ABB Liquid Level Relay, DIN Rail, 240V AC/DC, 2 SPDT Output, CM-ENS Series 1SVR740850R0300 CM-ENS.31P

ABB's 1SVR740850R0300 CM-ENS.31P Liquid Level Relay is engineered for precise monitoring and control of conductive liquid levels in demanding industrial and automation environments. Featuring a robust DIN Rail mount design, this relay offers fast installation into control panels, designed for applications such as pump protection, overflow prevention, and liquid leak detection.

This relay operates on a wide input supply range of 240V AC or DC, providing flexible integration to various control architectures. With two SPDT relay output contacts, it can manage both fill and drain functions efficiently, and supports front panel adjustments for ON/OFF delay and response sensitivity, enabling tailored performance for each application scenario.

The CM-ENS series features a space-saving compact enclosure just 22.5 mm in width, constructed from fire-protected, environmentally responsible materials. Secure screw terminal connections ensure reliable and easy wiring, compatible with industrial installation norms. Visual LED indicators on the front panel provide clear operational status for immediate troubleshooting and system checks.

This relay is suitable for a range of level management tasks, such as protecting pumps against dry running, controlling mixing ratios, detecting leaks, and maintaining optimal liquid levels in process tanks. It is designed for safe, straightforward installation and is cascaded for advanced level control requirements. The enclosure is IP20/IP50 rated for protection against dust and ingress, supporting dependable operation in harsh industrial conditions.

With sensitivity configurable up to 1000 kΩ, the relay is capable of detecting a variety of liquid types. It operates reliably in ambient temperatures from -25°C to 60°C, and the compact design allows high-density mounting without compromising safety or accessibility. ABB's CM-ENS.31P fulfills international standards including IEC/EN 61000-6-2, CE, UL, and EAC, ensuring compliance with critical automation and control requirements.

Typical use cases include pump stations, wastewater treatment, chemical processing, and commercial building management systems, where reliable liquid level sensing and automated control are essential for operational safety and efficiency.

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