The Pilz SET4.2: PIT ES3.1 / BOX / 2 N/C 1 N/O (Part No. 400521) is a rugged and reliable control and signal device designed for use as an emergency stop (E-Stop) solution in demanding industrial environments. As part of the trusted Pilz PIT series, it combines robust mechanical design, high-quality contact technology, and compliance with international standards to ensure maximum operator safety and machine protection.

At the core of its design, the device complies with EN 60947-5-1, the international standard governing E-Stop switches. This certification guarantees that the unit meets stringent safety and reliability requirements, providing operators with the assurance that hazardous machine functions can be safely and immediately stopped in an emergency.

The switch features 2 normally closed (N/C) contacts and 1 normally open (N/O) contact, offering flexible integration into safety circuits and control systems. The dual N/C configuration ensures redundancy, which is a critical aspect of safety system design, while the N/O contact provides additional functionality for signalling or monitoring purposes. Together, they support a broad range of applications and system architectures.

To ensure consistent performance, the device uses AgNi (silver-nickel) contact material. This choice of material provides excellent electrical conductivity, resistance to oxidation, and durability against mechanical wear. As a result, the switch delivers reliable switching performance over many operating cycles, reducing downtime and minimising maintenance costs.

One of the standout features of this model is its wide operating temperature range, from -30 °C to +70 °C. This resilience makes it suitable for environments with extreme temperature fluctuations, such as outdoor installations, cold storage facilities, and high-temperature production areas. Additionally, the device meets pollution degree 3 clearance and creepage requirements, ensuring reliable operation even in environments where dust, humidity, or contaminants are present.

The minimum contact current rating of 1 mA ensures that the switch is suitable for use in modern control systems, including low-level electronic circuits. This makes it adaptable to both traditional electromechanical systems and advanced automation platforms that require precise and reliable switching at low current levels.

Engineered for industrial-grade durability, the SET4.2: PIT ES3.1 / BOX is designed to withstand tough conditions while maintaining reliable performance. Its robust construction ensures long service life, making it a cost-effective solution for machine builders and plant operators who prioritise both safety and efficiency.

Applications for this E-Stop device include manufacturing, packaging, robotics, material handling, and process automation, where it provides operators with a safe and reliable means of shutting down equipment in emergency situations.

In summary, the Pilz SET4.2: PIT ES3.1 / BOX / 2 N/C 1 N/O (400521) delivers standards-compliant safety, robust AgNi contact performance, a wide environmental tolerance, and flexible contact configurations. It is a dependable emergency stop solution that enhances machine safety, operator protection, and compliance across diverse industrial sectors.