1 Product Overview

The DAQ-LP-CT4G wireless current acquisition sensor terminal is equipped with a low-power, high- sensitivity open-type transformer . It converts the large current on the primary side into a small current on the secondary side through the principle of electromagnetic induction, and is then used for current monitoring . It can sensitively detect the size of the line current and report data to the designated platform server wirelessly at regular intervals .

The terminal adopts GPRS/NB-IOT/LoRa communication mode to overcome the wireless communication obstruction caused by the special environment on site, greatly simplifying the on-site deployment time and reducing construction costs . The working status of the equipment is divided into three states: sleep , collection and storage , and activation and reporting . This terminal is equipped with a variety of open-close transformers, a wide range of measured current, high-quality magnetic core materials, an open-close structure, and is easy to install. It is used for current monitoring and collection in AC motors, lighting equipment, air compressors, heating, ventilation and air conditioning equipment, building automatic control systems, industrial city networks, rural power grid transformation projects and other scenarios .

2 Ordering specifications and selection

3 Service Concept

Our company solemnly promises:

You buy not only the product, but also the meticulous and thoughtful technical support service ! ! ! ( =^_^= )

This product only needs ordinary workers to connect the power and install it on site! No debugging is required!

We provide free remote guidance, remote configuration and debugging services, and send data to the user's designated cloud platform.

Free IoT solution consulting services!

4 Product Features

4.1 Acquisition characteristics

Collection type : AC (DC can be customized)

Range : 0 ~ 50A/ 100A (other ranges can be customized)

Number of channels: 1 channel current acquisition

Collection frequency : 1 minute ~ 24 hours, support remote configuration

Accuracy level: ±2%

Resolution: 0.1A

Maximum input: 100% (continuous) / 150% (1 minute)

4.2 Electrical Characteristics

Power supply: battery powered/12V DC/220V AC

Battery capacity : 3.6V*19Ah

Standby power consumption: less than 5uA@3.6V

Working power consumption: 2 ~ 3mA@3.6V

Transmitting power consumption: 50 ~ 100mA@3.6VV

Insulation impedance: >100MΩ (primary/secondary)

4.3 Communication characteristics

Antenna type: external antenna (internal antenna optional)

Transmission mode: GPRS/NB-IOT/LoRa

Communication protocol : Customizable TCP/UDP/HTTP/MQTT, etc.

Data forwarding: any public network server

Data reporting method : Report current measurement values at fixed intervals

4.4 Structural characteristics

Material: PC plastic (shell)

Main protection level: IP 65

Body size: 120 mm × 78 mm × 50 mm

Transformer probe structure : open type

Main installation method: wall hanging or screw fastening

Transformer probe installation method: hanging installation

4.5 Work Environment

Temperature -25 °C ~ 75 °C, humidity 0 ~ 95 % (non-condensing)

5 Micro power operation mode

The wireless current collection terminal achieves power saving by working intermittently. The device is in standby mode most of the time, and only a very small part of the circuit continues to work to maintain micro-power consumption. This part of the circuit will ensure the correct operation of the system time and the correct recording of the next activation time.

Calculation of daily power consumption of equipment : The daily working state is divided into standby state and working state, corresponding to the power consumption data of different states.

6 Core advantages of products

Ø Comes with its own battery, no wiring required

Ø Simple installation and quick deployment help IoT projects to be implemented quickly

Ø Support any IoT cloud platform and provide data connection

Ø Non-intrusive measurement, does not affect the normal operation of the equipment

Ø The whole machine is waterproof and moisture-proof to meet the working requirements in harsh environments

Ø Support remote configuration to minimize on-site maintenance costs

7 Data reporting communication protocol

7.1 Protocol analysis instructions

HTTP post push method, users need to provide http data receiving URL to receive data.

Example of a data message in JSON format:

{"VoltageCur":376,"TmpWidth":254,"TimePeriod":254,"MinCntSet":1,"IntData3":-9999,"IntDat a2":168,"IntData1":1,"InfoId":1,"ICCID":"1119205006447538","Extend2":16890,"Extend1":23}

Message analysis:

{

    "VoltageCur" : 36 7 , //Battery voltage, 367 represents 3.67V

    "TmpWidth" : 254 , //Used to set the current hysteresis, unit 0.1 A, for example, set 20 to 2 A, and report data when the current change exceeds 2A

    "TimePeriod" : 254 , // Collection period, the range of the collection period can be set to 1-255s, and the collection is done every fixed T

    "MinCntSet" : 1 , //Force upload time, unit 5min, default 48, i.e. 48*5=240min=4 hours (with a certain error)

    "IntData3" : -9999 , //Reserve data field, invalid

    "IntData2" : 168 , //current value, 168 represents 16.8A

    "IntData1" : 1 , //Reserved field

    "InfoId" : 1 , //Reserved field, fixed to 1

    "ICCID" : "1119205006447538" , //ID number

    "Extend2" : 16890 , // represents the cumulative number of sensor reports

    "Extend1" : 23 //Signal strength

}

7.2 Protocol connection test

You can use postman to debug.

7.3 Protocol customization

If you need to customize other docking protocols, such as MQTT, docking configuration software, etc., you can contact the business personnel for communication.

8 Platform docking

8.1 Platform data display

The product can be connected to our company's designated open industrial Internet of Things platform when it leaves the factory. The platform interface is as follows:

Computer browser interface

WeChat access interface on mobile phone

8.2 User-specified platform

The default connection is to the Telecom IoT platform. Other platforms can be customized.

9 Application Cases

Equipment working time monitoring

Current monitoring

10 Precautions

(1) The transformer probe of the product is not waterproof. If it is used outdoors, it needs to be waterproofed.

(2) This product has a built-in SIM card, and the annual traffic fee is approximately 10 to 20 yuan depending on the frequency of reported data.