DDSU228-L 2P single-phase rail type electric energy watch strap pull and close switch （4G）

Overview

The DDS type DIN rail mounted energy meter (hereinafter referred to as the "instrument") is an energy meter used to measure single-phase active energy with a reference frequency of 50Hz. This instrument is a high-tech product manufactured using internationally advanced ultra-low power large-scale integrated circuit technology and SMT process. It has significant advantages such as high measurement accuracy, good stability, high reliability, intuitive display, and strong overload capacity. The key components are selected from internationally renowned brands of long-life devices, which improves the reliability and service life of the product. The data display adopts LCD, which is intuitive and has infrared communication, making it convenient for users to manage energy data. This instrument complies with GB/T 17215.321-2008 and DL/T 645-1997/2007 standards. This instrument is equipped with a 7-digit LCD display that shows functional power levels. It has the characteristics of good reliability, small size, light weight, beautiful appearance, and easy installation. Widely applicable and convenient to set up

working principle

As shown in the figure below, the main working principle of this instrument is that the electricity consumed by the user is sampled through current and voltage; After A/D conversion, it is sent to the multiplier for multiplication, and the multiplied signal is then converted by the D/F converter. The pulse output by the frequency division circuit is sent to the microcontroller CPU for data processing and measurement. The microcontroller CPU displays the electrical energy data through LCD and reads the electrical energy data through 485 and infrared interfaces.

Technical parameters and specifications

1. Model and specifications

2. Appearance and installation dimensions

3. Install the wiring diagram

3.4 Display Instructions

• Positive active energy/kWh:

  When Ct=0001, the display format is 000000.0, and the displayed amount is exactly what it is.

  When Ct is not equal to 0001, the electrical energy is composed of H000000 and L00000.0. For example, when H000142 and L85463.2, it indicates that the actual positive electrical energy is 14285463.2 degrees.

  
  

• Reverse active energy/kWh:

  When Ct=0001, the display format is -00000.0, and the amount displayed is exactly what it is.

  When Ct is not equal to 0001, the electrical energy is composed of - H00000 and - L0000.0. For example, when H000142 and L85463.2, it indicates that the actual positive electrical energy is 14285463.2 degrees.

  
  

• Table internal parameter display code description:

  Active constant of the electricity meter: C=XXXX, the current active pulse constant of the electricity meter

  
  

• postal address:

  Modbus protocol address: Adr 001

  
  

• 645 protocol address: High 6-digit HFFFFF, Low 6-digit LFFFFFF

  
  

• Communication parameters: 9600 E: The current communication rate is 9600, and the current validation is even parity.

  
  

  
  

Installation and Usage

• The electric meter has been inspected and certified as qualified before leaving the factory. Before installation and use, the appearance should be checked for integrity. If the appearance is intact, it can be installed and used.

• The electric energy meter should be installed indoors in a dry and ventilated place, avoiding direct exposure of strong light to the meter window. The bottom plate of the electric energy meter should be placed on an insulated object that is not easily affected by moisture, and it is recommended to install it at a height of 1.8 meters or more.

• The electric energy meter should be wired according to the shell wiring diagram, and attention should be paid to the current size and the matching of the wires. The joint terminals should be suspended tightly to avoid damage to the instrument when the current is too high.

• The voltage connected to the energy meter should comply with the reference specified value of the energy meter, and the current passing through should not exceed the maximum current limit shown on the energy meter. Exceeding this range will result in inaccurate measurement, and in severe cases, it may cause instrument damage and safety accidents.

Transportation and Storage

• The transportation of electric energy meters should not be subjected to severe impacts. Measures for transporting precision instruments should be taken, and transportation and storage should be carried out in accordance with the provisions of GB/T15464-1995 "General Technical Conditions for Packaging of Instruments and Meters".

• The electric energy meter should be stored in its original packaging box, in a clean location with an ambient temperature of -25 ℃ to+70 ℃, a relative humidity not exceeding 85%, and the air should not contain harmful substances that can cause corrosion.

• This product is a precision electronic instrument. If there are obvious signs of damage to the outer shell due to severe impact or falling from a high altitude during product handling, use, or installation, please do not power on the electric meter and contact our company as soon as possible for handling.

• If the electric energy meter is not installed or used for a long time, it should be packaged properly and stored in its original box for no more than three years.