Njoy DDSU666 User manual
DDSU666
User manual
SIAMETER1P666CU01H
Before using this product, carefully read all product documentaon and retain it for future reference.
322.10.23.0
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Please read this manual before using the product.
NOTE!
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nJoy inverters models that are compable with this product:
A Smart Meter is a bidireconal device that records the load curve and controls
the various energy ows, giving highly accurate measurements and rapid
communicaon through the chosen communicaon network.
Ascet Series Hybrid inverter
Monophase
Astris Series Grid-ed inverter
Monophase
5k/6K
2K/3K/4K/5K/6K/ 7K/8K/10K
3
Brief Introduction1
1.1. Main applicaon & applicable range
Type DDSU666 single phase electronic energy meter (din-rail) (hereinaer
referred to as the “instrument”) is designed based on power monitoring and
energy metering demands for electric power system, communicaon industry,
construcon industry, etc. as a new generaon of intelligent instrument
combining measurement and communicaon funcon, mainly applied into the
measurement and display for the electric parameters in the electric circuit
including voltage, current, power, frequency, power factor, acve energy,
etc. The network can be realized through RS485 communicaon interface
and external device. Adopng the standard DIN35mm din rail mounng
and modular design, it is characterized with small volume, easy installaon
and easy networking, widely applied into the internal energy monitoring and
assessment for industrial and mining enterprises, hotels, schools, large public
buildings.
1.2. Product Features
1) Metering the posive and negave acve power.
2) Adopng wide LCD, it has clear vision.
3) RS485 communicaon funcon with communicaon protocol complied
with Modbus-RTU.
4) Adopng DIN35mm standard din rail mounng, structural modular design,
it is characterized with small volume, easy installaon and easy networking.
1.3 Model composion and meanings
Figure 1 Model No. & meanings
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1.4 Applicable environmental condion.
Regulated working temperature range: -25°~C+60°C
Limited working temperature range: -35°C~+70°C
Relave humidity(Annually average):75%
Atmospheric pressure:86kPa~106kPa
The working principle block diagram of the instrument is shown in gure 2:
3.1 Model specicaon
Working Principle
Main Technical Performance & Parameters
2
3
NOTE!
Please take the physical sign as standard.
Figure 2 Work principle block diagram
Table 1 Model specicaon
Model Accuracy
class Frequency Reference
voltage
Current
specicaon
Instrument
constant Type
DDSU666.004.0004 Acve
Class 1 60Hz 230 V 5(80)A 800imp/
kWh
Direct
connecon
DDSU666.004.0004 Acve
Class1 60Hz 230 V 1.5(6)A 6400imp/
kWh
Via
transformer
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3.2Percentage error
3.3 Start
3.4 Deucon
Type Current range Power factor
Percentage error limit of
each class
instrument (%)
Class 1
Via CT
0.01In≤I<0.05In 1±1.5
0.05In≤I≤Imax 1±1.0
0.02In≤I<0.1In 0.5L, 0.8C ±1.5
0.1In≤I≤Imax 0.5L, 0.8C ±1.0
Direct connecon
0.05Ib≤I<0.1Ib 1±1.5
0.1Ib≤I≤Imax 1±1.0
0.01Ib≤I<0.2Ib 0.5L, 0.8C ±1.5
0.2Ib≤I≤Imax 0.5L, 0.8C ±1.0
Instrument
Accuracy class of the energy meter
Power factor
Class 1
Direct connecon 0.004Ib
1
Via transformer 0.002In
NOTE!
In: secondary rated current of the current transformer; Ib: calibrated current
of the meter;
L:inducve; C: capacive;
The electric energy meter should have good an-deucon logic. When the
voltage loop with 1.15 mes of referenced voltage and the current loop is
disconnected, the energy will not produce more than one pulse.
Table 3 Under the referenced voltage and table 4, the energy meter can be started and
connuously measure the energy
Table 2 Percentage error of single phase energy meter not exceeding the below corresponding
limited value
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3.5 Deucon
3.6 Other technical parameters
3.7 Adopon for key components
Specied operang voltage range 0.9Un~1.1Un
Extended operang voltage range 0.8Un~1.15Un
Ulmate operang voltage range 0 Un~1.15Un
Power consumpon of the voltage circuit ≤1W/8VA
Power consumpon of the current circuit ≤2.5VA
Measuring range 0~999999.99 kWh (only display 6 bit, automac shi
of decimal point)
Display mode LCD display
Communicaon
protocol Modbus-RTU protocol
Metering chip SH79F7019
Crystal 32.768kHz
Power transformer ZTY6.170.234
Printed wiring board
1.5 (6) A:ZTY8.067.2729V2, ZTY8.067.2731V2,
ZTY8.067.2732V2
5 (80) A : ZTY8.067.2729V2, ZTY8.067.2730V2
Current transformer ZTY6.176.301
Table 4 Electrical parameters
Table 5 Other technical parameters
Table 6 Adopon for key components
NOTE!
The actual plate number is determined according to the actual sample table.
Main functions4
4.1 Metering funcon
4.2 Displayed funcons
1) Accurately metering the posive and negave acve power;
2) The storage data of the electric energy meter will not lost aer powering
o.
When the energy meter is in normal working condion (on load state), the
posive pulse indicator should be ashed. If long me for no ashing or light
for the indicator, please check whether the wiring mode of the energy meter
is right or not.
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Symbol Meaning
VThe unit of the voltage, the display data of indicang LCD is voltage
AThe unit of the current, the display data of indicang LCD is current
WThe unit of the acve power, the display data of indicang LCD is acve power
var The unit of the reacve power, the display data of indicang LCD is reacve
power
Hz The unit of the frequency, the display data of indicang LCD is frequency
kWh The unit of the acve energy, the display data of indicang LCD is acve energy
Table 7 LCD logo meanings
The display me of the measurement data is ve seconds and informaon
sample for every page of the measured informaon of measurement data (if
not consistent with the instrument panel, please take the object as standard.)
Light me of the background: 1 min.
Display
interface Instrucon
Means the current display voltage is U, the unit is “V”,
the le picture is U=220.0V
Means the current display current is I, the unit is “A”,
the le picture is I=5.000A.
Means the current display is the acve power P, the
unit is “kW”, the le picture is P=1.100kW.
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Means the current display is the power factor Ft, the
le picture is Ft=1.000.
Means the current display is frequency F, the le
picture is F=50.00Hz.
Means the current posive acve energy EImp, the
unit is “kWh”, the le picture is EImp=1.20kWh.
Means the current negave acve energy EExp, the
unit is “kWh”, the le picture is EExp=1.00kWh.
Means the current combinaon acve energy total
ComEp, the unit is “kWh”, the le picture is ComE-
p=2.20kWh.
Means the current communicaon protocol is Modbus.
Represents 8 data bits, no eect bit and one stop bit of
the current communicaon protocol.
Means the current communicaon address is 11.
Means the current communicaon baud rate is 9600.
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4.3 Communicaon funcon
Figure 3 Long press buon
Keyboard operaon: Aer pressing the buon for a long me, the display
interface enters the switching interface of seng 645 protocol and Modbus
protocol. Shortly press can switch the protocol, not the address page (only
the ModBus protocol can be switched to the address page), the address of
ModBus can be set by the buon, the buon can set the address range 1-99
The instrument adopts RS485 communicaon mode with baud rate to be
set as 1200, 2400bps, 4800bps and 9600bps.For a same communicaon
circuit, it can at most be connected with thirty-two instruments at the same
me, with each instrument to be set as their communicaon address. For the
communicaon connecon, it should use shielded twisted pair with copper
mesh with wire diameter not below 0.5mm2 . On wiring arrangement, the
communicaon line shall be away from strong cable or other strong electric
eld with the maximum transmission distance to be 1200m. For the typical
networking connecon mode, please see the below gure, users can select
other suitable connecon mode based on detailed condions.
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Figure 4 Schemac diagram of communicaon connecon
When the instrument is set to be ModBus-RTU transmission mode,
ModBus-RTU communicaon protocol adopts host-slave response in one
communicaon line. Firstly, the host computer’s signal will seek for a terminal
device (slave) with only one address, then the terminal device will produce
response signal and transmit to the host computer in opposite direcon, that is,
half duplex working mode. This protocal only allows communicaon between
the host (PC, PLC, etc.) and the terminal device, rather than data exchanges
between the independent terminal devices. Thus, each terminal device will not
occupy the communicaon circuits in their inializaon, and only be limited to
response the query signal to the host computer. The instrument can provide
ModBus-RTU communicaon protocol (see appendix A), for the parameter
informaon to be read or modied by the communicaon, please see the
below table.
Parameter
address
Parameter
code
Instrucon of the
parameters
Type of data Length of data
Word
Read&write
aributes
0000H UCode Programming
password codE
16-bit with
symbols 1R/W
0001H REV. Reserved, actual
read is the
version number
16-bit with
symbols 1 R
0002H ClrE Electric energy
zero clearing
CLr.E(1:zero
clearing)
16-bit with
symbols 1R/W
0003H RESERVED RESERVED 16-bit with
symbols 1
0004H RESERVED RESERVED 16-bit with
symbols 1
0005H ChangePro-
tocol
Protocol chang-
ing-over
16-bit with
symbols 1R/W
This manual suits for next models
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