The Pilz PNOZ X3 42VAC 24VDC 3N/O 1N/C 1SO, part number 774311, is a multifunctional safety relay designed to monitor critical safety functions and provide reliable shutdown of hazardous energy sources. As part of the proven PNOZ X series, it combines versatile outputs, robust switching performance, and international compliance to ensure safe operation across a wide range of industrial environments.

This relay is particularly distinguished by its comprehensive output configuration. It features 3 normally open (N/O) safety contacts for direct control of safety circuits, ensuring hazardous movements or energy sources are disconnected immediately when required. An additional normally closed (N/C) auxiliary contact allows for system monitoring and feedback, providing operators and controllers with real-time relay status information. To complement these mechanical outputs, the device also includes 1 semiconductor signalling output (SO), offering reliable diagnostics and seamless integration with higher-level control or monitoring systems.

The relay is engineered to work with a 42 V AC supply input and 24 V DC auxiliary voltage, making it a versatile solution for installations that require both low-voltage control and auxiliary DC operation. This dual compatibility ensures broad application potential, simplifying integration into diverse industrial architectures. Additionally, the relay offers a tolerance of –20% / +20% on external DC voltage, guaranteeing stable operation even under fluctuating supply conditions—a critical advantage in harsh industrial settings.

Performance is underpinned by strong compliance with international standards. The PNOZ X3 is rated to EN 60947-1 (utilisation category DC-12) and EN 60947-4-1 (utilisation category AC/DC-1). These classifications ensure that the device performs reliably under both AC and DC switching conditions, supporting safety integrity and regulatory compliance in machine safety applications. The safety contacts are rated for 240 V AC, providing robust switching capability suitable for a broad range of machinery and protective devices.

Typical applications for the PNOZ X3 include monitoring emergency stop circuits, guard door switches, two-hand controls, and safety light curtains. Its combination of mechanical and semiconductor outputs makes it suitable for systems where both immediate shutdown and continuous diagnostics are required. In the event of a fault or hazard, the relay ensures fast and complete disconnection of hazardous energy, preventing accidents and safeguarding operators.

The relay’s robust electromechanical construction ensures durability and a long service life, even in continuous operation. Its compact design and straightforward wiring further simplify installation, reducing commissioning time and minimising errors during setup.

In summary, the Pilz PNOZ X3 42VAC 24VDC 3N/O 1N/C 1SO (774311) is a flexible and reliable safety relay built to deliver comprehensive safety control and monitoring. With its three safety contacts, auxiliary contact, semiconductor output, wide voltage compatibility, and adherence to EN standards, it provides an efficient and dependable solution for protecting both operators and machinery in diverse industrial applications.