KEPID AMSTECH EMU11A User Manual
EMU
User Guide
Thank you for purchasing this product.
First of all, be sure to read this manual for correct use of the
product.
If you find any missing contents or error, please inform us.
KEPID AMSTech assumes no responsibility for any direct or indirect
loss or damage which may occur through use of this product,
regardless of any failure to perform on the part of this product.
Copyright © 2011 by KEPID AMSTech Co., Ltd. All rights reserved.
This document contains information that is the property of KEPID AMSTech Co.,
Ltd. and is furnished for the sole purpose of the operation and the maintenance
of products. No part of this publication is to be used for any other purpose, and
is not to be repurposed or translated into any human or computer language
without the prior express written consent of this company.
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Table of Contents
1. General Information..................................................................................................1
1.1 Certification related......................................................................................................... 1
1.2 Labeling..........................................................................................................................2
1.3 Glossary .........................................................................................................................2
1.4 Safety instructions..........................................................................................................3
1.5 General description ........................................................................................................ 4
1.5.1 EMU (Energy Meter Unit)....................................................................................5
1.5.2 EMG (Energy Meter Gateway)............................................................................7
1.5.3 EMR (Energy Meter Router)................................................................................9
1.5.4 Handling multiple EMUs using Zigbee................................................................... 9
2. Installing and Configuring Hardware.................................................................... 11
2.1 Before installation......................................................................................................... 11
2.2 Installing EMU ..............................................................................................................13
2.2.1 Installing the EMU body.......................................................................................13
2.2.2 LED display of EMU...........................................................................................14
2.2.3 Setting EMU ID and Baud Rate.........................................................................15
2.2.4 Mounting sensors .............................................................................................. 16
2.2.5 connecting voltage wires ..................................................................................... 17
2.3 Installing EMRs and EMG ............................................................................................19
2.4 Connecting EMG to PC................................................................................................19
2.5 Installing the monitoring program................................................................................. 20
3. Monitoring Program ...............................................................................................23
3.1 Main screen (Accumulative Energy)............................................................................. 23
3.2 Instantaneous Energy...................................................................................................25
3.3 Harmonic Voltage......................................................................................................... 26
3.4 Harmonic Current.........................................................................................................27
3.5 Status & Command.......................................................................................................28
4. Software Interfaces.................................................................................................30
4.1 EMU related.................................................................................................................. 30
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Tables of Contents
4.1.1 Parameters and functions.................................................................................. 30
4.1.2 Modbus commands ...........................................................................................31
4.1.3 Modbus register map #1....................................................................................31
4.1.4 Modbus register map #2....................................................................................35
4.1.5 Modbus register map #3: Voltage Harmonic .....................................................36
4.1.6 Modbus register map #4: Current Harmonic.....................................................38
4.1.7 Modbus register map #5: User Map..................................................................40
4.1.8 Scaling factors...................................................................................................42
4.1.9 Energy counters.................................................................................................42
4.1.10 Recording interval time (register 64).................................................................43
4.1.11 Recording interval-based energy....................................................................... 43
4.1.12 Time stamp........................................................................................................43
4.1.13 Frequency (register 27).....................................................................................43
4.1.14 Maximum current...............................................................................................44
4.1.15 Minimum voltage................................................................................................44
4.1.16 Product identification.........................................................................................44
4.1.17 Software version................................................................................................45
4.1.18 Status word........................................................................................................45
4.1.19 Command word.................................................................................................45
4.2 EMR related.................................................................................................................. 46
4.3 EMG related .................................................................................................................46
4.4 Communication protocol...............................................................................................46
4.4.1 Frame structure of multiple registers for read....................................................47
4.4.2 Frame structure of force coil and single register for write .................................47
5. Troubleshooting......................................................................................................48
6. Specifications ......................................................................................................... 49
6.1 EMU specifications....................................................................................................... 49
6.2 EMR & EMG specifications .......................................................................................... 49
6.3 Measurement information............................................................................................. 50
7. Manufacturer Information......................................................................................51
7.1 Manufacturer ................................................................................................................51
7.2 Documents and others ................................................................................................. 51
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1. General Information
1.1 Certification related
This product has been designed to comply with the following standards and directives:
IEC 62053-21 Class 1.0 (Measurement Standard)
IEC 61010-1: 2001 (Safety Specification)
FCC Part 15, Class B
FCC Part 15, Class C
FCC compliance Information
This device complies with part 15 of FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) This device must
accept any interference received, including interference that may cause undesired operation.
Information to the user
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a
residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
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1. General Information
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
Caution: Exposure to Radio Frequency Radiation.
To comply with FCC RF exposure compliance requirements, a separation distance of at
least 20 cm must be maintained between the antenna of this device and all persons.
For more details, see this manual.
1.2 Labeling
The label including the model name, identification number and etc. is placed on the
back cover. The identification number of each device is placed on the bottom center of
the back cover.
1.3 Glossary
Wi-GEM (Wireless Green Energy Meter): Product name that consists of EMU,
EMG, and EMR.
EMU (Energy Meter Unit): Energy meter that collects the required electrical
parameters.
EMG (Energy Meter Gateway): The network gateway.
EMR (Energy Meter Router): Router between EMU and EMG.
RTC (Real Time Clock)
Modbus: Communication protocol.
R/S/T/N: In case of 3-phase 4-wire, it indicates the phases of power. In case
of 3-phase 3-wire, only R, S, and T exist. Depending on the country, they are
also displayed as L1, L2, L3, and N.
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1. General Information
1.4 Safety instructions
DANGER
If you do not follow the instructions in this manual, it may cause serious accidents.
Only qualified persons from the manufacturer or agent must handle the inside
components of the product.
Owners, maintenance and service personnel, managers, operators, setters,
programmers, foremen, mechanics, and all personnel related to these
products must read and strictly follow the safety instructions in this manual.
Please read the following warnings and cautions to prevent injury or damage to the
product.
This symbol alerts that ignoring an instruction or incorrect action may cause a death or
serious injury.
This symbol alerts that ignoring an instruction or incorrect action may cause minor injury or
damage to the product.
DANGER
WARNING
CAUTION
This symbol alerts that ignoring an instruction or incorrect action may cause a product
malfunction or data or property loss.
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1. General Information
1.5 General description
Figure 1.1 Communication Concept Diagram
To reduce power consumption or carbon emission, detailed power measurement for
each process, line, and device is required.
By installing Wi-GEM, detailed power measurement is enabled. Wi-GEM also can
perform the following:
Measurement of voltage, current, active/reactive power, apparent power,
power factor, and frequency
Measurement of peak power
Simultaneous event monitoring and storing for instantaneous low-voltage and
over-current
Measurement of 21 harmonic data (voltage and current) for each phase
Because we open the Modbus protocol and register map for measurement, you can
easily build your own system.
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1. General Information
1.5.1 EMU (Energy Meter Unit)
EMU is the energy meter that collects the required
electrical parameters at the specific interval after its
sensors are fixed on the power cable. A single
EMU can also be connected to a computer for
analysis.
An EMU can have 2 sensors that measure the
electrical parameters for 3 phase 3 wire (R/S/T).
An EMU can have 3 sensors that measure the
electrical parameters for 3 phase 4 wire (R/S/T/N).
It can support wirings for single phase, 3 phases 3 wires, and 3 phases 4 wires.
Communication is possible by a single EMU or multiple EMUs.
Figure 1.2 EMU Parts
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1. General Information
Name Description
DIN Rail Fix Clip
Fixing Screw Hole
1 & 2
Product Label
Identification
Label
LED Indicator
Power Inputs
Zigbee
To fix EMU onto a DIN rail, use this clip on the back cover.
To fix EMU on a wall of the distribution panel, insert screws in
these holes and fasten them.
The product label is placed here.
The label is attached on the back cover. The ID can be set
using the DIP switches or using a program. In case of using
DIP switches, the maximum number of IDs is 63. With the
program, maximum 255 IDs can be set while all DIP switches
are off.
It displays the current status. It can display various statuses.
For 3 phase 4wire, Connect power input sources (L1 (R), L2
(S), L3 (T), and N).
For single phase, connect power input sources (L1 (R), N)
For 3 phase 3wire, connect power input sources (L1 (R), L2
(S), L3 (T))
If EMU needs to be directly connected to a PC, use the RS485
RS485 Port
(optional)
connection port. Connect P+ and N- of EMU with the USB port
on a PC via the connector. It supports Zigbee or RS485
communication.
Main features of EMU are as follows:
Measuring instantaneous values for voltage, current, active power, reactive
power, and apparent power of each phase
Measuring accumulative values for active energy and reactive energy,
apparent energy of each phase, and the total of each phase.
Measurement of frequency: 50/60Hz
Measurement of harmonic of each voltage and current up to 21
Wide operating voltage (phase voltage 57 to 277 V~, L1-N)
Measurement of wide input voltages: Max. 300V Vrms, 3~, CAT III
st
Measurement of input currents using the split core CT: 5A, 50A, 100A, 200A,
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1. General Information
300A, 400A, 500A, 600A, 800A, 1200A, 1600A, 2400A
Measurement of input currents using Rogowski coil: 1000A, 2000A, 3000A,
5000A
Power consumption: 12 VA
Isolation: Isolation class II, IEC61010-1 CAT III Vrms
Measurement category: CAT III
Environment: Indoor use
Ambient operating temperature: -10 to +55℃
Ambient storage temperature: -25 to + 85℃
Mass: 160 g
Maximum altitude: 2000 m
Pollution degree:
Degree of protection: IP2x
2.4 GHz wireless ZigBee module
Data logging into a PC
Time stamps for each transmission data
Logging interval: 1, 2, 3, 5, 6, 10, 15, 30, 60 minutes
Easy installation and DIN rail mounting
Modbus protocol
Economic price
A management program to be developed at user’s taste
1.5.2 EMG (Energy Meter Gateway)
EMG (Energy Meter Gate) is the gateway that controls the wireless network and
periodically gathers the collected data from EMUs. It can be accessed by an
application program for data analysis. The program shows the power-related values
such as voltage, current, frequency, etc. It is connected with PC via the USB cable.
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1. General Information
EMG has the following parts:
Name Function
Fixing Screw Hole
1 & 2
Antenna
USB Port
Product Label
Product Label
To fix EMG on a wall, insert screws in these holes and fasten
them.
Used for wireless communication.
Used to connect EMG with a PC. EMR does not have this port.
The product label is placed.
Antenna
Fixing Screw Hole 1
USB Port
Fixing Screw Hole 2
Figure 1.3 EMG Parts
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1. General Information
1.5.3 EMR (Energy Meter Router)
EMR is the router that relays the
data between EMU and EMG. It is
automatically detected by an EMG.
An EMG can connect EMRs up to
255 logically.
EMR has the same shape as EMG
except for USB connection port to a
PC. EMR has no connection port.
The adapter that is used to supply
power must have been evaluated by
UL. The DC power to EMR can use
the DC adapter for 5 to 9 V.
1.5.4 Handling multiple EMUs using Zigbee
If multiple EMUs need to be monitored and controlled, the collected data can be
transferred to a wireless EMR via the wireless Energy Meter routers (EMR) as shown
in Figure 1.1. Otherwise, an EMR is directly connected to an EMU.
Each individual EMU has its own unique ID that can be set using the DIP switches
inside EMU. Otherwise, users can use the factory default settings.
The network communication has been implemented following the ZigBee specification.
The communication features are:
RF wireless frequency: 2.4 GHz
IEEE 802.15.4 compliant radio
Channel access via CSMA-CA
Extensible to multiple nodes (maximum 64: EM357 code spec)
Q-QPSK modulation
Data transmission speed: up to 250 kbps
Data transmission distance: up to 100 m
Channel bandwidth: 5 MHz
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1. General Information
Available network configurations are:
Single path network topology: EMG is connected to an EMR (with an EMU)
that is connected to another EMR (with an EMU).
Star-network topology: EMG is connected to multiple EMUs.
Star Mesh network topology
Figure 1.4 An Example of Star Mesh Network Topology
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2. Installing and Configuring
Hardware
2.1 Before installation
Electrical shock or fire! This product can cause serious injury or
DANGER
CAUTION
CAUTION
death to persons if the instructions are not cautiously kept.
Follow the standard specifications and safety requirements.
Do not cut or forcibly pull the cables.
Only qualified persons must install the product.
WARNING
First of all, be sure to familiar with this manual.
Perform the following suggestions for correct installation.
If multiple EMUs are required to be installed, plan the layout of EMUs. For this
purpose, think over the network topology and fixing method.
Check whether any other interference generating devices exist or not. If so,
relocate the installation location.
Check whether the rated voltage and current on the label are correct.
Install the product to the place that is not affected by strong magnetic field for
correct operation and precision.
The temperature must be within the operation temperature range. Do not install
the product outdoors.
The upper or lower clamp must be kept clean for correct operation and
precision.
Install the product following the instructions in this manual. An arbitrary
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2. Installing and Configuring Hardware
installation may cause damage to the product or personal injury.
Do not keep four side locks and power input terminal blocked for ventilation
flow.
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2. Installing and Configuring Hardware
2.2 Installing EMU
During EMU installation, be sure to turn off the power.
DANGER
Do not apply physical damage to the product. If the clamp is
DANGER
separated or its insulation tube is stripped, it may cause injury or
death.
Only qualified persons must install EMU.
CAUTION
Be sure to install EMU in the distribution panel with an additional
CAUTION
CAUTION
2.2.1 Installing the EMU body
To keep effective wireless network communication, do not install EMU in front of
interference generating materials or metal surfaces. If the embedded antenna is close
to the material, it can decrease the efficiency of the embedded antenna.
To mount the EMU on the wall, perform the following steps:
1. Prepare two screws.
lock. Only the qualified person must access the distribution panel.
Be sure to follow the instruction in this manual during installation.
Keep the specified specifications and regulations.
2. Insert screws in the holes shown in Figure 1.2 and fasten them with a
screwdriver.
To mount the EMU onto a DIN rail, perform the
following steps:
1. Insert the EMU onto the DIN rail and move it to
a desired position.
2. Pull up the fix clip to fix the EMU.
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