuring compliance with high safety standards in industrial automation environments.