The Pilz S1EN 50KOHM 24-240VAC/DC (part no. 884100) is a precision monitoring relay developed to supervise resistance-based circuits and ensure reliable fault detection in industrial safety and automation systems. As part of Pilz’s extensive range of monitoring devices, this unit plays a critical role in protecting both personnel and machinery by ensuring that monitored parameters remain within safe operating ranges.

One of its most notable features is its broad supply voltage compatibility. The relay supports a wide range of input voltages from 42 to 240 V AC/DC, making it highly versatile for global industrial applications where different supply standards are used. In addition, it includes a dedicated 24 V supply input (U2), ensuring straightforward integration into low-voltage control circuits and enhancing system design flexibility. This dual-voltage support reduces the need for multiple device variants, simplifying logistics and spare-part management.

The S1EN 50KOHM is designed to monitor circuits with a 50 kΩ resistance threshold. This capability allows it to detect abnormalities such as insulation degradation, ground faults, or wiring issues, which could compromise system integrity or operator safety. By providing early detection of such faults, the relay enables timely intervention, preventing accidents, equipment damage, and costly downtime.

Energy efficiency is another important strength of the device. With a power consumption of just 5 VA in AC mode and 1 W in DC mode, the S1EN contributes to lower operating costs while also reducing thermal load within control cabinets. This not only extends the lifespan of the relay itself but also supports overall system reliability by minimising heat accumulation in densely packed installations.

Constructed to Pilz’s renowned standards of durability and reliability, the relay is suitable for long-term operation in demanding industrial conditions. Its robust housing and high-quality internal components ensure dependable performance even in applications subject to vibration, fluctuating environmental conditions, or continuous duty cycles.

The S1EN is straightforward to install and integrate, thanks to its compact design and standardised terminal connections. This reduces commissioning time and minimises the potential for wiring errors. Once integrated, it provides consistent and accurate monitoring, forming a dependable part of a larger safety or control system.

Typical applications for this monitoring relay include machine safety systems, process automation, and electrical protection circuits. It can be deployed wherever resistance monitoring is required to maintain compliance with safety regulations or to enhance the reliability of critical systems.

In summary, the Pilz S1EN 50KOHM 24-240VAC/DC offers a robust, versatile, and energy-efficient solution for resistance monitoring in industrial environments. With its wide voltage compatibility, low power consumption, and specialised fault detection capabilities, it helps ensure that industrial processes remain safe, reliable, and standards-compliant.