The Pilz PZA 3/24VDC 1N/O 2N/C – 774041 is a robust and efficient safety relay designed to reliably monitor protective devices and ensure immediate machine shutdown when safety functions are triggered. Belonging to the trusted Pilz PZA series, this relay delivers a combination of energy efficiency, flexible contact configuration, and compliance with industrial standards, making it a reliable solution for machine safeguarding.

Operating on a 24 V DC supply, the PZA 3 integrates easily into modern control architectures, especially in automation environments that predominantly use low-voltage DC power. With a power consumption of just 3 W, it ensures energy-efficient operation, reducing long-term running costs and minimising heat build-up inside control cabinets.

The relay features a versatile contact arrangement consisting of 1 normally open (N/O) safety contact and 2 normally closed (N/C) safety contacts. This setup allows it to handle both actuation and feedback functions within a single device, providing flexibility for machine builders and system integrators. The N/O contact can directly control actuators, motors, or contactors, while the N/C contacts provide reliable monitoring, ensuring the safety circuit responds correctly to all conditions.

In addition, the unit includes 2 delayed auxiliary contacts, which provide valuable feedback for diagnostic and monitoring purposes. These auxiliary outputs can communicate system states to higher-level controllers or signal devices, enabling maintenance personnel to quickly identify faults or status changes. Such features improve system visibility, reduce downtime, and support predictive maintenance practices.

Compliance with EN 60947-4-1 utilisation categories (AC/DC1) ensures that the relay meets stringent safety and switching standards. This guarantees robust performance even in demanding industrial environments, where frequent switching and high reliability are essential.

The PZA 3/24VDC is designed for long service life and straightforward integration. With compact dimensions and clearly marked terminals, it simplifies installation in control cabinets, reducing wiring effort and setup time. Its durable construction ensures reliable operation under continuous duty, minimising maintenance requirements and supporting long-term productivity.

Common applications include monitoring emergency stop devices, protective doors, and safety light barriers. It is particularly valuable in industries such as packaging, manufacturing, material handling, robotics, and processing, where safeguarding operators and equipment is critical to maintaining both safety compliance and operational efficiency.

In summary, the Pilz PZA 3/24VDC 1N/O 2N/C – 774041 is a compact, energy-efficient, and standards-compliant safety relay. With its 24 V DC operation, flexible contact configuration, and auxiliary outputs for diagnostics, it provides a dependable solution for safeguarding industrial machinery while ensuring compliance with international safety standards.