Legrand 412051 EMDX3 Network Analyzer with RS485 Interface

The Legrand 412051 EMDX3 is a professional network analyzer engineered for the precise monitoring and measurement of electrical parameters within industrial and commercial electrical installations. This device provides comprehensive visibility into power consumption and network quality, facilitating efficient energy management. Equipped with an RS485 communication interface, it supports seamless integration into building management systems for remote data acquisition and analysis.

Advantages

This network analyzer offers high-precision measurement capabilities with a 0.5 accuracy class, ensuring reliable data for energy auditing and operational efficiency. The inclusion of an LCD display allows for immediate local monitoring of electrical values, while the support for harmonic analysis up to the 25th order helps in identifying power quality issues. Its modular design for DIN rail mounting simplifies installation in standard electrical cabinets, and the programmable alarm functionality provides proactive notification of threshold violations, enhancing system safety and maintenance planning.

Suitable for

• Industrial energy management systems
• Commercial building power monitoring
• Electrical distribution panel integration
• Energy consumption auditing and reporting
• Power quality analysis and harmonic monitoring

This device may not be suitable for residential applications where space is extremely limited or where advanced energy management software integration is not required. It is also not intended for direct high-voltage measurement without the use of appropriate current transformers.

Key specifications

• Mounting: TH35 DIN rail
• Width: 4 modules (78 mm)
• Display: Integrated LCD
• Accuracy class: 0.5
• Communication: RS485 and pulse output
• Measurement parameters: Current, voltage, frequency, active/reactive/apparent power, power factor, active/reactive energy
• Harmonic analysis: Up to 25th order (via Modbus)
• Metering: 4-tariff capability
• Alarm functions: Programmable for all measured values

How to use

The Legrand 412051 is designed for installation on a standard TH35 DIN rail within an electrical distribution board. Connection to the electrical network requires the use of external current transformers to measure current values safely and accurately. Once installed, the device can be configured via the front interface to set up specific measurement parameters and alarm thresholds. For remote data collection, the RS485 interface should be connected to a compatible energy management system using the Modbus protocol, allowing for continuous monitoring and logging of electrical data.

What to consider before purchase

• Ensure the electrical panel has 4 modules of available space on the DIN rail.
• Verify that compatible current transformers are available for your specific installation requirements.
• Confirm that your energy management system supports the Modbus communication protocol via RS485.
• Check if the 4-tariff metering feature aligns with your local utility billing structure.

Usage recommendations: Regularly verify the integrity of the RS485 communication wiring to ensure uninterrupted data transmission. It is recommended to perform periodic checks of the programmed alarm thresholds to ensure they remain relevant to the current operational requirements of the facility.