Heyuan Intelligence DZ81-MS3UI7E3 User manual

DZ81-MS3UI7E3
Power Meter
User Manual
V2.0
Heyuan Intelligence Technology Co., Ltd

IMPORTANT DECLARATIONS
Copyright © 2018 Heyuan Intelligence Technology Co., Ltd All Rights Reserved
This manual may not be reproduced, copied, transmitted or transcribed in whole or in part by any
means without the expressed written permission of Heyuan. Any shall be investigated for legal
responsibility in violation of copyright or other intellectual property rights of the Company. We check
the user manual’s contents regularly and will make necessary amendments in next version. Welcome
to give advice for some unexpected errors. The rights of upgrading without notice are reserved.
Please read this manual carefully before the product is operated. And once you start operating the
meter, you’ll be considered to have read this manual and accept all our terms. Heyuan shall not be
responsible or liable for any damages or injuries caused by improper meter installation and/or
operation.
Attention: the following symbols in this manual refer to meanings as follows
Electric Shock Symbol: Carries information about procedures which must be followed
to reduce the risk of electric shock and danger to personal health
Safety Alert Symbol: Carries information about circumstances which if not considered
may result in injury or death
The meter must be installed and operated by one who has experience with high-voltage devices or
has qualifications. Please connect the meter to correct voltage before operating the meter. Please
install and use the meter according to the user manual. Heyuan shall not be responsible or liable for
any damages or injuries caused without following the instructions in the user manual.

Contents
Chapter 1 Meter Overview………………………………………………………………………………...1
Chapter 2 Specifications…………………………………………………………………………………..1
2.1 Input Voltage ………………………………………………………………..........................1
2.2 Input Current ……………………………………………………………………………….....1
2.3 Frequency Measurement ……………………………………………………………………1
2.4 Accuracy ………………………………………………………………………………………1
2.5 Communication ……………………………………………………………………………….1
2.6 Power Supply …………………………………………………………………………………1
2.7 Working Condition ……………………………………………………………………………2
2.8 Pulse Output ………………………..………………………………………………………...2
2.9 Input Voltage ………………………..………………………………………………………...2
2.10 Input Current ………………………..……………………………………………………….2
Chapter 3 Dimension & Installation …………………………………………………….………………2
3.1 External Dimension (unit: mm) ……………………………………………………..……….2
3.2 Cutout Size (unit: mm) ………………………..……………………………………………..2
3.3 Installation Method …………………………………………………………………………...2
Chapter 4 Terminals ……………………………………………………………………………………….3
Chapter 5 Typical Wiring ………………………………………………………………………………….3
5.1 Voltage and Current Wiring Instruction………………………..……………………………3
5.2 Digital Input Wiring………………………..…………………………………………………..5
5.3 Energy Pulse Wiring Mode ………………………..………………………………………...5
5.4 RS485 Communication Interface ………………………..………………………………….5
5.5 Power Supply ………………………..………………………………………………………..5
Chapter 6 Meter Display …………………………………………………………………………………..5
6.1 Parameters Display ……………………………..……………………………………………5
Chapter 7 Meter Operation ……………………………………………………….................................6
7.1 System Parameter Setting …………………………………………………..………………6
7.2 Parameters Setting Steps …………………………………………………………………...7
Chapter 8 System Parameters…………………………………………………..................................11
8.1 Basically Measured Parameters Zone (Function Code 03
Read) …………….............11
8.2 Basically Set Parameters Zone (Function Code 03 Read) …………….......................13
8.3 Real-time Clock Zone (Function Code 0x10 Write; Function Code 03/04 Read) .......13
8.4 Real-time Energy Zone (Function Code 03/04 Read) ……………..............................14
Chapter 9 After-sales Service …………………………………………………..……………………...15
Chapter 10 Contact Us …………………………………………………………..……....………………15

1
Chapter 1 Meter Overview
DZ81-MS3UI7E3 is an advanced, smart networked energy meter. It is widely used in power
distribution sites, energy management systems and intelligent monitoring systems of different
industries. Measuring all parameters: three phase/line voltage, three phase current, active power,
reactive power, power factor, frequency, multi-tariff, total active/reactive energy etc. It has 4-channel
digital inputs and supports standard Modbus RTU communication protocol.
Display: LED Display
Chapter 2 Specifications
2.1 Input Voltage
Reference Voltage: 3×220V Voltage Range: 0~1.2Un
2.2 Input Current
Measuring Range: 1‰In~6In Starting Current: 1‰In Secondary Current of CT: 1(5)A
2.3 Frequency Measurement
Frequency Measuring Range: 45~65Hz
2.4 Accuracy
Voltage/Current Accuracy Class: 0.2%
Energy Accuracy Class: Class 0.5S
Power Factor: 0.1%
Frequency: ±0.01Hz
2.5 Communication
RS485/Modbus-RTU Communication Protocol Baud Rate: 2400~9600bps (programmable)
Remark: DZ81-MS3UI7E3 is equipped with asynchronous half-duplex RS485 communication interfaces. The address
number can be modified. DZ81-MS3UI7E3 adopts Modbus RTU communication protocol to communicate. The terminals
are 485A and 485B. The communication connection should use shielded twisted wire covered with copper net. In addition,
the RS485 interfaces can also be used for device maintenance and upgrading. The communication default values are as
follows
Communication Default Value
Address
Baud Rate
Data Bits
Stop Bits
Parity
001
9600bps
8
1
No
2.6 Power Supply
Power Supply: AC85~265V/ DC85～300V DC Power Consumption: <3VA

2
Power-line Connection Terminals: L/+ and N/-
Remark: Terminals for the power supply are (L/+, N/-). If the quality of power is poor or there is an EMI problem, it’s
recommended to equip an EMC filter in the auxiliary power supply loop to increase resistance to interference.
2.7 Working Condition
Operating Temperature: -20℃～+70℃ Storage Temperature: -40℃～+80℃
Relative Humidity: 20%～90%(non-condensing)
2.8 Pulse Output
Pulse Constant: 6400imp/kWh
2.9 Input Voltage
Input voltage should not be over rated input voltage. Otherwise, PT should be taken into account.
Please make sure input voltage be in accordance with input current, that is the phase number should
be same. Otherwise, value error will occur.
2.10 Input Current
The rated input current is 5A. If current is over 5A, external CTs should be used. When opening the
meter or changing current wiring, please make sure that the primary circuit is powered off.
Chapter 3 Dimension & Installation
3.1 External Dimension (unit: mm) 3.2 Cutout Size (unit: mm)
Front View Side View Cutout Size
Model No.
Dimension(mm)
Cut-out Size
MS3UI7E3
L.
W.
H.
L.
W.
72
72
87.2
68
68
3.3 Installation Method
This series of products should be installed in a dry and dust free environment, and avoid exposing
to excessive heat, radiation and high electrical noise source. The meters can be installed into a

3
standard panel of switch cabinet.
A. Remove the clips from the meter and insert the meter into the panel from the front side. Make
sure that the screen is at the front of the panel.
B. Install clips on the back side of the meter and fix tightly to ensure the meter is affixed to the panel.
Chapter 4 Terminals
QE-
QE+
PE-
PE+
NC
485B
485A
NC
N/-
L/+
1
2
3
4
5
6
7
8
9
10
Energy Pulse Output
RS485
Communication
Power Supply
Upper Row of Terminals
Ua
Ub
Uc
Un
Ia
Ia*
Ib
Ib*
Ic
Ic*
21
22
23
24
25
26
27
28
29
30
Voltage Input
Current Input
Lower Row of Terminals
DICOM
DI1
DI2
DI3
DI4
NC
NC
NC
NC
NC
11
12
13
14
15
16
17
18
19
20
Digital Input
Extended Terminals
Chapter 5 Typical Wiring
5.1 Voltage and Current Wiring Instruction
A. Three-phase Four-wire Wiring Mode in Low Voltage
A
B
C
N
3029282726252423
Ub Ia*Ia
Ua Uc Un
2221
Ib*Ib Ic*Ic
*
*
*

4
B. Three-Phase Three-Line Wiring Mode in Low Voltage
A
B
C
3029282726252423
Ub Ia*Ia
Ua Uc Un
2221
Ib*Ib Ic*Ic
*
*
C. Three-Phase Four-Line Wiring Mode in High Voltage
A
B
C
3029282726252423
Ub Ia*Ia
Ua Uc Un
2221
Ib*Ib Ic*Ic
*
*
*
*
*
*
*
*
*
N
D. Three-Phase Three-Line Wiring Mode in High Voltage
A
B
C
3029282726252423
Ub Ia*Ia
Ua Uc Un
2221
Ib*Ib Ic*Ic
*
*
*
*
*
*

5
5.2 Digital Input Wiring 5.3 Energy Pulse Wiring Mode
3 4
PE- PE+
Vi
+
-
1 2
QE- QE+
Vi
+
-
Vi<30V
i<10mA
Vi<30V
i<10mA
5.4 RS485 Communication Interface 5.5 Power Supply
6 7
485B 485A
910
L/+N/-
Chapter 6 Meter Display
There are four buttons on the front panel, labeled left shift button “ ”, plus button “P”, button “ ”,
minus button “ ” and confirm button “ ” from left to right. It can be used for reading different
real-time data and setting parameters though the four buttons.
6.1 Parameters Display
6.1.1 Press button “ ”, it will cyclically display the values of phase voltage, line voltage, current
and digital inputs.

6
V
U
UL
V
A
I
Phase Voltage Line Voltage Current Digital Inputs
6.1.2 Press button “ ”, it will cyclically display the values of energy parameters, including total
active energy values and total reactive energy values. In interfaces below, the Ep: 1234567.8kWh,
Eq: 1234567.8kVarh.
kWh
Active Energy Reactive Energy
6.1.3 Press button “ ”, it will cyclically display the values of active power, reactive power, power
factor and frequency.
kW
kVar
-
-
-
PF
Hz
Active Power Reactive Power Power Factor Frequency
Chapter 7 Meter Operation
7.1 System Parameter Setting
Press “ ” and “ ” simultaneously at any display interface of metering data, it will enter the
parameter setting interface.
At the setting mode:
The button “ ” is used for digital shift. Press button “ ” each time to shift one digit left, which
will flash at the same time.
The button “ ” is used to plus 1. Press button “ ” each time and the flashing digit plus 1. If the

7
flashing digit is 9, press button " " and the digit will become 0.
The button " " is used to minus 1. Press button “ ” each time and the flashing digit minus 1. If
the flashing digit is 0, press button " " and the digit will become 9.
The button “ ” is used to confirm the setting and switch to the next setting interface. When
switching to last interface, press button “ ” again to switch back to the password setting interface.
Press button “ ” and “ ” simultaneously at any setting interface, it will exit the setting interface
and switch back to the parameter display interface.
7.2 Parameters Setting Steps
7.2.1 Password Inquiry Interface
Press buttons “ ” and “ ” simultaneously, it will enter “PASS” (password inquiry) interface. The
default password is “0000”. The methods of entering password are as follows
Step 1. Press button “ ” or button “ ” to change value of the first digit, which ranges from 0 to 9.
Step 2. Press button “ ” to shift digits left.
Step 3. Repeat step 1 and step 2 until the last digit. Change and confirm. If the password is correct,
confirm and enter communication address interface.
7.2.2 Communication Address Setting Interface
This interface displays the present communication address, whose value ranges from 1 to 247. The
default address is “001” The setting methods are as follows.
Step 1. Press button “ ” or button “ ” to change value of the first digit, which ranges from 0 to 9.

8
Step 2. Press button “ ” to shift digits left.
Step 3. Repeat step 1 and step 2 until the last digit. After setting, press button “ ” to confirm and
enter baud rate setting interface.
7.2.3 Baud Rate Setting Interface
The baud rate can be set as 9600, 4800, 2400 and 1200. The default baud rate is “9600”. The setting
methods are as follows.
Step 1. Press button “ ” or button “ ” to change baud rate until choose the needed one.
Step 2. After setting, press button “ ” to confirm and enter parity check setting interface.
7.2.4 Parity Check Setting Interface
The parity check can be set as and “8n1”, “8e1” and “8e1”. “8n1” refers to no parity, 8 data bits and
1 stop bit. “8e1” refers to even parity, 8 data bits and 1 stop bit. “8o1” refers to odd parity, 8 data bits
and 1 stop bit. The setting methods are as follows.
Step 1. Press button “ ” or button “ ” to change parity check until choose the needed one.
Step 2. After setting, press button “ ” to confirm and enter voltage wiring mode setting interface.
7.2.5 Voltage Wiring Mode Setting Interface
There are 2 options for the voltage wiring modes, i.e. “3Ln” referring to 3-phase 4-wire wiring mode;
and “2LL” referring to 3-phase 3-wire wiring mode. The setting methods are as follows.

9
Step 1. Press button “ ” or button “ ” to change voltage wiring mode until choose the needed
one.
Step 2. After setting, press button “ ” to confirm and enter current wiring mode setting interface.
7.2.6 Current Wiring Mode Setting Interface
There are 2 options for the current wiring modes, i.e. “3C” referring to 3 CTs used for current wiring;
“2C” referring to 2 CTs used for current wiring to calculate phase B current in three-phase balanced
environment (some model numbers don’t support this option). The setting methods are as follows.
Step 1. Press button “ ” or button “ ” to change current wiring mode until choose the needed
one.
Step 2. After setting, press button “ ” to confirm and enter PT ratio setting interface.
After setting, press button “ ” to confirm and enter “F5” interface.
7.2.7 PT Ratio Setting Interface
This interface displays the present PT ratio, whose value ranges from 1 to 9999. The setting methods
are as follows.
Step 1. Press button “ ” or button “ ” to change value of the first digit, which ranges from 0 to 9.
Step 2. Press button “ ” to shift digits left.
Step 3. Repeat step 1 and step 2 until the last digit. Change and confirm.
Step 2. After setting, press button “ ” to confirm and enter CT ratio setting interface.
7.2.8 CT Ratio Setting Interface

10
This interface displays the present CT ratio, whose value ranges from 1 to 9999. The setting methods
are as follows.
Step 1. Press button “ ” or button “ ” to change value of the first digit, which ranges from 0 to 9.
Step 2. Press button “ ” to shift digits left.
Step 3. Repeat step 1 and step 2 until the last digit. Change and confirm.
Step 2. After setting, press button “ ” to confirm and enter password inquiry interface.
7.2.9 Energy Ratio Switch Setting Interface
Enter password inquiry interface, input password “1111” and enter energy ratio switch setting
interface. “1” referring to open state of the energy ratio switch, which means the energy value on the
energy interface is the real primary energy value. “0” referring to closed state of the energy ratio
switch, which means the energy value on the energy interface is the secondary energy value through
CTs. Open primary energy value display and close secondary energy value display. After setting,
press button “ ” to confirm and enter decimal place setting interface.
7.2.10 Decimal Place Setting Interface
This interface displays the energy decimal places, which can be set as 1, 2 or 3 places. After setting,
press button “ ” to confirm and enter voltage display interface.
Setting examples:
If the PT ratio is 10kV/400V, the PT ratio will be 25, that is to divide 10,000 by 400.
Remark: The product of PT ratio and CT ratio is not more than 300,000.

11
Chapter 8 System Parameters
8.1 Basically Measured Parameters Zone (Function Code 03 Read)
Address
(DEC)
Address
(HEX)
Category
Parameter
Default
Value
Range
4096
1000
Phase
Voltage
phase A voltage
magnifying
100 times
0～65535
4097
1001
phase B voltage
magnifying
100 times
0～65535
4098
1002
phase C voltage
magnifying
100 times
0～65535
4099
1003
phase voltage mean value
magnifying
100 times
0～65535
4100
1004
zero sequence voltage
magnifying
100 times
0～65535
4101
1005
Line
Voltage
line voltage(A-B)
magnifying
100 times
0～65535
4102
1006
line voltage(B-C)
magnifying
100 times
0～65535
4103
1007
line voltage(C-A)
magnifying
100 times
0～65535
4104
1008
line voltage mean value
magnifying
100 times
0～65535
4105
1009
Current
phase/line Current of phase
A
magnifying
1000 times
0～65535
4106
100A
phase/line Current of phase
B
magnifying
1000 times
0～65535
4107
100B
phase/line Current of phase
C
magnifying
1000 times
0～65535
4108
100C
phase/line Current mean
value
magnifying
1000 times
0～65535
4109
100D
zero sequence current
magnifying
1000 times
0～65535
4110
100E
Active
Power
active power of phase A
magnifying
1000 times
-32768～
32767
4111
100F
active power of phase B
magnifying
1000 times
-32768～
32767
4112
1010
active power of phase C
magnifying
1000 times
-32768～
32767
4113
1011
total three-phase active
power
magnifying
1000 times
-32768～
32767

12
8.2 Basically Set Parameters Zone (Function Code 03 Read)
Address
(DEC)
Address
(HEX)
Category
Parameter
Default
Value Range
8192
2000
Basic
Parameters
password protection
(protection of basic
parameters)
0
0～9999
8193
2001
meter
communication
address
1
1～247
4114
1012
Reactive
Power
reactive power of phase A
magnifying
1000 times
-32768～
32767
4115
1013
reactive power of phase B
magnifying
1000 times
-32768～
32767
4116
1014
reactive power of phase C
magnifying
1000 times
-32768～
32767
4117
1015
total three-phase reactive
power
magnifying
1000 times
-32768～
32767
4118
1016
Apparent
Power
apparent power of phase A
magnifying
1000 times
-32768～
32767
4119
1017
apparent power of phase B
magnifying
1000 times
-32768～
32767
4120
1018
apparent power of phase C
magnifying
1000 times
-32768～
32767
4121
1019
total three-phase apparent
power
magnifying
1000 times
-32768～
32767
4122
101A
Power
Factor
power factor of phase A
magnifying
1000 times
-1000～
1000
4123
101B
power factor of phase B
magnifying
1000 times
-1000～
1000
4124
101C
power factor of phase C
magnifying
1000 times
-1000～
1000
4125
101D
total three-phase power
factor
magnifying
1000 times
-1000～
1000
4126
101E
Frequency
Frequency
magnifying
100 times
0～65535
4127
101F
Unbalance
Factor
Voltage Unbalance Factor
magnifying
100 times
0～65535
4128
1020
Current Unbalance Factor
magnifying
100 times
0～65535

13
8194
2002
serial port baud rate
3
0:1200, 1:2400,
2:4800,
3:9600
8195
2003
serial port parity
check
0
0:(N,8,1)，
1:(o,8,1)，
2:(e,8,1)
8196
2004
voltage wiring mode
0
0：3LN，1：
2LL
8197
2005
current wiring mode
0
0：3CT，1：
2CT
8198
2006
PT
1
1∼9999
8199
2007
CT
1
1～9999
8200
2008
backlight time(NC)
10
5～20(0)
8201
2009
spare
--
0
8202
200A
spare
--
0
8203
200B
monthly energy
transferred time
1
1～31
8204
200C
energy ratio switch
0
0:closed 1：
open
8205
200D
energy decimal
places
1
1~3
The product of PT ratio and CT ratio is not more than 300,000.
8.3 Real-time Clock Zone (Function Code 0x10 Write; Function Code 03/04 Read)
Address
(DEC)
Address
(HEX)
Category
Parameter
Default
Value Range
12800
3200
Time
Year
2000
2000～2099
12801
3201
Month
1
1～12
12802
3202
Date
1
1～31
12803
3203
Hour
0
0～23
12804
3204
Minute
0
0～59
12805
3205
Second
0
0～59
12806
3206
Millisecond
0
0～999
Remark：
1.Set time with function code 0x10 (write). Read time of the meter with function code 03/04
(read). In order to prevent the occurrence of February 31st, the "Time" must be set with the
command 10H. Otherwise it will be invalid. The clock chip will automatically turn milliseconds to
zero. So milliseconds can be read-only.

14
8.4 Real-time Energy Zone (Function Code 03/04 Read)
Address
(DEC)
Address
(HEX)
Category
Parameter
Default
Value Range
16384
4000
Total Real-
time Energy
Total Active
Energy
0
0～99999999.9
16385
4001
16386
4002
Import Active
Energy
0
0～99999999.9
16387
4003
16388
4004
Export Active
Energy
0
0～99999999.9
16389
4005
16390
4006
Total Reactive
Energy
0
0～99999999.9
16391
4007
16392
4008
Import Reactive
Energy
0
0～99999999.9
16393
4009
16394
400A
Export Reactive
Energy
0
0～99999999.9
16395
400B
Remark:
1. The registers for peak-period, off-peak period and shoulder-period energies refer to those for
sharp-period energy.
2. Total real-time energy supports function code 04. Multi-tariff real-time energy doesn't support
function code 04 but function code 03.
The following parameters are not listed. If necessary, please contact Heyuan to get them.
Address
Parameter Name
DEC
HEX
4352-4560
1100-11DO
Harmonic Parameters Zone
8448-8477
2100-211D
Multi-tariff Period Setting Zone
16640-17369
4100-43D9
Multi-tariff Historical Energy Zone

15
Chapter 9 After-sales Service
Product Warranty
1. The product warranty period is one year.
2. The company is responsible for free maintenance or exchange within one-year warranty period.
3. The cost of the components and freight shall be charged for improper meter installation and/or
operation.
4. Over the warranty period, part of the maintenance cost according to actual situation will be
charged.
Service Guarantee
1. Product technical consulting and quality complaints will be replied within 12 hours.
2. Solutions for quality complaints will be provided within 24 hours.
3. Except statutory holidays and force majeure.
Chapter 10 Contact Us
Headquarter Add.: 7F No.1 Aosheng Building, 1166 Xinluo Street, High-tech Development Zone,
Jinan, P.R. China 250101
Factory Add.: 2F Innovation Factory, Feiyue Road, High-tech Development Zone, Jinan, P.R. China
250101
Tel: [phone]
E-mail: [e-mail]
Website: www.heyuanintel.com