Mianyang Weibo Electronic DJS5179 User manual

Instruction Manual of
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Sales tel: [phone]
Sales fax: [phone]
Executive standard: GB/T29318-2012
Address: No.98 Youxian East, Youxian District, Mianyang, Sichuan,
China
Code no.: 621000
E-mail: [email protected]
http://www.wbsensor.com
DJS5179 Electronic DC Energy Meter

DJS5179
Preface
Thank you for choosing DJS5179 Electronic DC Energy Meter. We hope that
this product can bring you a pleasant application experience.
If the package or product appearance is damaged when you receive the product,
please contact us or your supplier immediately.
In order to make this product work better and avoid unnecessary troubles caused
by inappropriate operation, please read this instruction manual carefully before
installing, using or maintaining the product.
Please keep this manual carefully for your future use.
Please read the safety instructions in the first section of this manual before
installing this product.
Please note that the content is subject to change without notice.

DJS5179
Catalogue
1.Safety usage instructions ....................................................................................................... 1
2. Product introduction ............................................................................................................. 2
2.1Summary ........................................................................................................................................... 2
2.2Product features ................................................................................................................................ 2
3 Structural features and operating principle ........................................................................ 3
4 Key technical parameters ...................................................................................................... 3
4.1 Key technical parameters ................................................................................................................ 3
4.2 Pulse Output ..................................................................................................................................... 4
5 Outline dimension .................................................................................................................. 4
6 Installation and usage ............................................................................................................ 5
6.1 Installation method .......................................................................................................................... 5
6.2 Installation precautions ................................................................................................................... 5
6.3 Wiring ............................................................................................................................................... 5
6.3.1 Terminals definition .............................................................................................................. 5
6.3.2 Power supply wiring ............................................................................................................. 7
6.3.3 Communication wiring ......................................................................................................... 7
6.3.4 Input wiring ........................................................................................................................... 7
6.3.5 Energy pulse output wiring .................................................................................................. 8
6.4 Usage ................................................................................................................................................. 9
6.4.1Panel description .................................................................................................................... 9
6.4.2 Button description ................................................................................................................ 9
6.5 Display .............................................................................................................................................. 9
6.5.1LCD backlight function ......................................................................................................... 9
6.5.2 LCD display description ..................................................................................................... 10
6.5.3 LCD display content ........................................................................................................... 10
7. Communication protocol .................................................................................................... 1 3 
7.1 MODBUS-RTU protocol ............................................................................................................... 14
7.1.1Summary .............................................................................................................................. 14
7.1.2 Function code description .................................................................................................. 15
7.1.3 Abnormal response ............................................................................................................. 16
7.1.4 Example of Communication Messages .............................................................................. 17
7.1.5 Parameter Register Table ................................................................................................... 19
7.2 DL/T645-2007 protocol.................................................................................................................. 31
7.2.1Summary .............................................................................................................................. 31
7.2.2 Frame format ...................................................................................................................... 32
7.2.3Data identification ............................................................................................................... 33
7.2.4Communication packet description.................................................................................... 39
8 Note ........................................................................................................................................ 45

DJS5169
9 After sales service ................................................................................................................. 45
9.1 New product quality assurance..................................................................................................... 45
9.2 Product warranty limit .................................................................................................................. 45
10 Package, transportation and storage ................................................................................ 46
10.1 Storage .......................................................................................................................................... 46
10.2 Transportation and storage ......................................................................................................... 46
Complimentary clause ............................................................................................................ 46

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1
1.Safety usage instructions
This instruction manual is used to describe DJS5169 DC Energy Meter. Please read this
instruction manual carefully before installing, operating and maintaining this product. You are
supposed to have basic knowledge in electrical engineering area by this instruction manual.
The input terminals of this product may carry dangerous voltage during installation and usage,
so the input signal and power must be cut off before any internal or external operation of this
product.
The following special information may appear on this manual or on the product to alert you to
potential hazards or to remind you of safe operation. Any installation and maintenance work must
be performed by a professional.
Danger
Indicating potential dangerous situations which may cause death or serious injury if it is
not obeyed.
Warning
Indicating potential dangerous situations which may cause damage to the equipment if it is
not obeyed.
Attention
Providing other helpful information which is not mentioned in Danger and Warning.
Attention
● The product is an integrated structure, and the internal components are matched and
calibrated;
● Do not damage or modify the label or logo of the product, do not disassemble or
modify the product;
● This product cannot be recycled when it is discarded. Please contact a qualified
recycling department for disposal.
Warning
This instruction is not intended for use as an operational reference by untrained personnel.
The company will try its best to solve the problems caused by the outside of its normal use,
but does not assume the relevant safety responsibility.

DJS5179
2. Product introduction
2.1Summary
DJS5179 Electronic DC Energy Meter is a new generation of programmable intelligent
instrument. The instrument supports DC signal monitoring of two channels voltage and two
channels current. It can be widely applied to DC signal equipment such as DC charging pile and DC
power supply. Equipped with one channel RS485 communication interface, this instrument supports
MODBUS-RTU and DL/T645-2007 communication protocol.
DJS5169 Electronic DC Energy Meter complies with the following standards:
GB/T 29318—2012 “Electric vehicle non-vehicle charger energy metering”;
JJG 842-1993 "DC electronic energy meter";
DL/T 645—2007 “Multi-function energy meter communication protocol”;
MODBUS-RTU communication protocol.
2.2Product features
As an advanced intelligent and digital power grid front-end acquisition component, the DC
Energy Meter mainly monitors the voltage, current, power, and electronic energy in the electrical
circuit in real time. The instrument integrates multi-circuit measurement, display, and
communication. The advantages of this instrument are high measurement accuracy, wide measuring
range, good stability, long-term work free adjustment, programmable parameter setting, etc. The
product follows the development trend of digital, modular, and networked DIN-rail digital display
meters. It is cost-effective and the function combination is simple and practical.
● Full parameter measurement and multiple energy accumulation;
●The input signals between the roads achieve electrical safety isolation;
● Strict EMC and safety protection design and higher reliability;
● High input impedance voltage sampling scheme (≥3MΩ), which has little effect on the
measured line;
● Fast response, data update time (<100ms) and real-time monitoring of grid load changes;

DJS5179
3
● 2 channel electric energy pulse output, 1 channel second pulse output.
3 Structural features and operating principle
The structure of the instrument adopts modular structure design and optional auxiliary power
functions. The instrument adopts guide rail structure design, which is suitable for NS35/7.5,
NS35/15 or European EN50022 standard guide rails. It is easy to install and has strong versatility.
The MCU samples the input signal in real time, performs data processing on the sampling
result and displays it, and communicates with the host computer through the RS485 interface to
realize networking.
4 Key technical parameters
4.1 Key technical parameters
The key technical parameters of this instrument are shown in Table 1.
Table 1 Key Technical Parameters
Technical parameters Parameters
Accuracy
class
Voltage Class 0.2
Current Class 0.2
Energy Class 0.5
Input
Measurement signal 2 channels DC voltage and 2 channels DC current
Voltage
Input scope DC 0～1000V
Linear measurement
range
10%Un～120%Un（Un is rated voltage）
Power consumption < 0.5W
Current
Input scope
DC shunt input current: (Chosen by customer)
100A-500A
DC shunt output voltage: 75mV
Linear measurement
range
1%In～120%In（In is rated current）
Power consumption < 0.1W
Display Displaying method LCD displaying
Power
supply
Voltage scope DC +12V /+24V
Power consumption ≤2W

DJS5179
Ambient
temperature
Operating temperature -25℃～+55℃
Limit operating temperature -40℃～+70℃
Storage temperature -40℃～+70℃
Relative humidity 5%~95%, no condensation and corrosive gases
4.2 Pulse Output
The instrument has 2 channel electric energy pulse output and 1 channel second pulse output,
and the output mode is the open collector optocoupler output. The open collector voltage is VCC ≤
30V, the current IZ ≤ 20mA, and the pulse width should meet the requirements of 80ms ± 20ms.
5 Outline dimension
The outline dimension of this instrument is shown in Figure 1. Unit: mm, tolerance: ±0.5mm.
Figure1 Outline dimension

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6 Installation and usage
6.1 Installation method
The instrument is lead rail mounted and the width of the lead rail is 35mm.
6.2 Installation precautions
● The product shall be installed in a dry, well ventilated place away from heat and strong
electricity (magnetic) fields.
● Working ambient temperature: -25℃ ～+55℃, humidity: 5%~95% (without condensation).
● It must be installed securely in order to prevent safety accidents caused by vibration.
●Sufficient space shall be reserved around the installation location considering the convenience
and safety for installation and maintenance operations.
● Due to the convenience and safety of installation and maintenance operations, sufficient
space should be left around the installation location of the instrument;
● Electrical connection line requirements: 1.5m2 shielded twisted pair cable is recommended
for the DC shunt mV signal output connection line. The distance between the shunt and the
instrument should not be too long. It is recommended that the line length be within 1m. The
voltage input line and power line should be 1.5mm2 multi-strand flame-retardant copper wire;
1.0mm2 shielded twisted pair cable for RS485 communication;
● Electrical connection requirements: It is recommended to connect a suitable fuse (such as 1A
fuse) to the instrument voltage input circuit.
6.3 Wiring
6.3.1 Terminals definition
Wiring terminals diagram of this instrument is shown in Figure 2 and wiring terminals
definition is shown in Table 2.

DJS5179
Figure 2 Outline of the instrument
Table 2 Wiring terminals definition
Function code Description
+E Power supply positive terminal
GND Power supply ground terminal
RSA RS485communication interface terminal A
RSB RS485communication interface terminal B
U1+ Positive voltage output of Circuit 1
U1- Negative voltage output of Circuit 1
I1+ mV Positive current input of Circuit 1
I1- mV Negative current input of Circuit 1
U2+ Positive voltage output of Circuit 2