- [Energy Metering module]How is the im1253b electric energy metering module connected to the actual load? Does it matter if the fire zero line is connected reversely?2022.11月.24 10:26
- Users do not need to worry that the module will be burnt or not measured if the live line and zero line are connected reversely. The module has been processed by hardware design and program to ensure that the positive and negative connection will not affect the use of the module and that the electric energy and electric parameters will be measured correctly.
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- [Energy Metering module]Can im1253b electric energy metering module communicate with multiple modules through one serial port? If yes, what should I do?2022.11月.24 10:25
- Answer: the communication port of im1253b is UART port. This communication port belongs to one-to-one communication port and cannot realize 1-to-many communication. If it is really necessary, one serial port can communicate with multiple modules. It can be realized by adding CD4051 single ended 8-channel multi-channel switch chip between modules and serial ports.
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- [Energy Metering module]Can im1253b electric energy metering module be compatible with im1253?2022.11月.24 10:24
- A: im1253b is an upgraded version based on im1253 and according to customer requirements. It has a great improvement in function compared with im1253. Its pins have been redefined. Therefore, physically speaking, the two are incompatible. In addition, considering performance, supply and price, we recommend that you use the im1253b electric energy metering module.
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- [Energy Metering module]Can the im1253b electric energy metering module measure the battery?2022.11月.24 10:21
- Answer: im1253b can measure the voltage, current, power and electric energy generated on the charging or discharging line of the battery, but cannot measure the remaining capacity of the battery. If the residual capacity requirement is not accurate, it can be treated by estimation (i.e. known energy - consumed energy = residual energy).
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- [Energy Metering module]What is the current range of im1253b electric energy metering module? What if I want to measure a larger current?2022.11月.24 10:20
- Answer: the maximum measuring current of im1253b standard is 16A. If DC or AC current or power with larger current range is required, this module can be equipped with DC manganese copper (100A / 75mV, 200A / 75mV, 300A / 75mV) or AC open transformer (150A, 250A, 500A, etc.) with various ranges.
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- [Energy Metering module]Why does im1253b power metering module need two power supplies? Can you only use one circuit of power supply?2022.11月.24 10:18
- A: why do I need two routes? Because manganese copper sampling is adopted for this module, the ground of the whole module is on the live line (see the figure below), which has been isolated from the communication module of MCU. The power supply of the other module needs to be isolated from the external power supply, so as to prevent damage to the external equipment. It is not allowed to use only one circuit in parallel, otherwise the module or external equipment will be damaged. Therefore, two power sources must be used for power supply, and one of them must be isolated.
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- [Energy Metering module]When the im1253b module is actually measuring, why is the measured voltage and current multiplied by the power not equal?2022.11月.24 10:15
- Answer: the calculation formula of standard active power is: voltage x current x power factor (uxixcos Φ), Never lower the power factor. Our electric energy measurement mainly measures the active power, and the voltage x current is the apparent power.
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- [Energy Metering module]How to test the performance of im1253b electric energy metering module after receiving the goods?2022.11月.24 10:13
- A: the im1253b can realize AC and DC adaptive measurement, that is, the im1253b you purchased can measure both DC and AC parameters. You don't need to worry about how to distinguish between AC module and DC module.
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- [Energy Metering module]Can im1253b measure AC and DC? How can I distinguish these two modules.2022.11月.24 10:10
- A: the im1253b can realize AC and DC adaptive measurement, that is, the im1253b you purchased can measure both DC and AC parameters. You don't need to worry about how to distinguish between AC module and DC module.
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- [Energy Metering IC]Rn8209x (C \ D \ g) rn8208g rn8207c read operation, since there is no check byte in the frame format, how to ensure that the read data is the correct2022.11月.24 10:07
- Answer: the data read back from the SPI / UART port of the register address 44h rdata last time is used. After reading back a register data each time, the comparison of the values of the 44h rdata is read back. Only when the data is identical, can it be read effectively. If the data read back two times is different, the data read back is invalid and the register needs to be read again.
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- [Energy Metering IC]What is the correspondence between rn8209x (C \ D \ g) rn8208g rn8207c power register and voltage and current effective value register?2022.11月.24 10:06
- Answer: when power gain is 0 and power factor is 1, power register, voltage effective value register and current effective value register meet the following formula:Power register value / 2 ^ 31 = (voltage RMS register value / 2 ^ 23) x (current RMS register value / 2 ^ 23).
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- [Energy Metering IC]In the calibration applications such as rn8209x / rn8208g / rn8207c / rn8302b / rn821x / rn202x / rn7326, the normalized value is often mentioned. How2022.11月.24 10:01
- Answer: normalized value: the maximum value of the register is 1. The ratio between the actual register value and the maximum value of the register is the normalized value. This process is called normalization.
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- [Industry information]In the first quarter of 2022, the sales volume of new energy vehicles totaled 1.257 million, with a year-on-year increase of 138.6%2022.11月.23 16:54
- On April 11, the latest data released by China Automobile Industry Association showed that in March, the sales volume of new energy vehicles was 484000, with a year-on-year increase of 114.1%, continuing to maintain a rapid development momentum.
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- [Industry information]Making charging more convenient than refueling, Guangzhou will build the world's first "super charging city"2022.11月.23 16:41
- Recently, the world's first super charging city (Guangzhou) was launched and the Aion super charging and changing center was officially completed. It is planned that by 2025, by means of "self construction + cooperation and joint construction",
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- [Industry information]Smart meters are facing new opportunities! The State Council issued the opinions on promoting the urbanization construction with the county as an impo2022.11月.23 16:04
- In China, the county is an important part of the urban system and an important link between the city and the countryside. Promoting the construction of county towns is an important link in the process of urbanization in China. It is of great significance to promote the construction of new urbanization and the modernization of agriculture and rural areas.
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- [Industry information]Important | The new version of "Electric Vehicle AC Charging Pile Verification Regulations" has been released, and mandatory verification will be carr2022.11月.23 15:59
- Important | The new version of "Electric Vehicle AC Charging Pile Verification Regulations" has been released, and mandatory verification will be carried out from 2023
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- [Industry information]IRdopto participated in the 4th Shenzhen International Charging Station (Pile) Technology and Equipment Exhibition in 20202022.11月.23 15:44
- The Shenzhen Charging Pile Exhibition CPTE was grandly opened at the Shenzhen Convention and Exhibition Center from November 2 to 4.
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- [Company news]Good news! Aerida won the "Guangdong Charging Facilities Association-Member Unit"2022.11月.23 15:33
- On December 11, 2020, the annual grand ceremony and 2020 annual general meeting of Guangdong charging facilities association were held in Guangzhou Baiyun International Conference Center.
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- [Company news]Good news! Congratulations to iRdopto for winning the "High-tech Enterprise" certification2022.11月.23 15:29
- A high-tech enterprise is a special qualification established by the state to support and encourage the development of high-tech enterprises, adjust the industrial structure and enhance the national economic competitiveness. It occupies a very important strategic position in my country's economic development.
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- [Company news]Good news | IRDopto Optoelectronics won the title of "Guangdong Province Abiding by Contracts and Valuing Credit Enterprises"2022.11月.23 14:32
- Recently, the Shenzhen Municipal Market Supervision and Administration Bureau announced the list of "Guangdong Province's Contract-abiding and Credit-Reliable Enterprises" in 2021. With its honest and law-abiding business reputation, rigoro...
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Hot news
In the first quarter of 2022, the ...
- On April 11, the lates...
Making charging more convenient th...
- Recently, the world's ...
Smart meters are facing new opport...
- In China, the county i...
- 1In the first quarter of 2022, the sales volume of new energy vehicles totaled 1.257 million, with a year-on-year increase of 138.6%
- 2Making charging more convenient than refueling, Guangzhou will build the world's first "super charging city"
- 3Smart meters are facing new opportunities! The State Council issued the opinions on promoting the urbanization construction with the county as an impo
- 4Important | The new version of "Electric Vehicle AC Charging Pile Verification Regulations" has been released, and mandatory verification will be carr
- 5IRdopto participated in the 4th Shenzhen International Charging Station (Pile) Technology and Equipment Exhibition in 2020
- 6Good news! Aerida won the "Guangdong Charging Facilities Association-Member Unit"
- 7Good news! Congratulations to iRdopto for winning the "High-tech Enterprise" certification
- 8Good news | IRDopto Optoelectronics won the title of "Guangdong Province Abiding by Contracts and Valuing Credit Enterprises"
- 9New iRdopto products are coming! With 485 communication AC/DC power measurement module:IM1253C