The Pilz S1UM 42-48VAC UM 0.1-500VAC/DC is a compact, reliable voltage monitoring relay that ensures operational safety by supervising critical AC and DC voltages in industrial environments. As part of the Pilz monitoring range, it combines flexibility, accuracy, and compliance, making it an indispensable tool for automation and electrical systems where voltage stability is essential.

At its core, the S1UM is designed to monitor an exceptionally wide voltage range from 0.1 to 500 VAC/DC, providing one device for multiple applications. This versatility reduces the need for different monitoring relays across installations, streamlining inventory management and simplifying integration into various systems. It reliably detects undervoltage, overvoltage, and loss of supply conditions, ensuring sensitive equipment is protected and personnel remain safe.

The relay is supplied with a 42–48 V AC operating voltage, making it particularly useful in control environments where auxiliary systems are powered by reduced voltages. This feature allows it to be deployed in specialised setups, such as those designed with extra safety considerations or installations where lower supply voltages are standard practice. Despite its low supply input, the S1UM delivers consistently high monitoring accuracy and dependable performance.

Energy efficiency is another highlight of this device. With a power consumption of only 2 VA, it adds minimal load to the system, contributing to reduced operational costs and supporting sustainability initiatives in modern facilities.

Designed in line with international standards, the S1UM aligns with EN 60947-4-1 (AC/DC1 utilisation category) and EN 60947-5-1 (AC15/DC13 utilisation category). This ensures that the device not only provides reliable monitoring but also meets safety and performance criteria required by global markets. Its robust design and compliance make it suitable for a broad spectrum of industries, from manufacturing and process automation to utilities and infrastructure.

In practice, the S1UM 42-48VAC UM is widely used in control panels, power distribution systems, motor protection circuits, and automation networks. By delivering accurate supervision of both AC and DC voltages, it prevents unexpected downtime, protects equipment from damage, and enhances the overall safety of installations.

In conclusion, the Pilz S1UM 42-48VAC UM 0.1-500VAC/DC offers a comprehensive solution for voltage monitoring, uniting broad measurement capability, low-voltage supply operation, energy-efficient design, and compliance with international standards. It is a trusted choice for engineers and integrators seeking dependable performance and adaptability in monitoring devices.