NORIS RG51 Limit-Value Switch A59751 Rev F

NORIS RG51 Limit-Value Switch for Frequency | A59751 Revision F

The NORIS RG51 Limit-Value Switch (A59751, Revision F) is a high-precision frequency monitoring module engineered for the rigorous demands of marine and industrial automation. As part of the established Series 5 signal processing line, this instrument monitors electrically measured variables and activates an integrated relay once a predefined frequency threshold is reached. Whether monitoring engine speeds on commercial vessels or managing motion control in factory settings, the RG51 provides a highly reliable solution. Its compact, flame-retardant enclosure and galvanic isolation ensure stable performance even in environments subject to high vibration or electromagnetic interference.

A critical component in safety and control architectures, the NORIS RG51 converts frequency input signals—typically from speed sensors—into switching commands. The “Revision F” updates ensure full software compatibility with modern PLCs and automation controllers. It features an intuitive drum scale for adjusting limit values, protected by an anti-tamper seal to prevent unauthorized field modifications.

Key Features

• Adjustable Threshold: Features a tamper-proof drum scale for setting precise limit values across the entire input range.
• Galvanic Isolation: Complete separation of input, output, and supply voltages ensures signal integrity and equipment protection.
• Marine-Grade Durability: Housed in a flame-inhibiting, self-extinguishing enclosure built to withstand harsh maritime conditions.
• Visual Diagnostics: Integrated LED indicators provide real-time status updates for power and relay switching states.

Technical Specifications