The Pilz S1UM 42-48VAC UM 0.1-500VAC/DC UP is a versatile monitoring relay designed for dependable voltage supervision in industrial applications. As part of the renowned Pilz safety and monitoring portfolio, this device combines broad functionality with energy efficiency, ensuring critical system voltages remain within safe operational limits.

A defining feature of this unit is its exceptionally wide measurement range, spanning from 0.1 VAC/DC to 500 VAC/DC. This capability allows a single device to be deployed across various systems and voltage classes, reducing the need for multiple monitoring relays and simplifying stock management. Whether used in AC or DC circuits, the S1UM ensures precise and consistent monitoring, making it suitable for industries ranging from manufacturing to utilities and infrastructure.

The device operates from a 42–48 V AC supply voltage, offering an advantage in systems where only lower-voltage auxiliary power is available. This makes it especially useful in specialised installations or safety-critical environments where reduced supply voltages are a design requirement. Despite this low supply voltage, the relay delivers high accuracy and reliable performance across its full monitoring range.

Energy efficiency is another important consideration in modern facilities, and the S1UM addresses this with a low power consumption of just 2 VA. This efficiency not only reduces energy costs but also supports broader sustainability goals by lowering the overall energy footprint of monitoring systems.

Built to meet the requirements of EN 60947-4-1, the S1UM aligns with international standards for utilisation categories AC/DC1, guaranteeing compliance and safety in operation. Its design ensures stable performance even under demanding industrial conditions, providing operators and system designers with peace of mind.

In practical use, the S1UM is employed to supervise voltage levels in control panels, distribution systems, motor drives, and safety circuits. It ensures that undervoltage, overvoltage, or loss of supply conditions are quickly detected, preventing equipment damage and maintaining operator safety. This makes it indispensable in critical applications where system downtime or equipment failure can result in significant productivity losses or hazards.

In conclusion, the Pilz S1UM 42-48VAC UM 0.1-500VAC/DC UP delivers a robust solution for voltage monitoring needs, combining wide measurement capability, low-voltage supply operation, energy efficiency, and compliance with international safety standards. It is an ideal choice for engineers and system integrators seeking a reliable monitoring relay for both new projects and retrofits.