DIGITAL PANEL METER – LUMEL N30O

The LUMEL N30O is a state-of-the-art, multifunctional digital panel meter from LUMEL’s prestigious N series, engineered to meet the demanding requirements of modern marine automation and industrial process control. Unlike standard meters, the N30O specializes in time-based and counting measurements, offering unparalleled flexibility for applications such as engine RPM monitoring, flow totalization, and encoder positioning .

Advanced Measurement Capabilities
This instrument is designed to measure a wide array of parameters with high precision:

• Frequency and Rotational Speed (RPM): Ideal for monitoring pumps, generators, and shaft speeds.

• Pulse Counting & Encoder Positioning: Features two counter inputs to co-operate with incremental encoders, counting both actual and total values .

• Period and Work Time Counter: Perfect for cycle timing and equipment run-time logging.

• Real-Time Clock: An integrated clock with supply backup in case of power failure .

Innovative Tri-Color Display for At-a-Glance Status
The N30O stands out with its 3-color LED display (red, green, orange), which is fully programmable. You can configure the display to change color based on the measured value (e.g., green for normal operation, orange for warning, red for critical alarm). This feature, combined with a highlighted measuring unit, allows operators to instantly assess system status from a distance, enhancing situational awareness in engine rooms.

Comprehensive Output and Communication Options
This model is highly adaptable, offering a full suite of I/O options:

• Four Alarm Outputs: Equipped with 2 NOC relay alarms and 2 switched relay alarms (changeover contact), all operating in 6 different modes (e.g., on, off, hysteresis) with front-panel LED signaling .

• Programmable Analog Output: The measured value can be converted into a standard industrial signal, selectable as 0/4…20 mA or 0…10 V, for transmission to PLCs or remote displays .

• Digital Communication: Features a galvanically isolated RS-485 interface with MODBUS RTU protocol, allowing for seamless integration into ship automation systems, SCADA, or building management systems for remote monitoring and control.

• 24V DC Transducer Supply: An integrated output provides power to external sensors (encoders, proximity switches), simplifying installation .

Flexible Programming and Signal Conditioning
The N30O offers powerful signal processing capabilities. It includes mathematical functions (square root, inversion) and a 21-point individual characteristic for linearizing non-linear sensor signals . Programming is simple via the front-panel keyboard or remotely via the RS-485 interface using LUMEL’s free eCon software . Additional features include min/max value memory, programmable averaging time (up to 1 hour), and password protection for configuration lock.

Rugged Construction for Harsh Environments
Built to withstand the rigors of marine and industrial environments, the N30O features a robust plastic casing with an IP65 protection rating from the front, making it dust-tight and protected against water jets . It fits a standard 96×48 mm DIN cut-out and offers flexible mounting options for panels or DIN rails (with optional adapter).