Integrated DC Energy Meter

DC meters designed for application scenarios such as DC power panels, EV charging piles, and telecom base stations.

Product Description

Utilizing microelectronics technology to measure DC energy, featuring multi-protocol support, ultra-low power consumption, and matching use with EV charging piles, it is equipped with functions such as LCD display, energy metering, clock, RS485 communication, electrical and second pulse output, and instantaneous data measurement and monitoring, suitable for DC energy metering.
The technical indicators comply with the requirements of the GB/T 33708-2017 standard, “Static Meters for Direct Current Energy,” equipped with 2x independent RS485 interfaces that support the DL/T 645-2007 protocol as well as Modbus-RTU, a widely used industrial protocol, for easy and rapid integration.

Product Advantages

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Energy Metering

Forward/reverse energy metering function; supports four tariffs (sharp-peak, peak, shoulder/flat, and valley), with two sets of tariff TOU tables that can be switched at a designated time.

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Communication Functions

2x RS485 ports, supporting DL/T 645-2007 and Modbus-RTU protocols.

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Data Storage

Stores the last 100 charging information records; stores unidirectional or bidirectional total and per-tariff energy data for the past 12 settlement days; in the event of a meter power failure, settlement data shall be retained for at least 10 years, and other data for at least 3 years.

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Data Freeze

Supports functions including scheduled freeze, instantaneous freeze, daily freeze, designated freeze, and hourly freeze.

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Clock, TOU, and Tariff Functions

Built-in hardware clock circuit with automatic calendar, timing, and leap year switching; the clock accuracy is \(\le \) \(\pm 1\) s/d at room temperature, and \(\le \) \(\pm 1\) s/d within the temperature range of -25°C to +60°C.

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Output Functions

Energy pulse output and second signal output.

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Event Logging

Total number of clock calibrations, as well as the timestamps and operator codes of the last 10 clock calibrations; total number of programmings, the last 10 programming records, along with the programming timestamps, operator codes, and programmed items; total number of cover openings, the occurrence and end timestamps of the last 10 cover openings, as well as the energy data at the time of each cover opening occurrence.

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Parameter Measurement and Display

Measures and displays parameters and information of the current DC energy meter, including voltage, current, power, time, and energy data.