Bernstein Werkzeugfabrik Safety Relay SCR 4-W22-3.5-D, 24 V AC/DC, 2 NO + 1 NC, Screw Terminal, DIN Rail

The Bernstein Werkzeugfabrik Safety Relay SCR 4-W22-3.5-D is a high-performance safety relay designed for demanding industrial applications. It ensures reliable monitoring and control of safety circuits, meeting the highest safety standards.

Advantages

This safety relay offers a compact 22.5 mm housing for space-saving DIN rail mounting, manual or monitored start reset function, and supports 1- or 2-channel input wiring. It is certified for Safety Category 4 / PL e and SIL 3, providing maximum safety for personnel and machinery.

Suitable for

• Safety circuits in industrial automation
• Machine safety systems
• Emergency stop and guard monitoring
• Applications requiring high safety integrity levels

Key specifications

• Supply voltage: 24 V AC/DC
• Safety outputs: 2 NO (Normally Open)
• Auxiliary outputs: 1 NC (Normally Closed)
• Rated output current: 6 A
• Rated output voltage: 250 V AC
• Terminal type: Screw terminals
• Mounting: DIN rail (35 mm)
• Housing width: 22.5 mm
• Response time: max. 20 ms
• Operating temperature: -25 °C to +55 °C
• Protection class: IP40 (housing), IP20 (terminals)

Recommendations

For optimal performance, use with appropriate safety-rated controllers and ensure proper wiring according to the manual. Regularly test the safety function to maintain compliance with standards.