The Pilz PNOZ X4 24VAC 3N/O 1N/C (Part Number: 774731) is a compact and robust safety relay engineered to provide dependable monitoring of safety functions and controlled shutdown of hazardous machine operations. As part of the Pilz PNOZ X range, renowned worldwide for reliability and compliance, this unit combines simplicity, durability, and versatility, making it suitable for a wide array of industrial applications.

Operating on a 24 V AC supply, the PNOZ X4 is particularly well-suited to environments that utilise low-voltage AC for safety control circuits. With a modest power consumption of 5 VA, it delivers energy-efficient performance while maintaining the high reliability required in safety-critical systems.

The relay features a contact configuration of 3 normally open (N/O) and 1 normally closed (N/C) contact. The N/O contacts provide the primary safety switching function, ensuring hazardous machine elements such as motors, actuators, or drives are disconnected when an unsafe condition occurs. The additional N/C contact is typically used for diagnostic purposes, feedback to control systems, or signalling alarms, adding visibility and flexibility to system design.

To enhance safety integrity, the PNOZ X4 includes 2 input channels, allowing it to monitor devices redundantly. This dual-channel approach provides fault detection and ensures that failures in one channel do not compromise operator safety. It is compatible with a wide range of protective devices such as emergency stop pushbuttons, safety gates, light curtains, or two-hand control systems, making it versatile and adaptable to different safety architectures.

Built in compliance with EN 60947-4-1 (utilisation category AC/DC-1), the PNOZ X4 guarantees consistent performance when switching resistive and standard industrial loads. This ensures its suitability for global applications, giving machine builders and operators confidence that their safety systems meet regulatory and operational requirements.

The industrial-grade construction of the relay ensures reliable operation in demanding environments where vibration, electrical noise, or continuous use are expected. Compact and easy to install, it integrates seamlessly into control cabinets, providing cost-effective safety functionality without requiring complex programming or configuration.

Typical applications of the PNOZ X4 24VAC include packaging machines, material handling systems, presses, robotics, and general machinery where operator safety and system reliability are critical. Its ability to safely shut down multiple hazardous functions while providing auxiliary monitoring makes it a valuable component in both standalone systems and larger safety architectures.

In summary, the Pilz PNOZ X4 24VAC 3N/O 1N/C (774731) is a reliable and efficient safety relay designed for low-voltage AC applications. With its versatile contact arrangement, dual-channel monitoring, compliance with international standards, and robust industrial design, it offers a dependable and cost-effective solution for safeguarding personnel and machinery across a wide range of industries.