Single-phase IoT Smart Bluetooth Parent-child Electricity Meter (din rail) (Type

DDZY2397 single-phase IoT smart Bluetooth parent-child electric energy meter (din rail) consists of one parent meter and multiple child meters. It adopts digital signal processing chip, permanent storage of information, standard Bluetooth, LoRaWAN, NB-IoT, Cat.1 and WiFi communication interfaces, LCD and other technologies. The advanced SMT surface mounting process is adopted for the electric energy meter. The shell is made of high-strength, flame retardant and environment-friendly materials, which is novel, beautiful and applicable. It has high insulation strength and corrosion resistance. The meter integrates many functions, including electric energy metering, information storage and processing, information interaction, etc.

Product Selection Table

Product Features

The single-phase IoT smart Bluetooth parent-child electric energy meter (din rail) exchange data wirelessly via Bluetooth. The transmitted data contains relevant information for the corresponding receiving meters, which are processed after comparing the information. This solution is suitable for situations where energy meters are installed densely, eliminating the need for RS485 wiring and making the overall deployment more convenient and cost-effective.

Example: the platform issues instructions that are sent to the corresponding parent meter through the communication interface of LoRaWAN/NB-IoT/Cat.1/WiFi (optional). The parent meter then transmits the instructions to the child meters via Bluetooth. Upon receiving the data, the child meters within multiple ranges will perform corresponding operations based on the child meter information in the data. When the child meters upload data through Bluetooth, the data also contains the entered parent meter information, and the corresponding parent meter sends back the data to the platform after receiving it.

Product Functions

1.Electric energy metering: metering of positive and negative active electric energy. The electric energy shall be accumulated and stored separately for tip, peak, flat, valley and other periods and the total electric energy. It can store and display various electric quantities in the last 12 months.

2.Data display: it can measure, store and display the current voltage, current, power, power factor, frequency and other operating parameters and status of the electric energy meter. 

3.Time period rate: there are two sets of rates (tip, peak, flat and valley) and time periods that can be programmed at will, and another set of rates and time periods can be used at the set time point. At least 2 time zones can be set for each set of rate periods throughout the year. At least 14 time periods can be set within 24 hours; The minimum interval between periods is 15 minutes. The time period can be set across zero points.

4.Power freezing: it has such freezing functions as instantaneous freezing, regular freezing, daily freezing, agreed freezing, and hourly freezing.

5.Event recording: It has the functions of event recording such as zero clearing, programming, timing, power failure, switching on and switching off.

6.Remote on- off:  remote power off and transmission function, send power off command through Bluetooth /LoRaWAN/NB-IoT/Cat.1/WiFi communication interfaces to cut off the user's load circuit. Or send the power transmission command to connect the user load circuit. It has overload protection function.

7.Data communication: active upload/two-way transparent transmission function: actively transmit data to the corresponding platform through Bluetooth /LoRaWAN/NB-IoT/Cat.1/WiFi (optional) wireless network. The default interval is 4 hours (settable).

Technical Parameters

Display Description

After powering on, the LCD screen will fully display for 3 seconds. Then display the current active electrical energy and current active power alternately.

Status indicator lamp

The electricity meter uses a bright, long-life LED as a pulse indicator light.

It has active power pulse indicator light: red, usually go out, flashing when measuring active power.

LoRaWAN/Cat.1 Module status indicator: green. Always on indicates online, and flashing indicates going online.

Wiring Diagram

The main terminal wiring is as shown in the figure: [1] is Phase In. [2] [4] is Phase Out. [5] is Zero In / Zero Out. [6] [7] is metering pulse outputs. [8] and [9] are clocks.

Overall Dimension

L * W * H (unit: mm): 92×90×78