AccuEnergy AcuDC 240 Series User manual

AcuDC 240 Series Power and Energy Meter
User's Manual
ACUDC 240
DC POWER & ENERGY METER

II
PLEASE NOTE
This manual may not be altered or reproduced in whole or in part by any means without
the expressed written consent of ACCUENERGY.
The information contained in this document is believed to be accurate at the time of
publication, however, ACCUENERGY assumes no responsibility for any errors which may
appear here and reserves the right to make changes without notice. Please ask the local
representative for latest product specifications before ordering (contact information
please see the following page).
Windows®, Windows® Vista, Windows® 7, Windows® 8, and Windows® XP are registered
trademarks of Microsoft Corporation.
CUSTOMER SERVICE AND SUPPORT
ACCUENERGY provides technical support Monday through Friday between 8:30AM and
5:00PM (EST). However, this manual provides a trouble shooting section in the Appendix
that may provide a quicker solution than over the phone consultation.
You can contact ACCUENERGY for support at:
TF: 1-877-721-8908
INT: [phone]
E: [e-mail]
When contacting ACCUENERGY please have the following prepared:
•Meter’s part number + serial number (Both found on a sticker at the side of the
meter)Multiple CT Input Options compatible with any CT: 5A/1A, 333mV, Flexible
Rogowski Coil, 80/100/200mA
•Hardware Version + Firmware Version(Refer to the Appendix C, ordering information)
•A detailed problem description.

III
PRODUCT WARRANTY
ACCUENERGY provides a 5 year limited warranty for its products.
1. The warranty strictly covers manufacturing defects in material and workmanship in
products bought with in United States and Canada. The warranty is valid from the
date of purchase by the original purchaser and for a period of 60 months.Hardware
Version + Firmware Version(Refer to the Appendix C, ordering information)
2. Exclusions:
a) Damage or failure caused by abuse, misuse, faulty installation and operation,
improper or inadequate maintenance, and any repair or guarantee on repairs not
carried out by ACCUENERGY.
b) Damage resulting from inadequate packaging or carrier mishandling of returned
products.
c) All products purchased outside United States of American and Canada.
3. It is original purchaser’s responsibility to provide a dated proof of purchase. The
warranty is not transferable.
4. ACCUENERGY will at its sole discretion repair or exchange a product under warranty.
No credit will be issued.
5. THE WARRANTY IS VOID WHEN:
a) The product serial number has been altered or removed.
b) The product has been altered, service or manipulated by anyone other than
ACCUENERGY or without the prior written authorization of ACCUENERGY.
6. All shipping charges must be pre-paid by the sender. ACCUENERGY will, at its own
expense, ship back the warranted repaired product to the sender anywhere within
the United States and Canada. We will ship best way at our discretion.
7. To secure your warranty coverage, contact ACCUENERGY to obtain the registration
card that must be filled out and sent or faxed back to ACCUENERGY with a copy of a
dated proof of purchase. Products under warranty receive priority for repairs.

IV
ABOUT ACCUENERGY
Formed in 1998, Accuenergy is a leading producer of power and energy metering
products for the distribution, control and management of electrical energy and other
dynamic processes. Accuenergy’s vision is to make energy usage more dependable and
efficient, and to make energy management more convenient and intelligent. Accuenergy
products are easily integrated into new and existing energy management, automation
and building control systems for intelligent and user-friendly energy systems and are
backed by an industry-leading pre and post sale technical support and manufacturer’s
warranty.
With an emphasis on continuous improvement, innovation and high performance and
cost-effective solutions, Accuenergy has developed a growing global footprint with offices
in Toronto Canada (Headquarter), Los Angeles and Beijing.
WARNINGS GLOSSARY
The following symbols in this manual and on AcuDC 240 series meters are used to provide
warning of danger or risk during the installation and operation of the meters.
Electric Shock Symbol: Carries information about procedures which
must be followed to reduce the risk of electric shock and danger to
personal health.
When this symbol is seen on the meter, consult this user manual. Refer
to Chapter 2 for important safety information regarding mounting and
wiring of the AcuDC meter.
Safety Alert Symbol: Carries information about circumstances which if
not considered may result in injury or death.
Note: Please read this manual carefully before installation, operation and maintenance of
an AcuDC 240 series meter.
Installation and maintenance of the AcuDC 240 meter should only be performed
by qualified, competent professionals who have received training and should have
experience with high voltage and current devices.
ACCUENERGY shall not be responsible or liable for any damages caused by improper
meter installation and/or operation.

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TABLE OF CONTENTS
CUSTOMER SERVICE AND SUPPORT.....................................................................II
PRODUCT WARRANTY .................................................................................................III
CHAPTER 1: Introduction to the AcuDC................................................................1
1.1 Package Contents & Available Accessories..............................................1
1.2 Introduction and Compliance ......................................................................1
1.2.1 Introduction........................................................................................................................1
1.2.2 Compliance ........................................................................................................................2
1.3 Applications & Industries................................................................................2
1.4 Features & Specifications ...............................................................................3
1.4.1 Features.................................................................................................................................3
1.4.2 Specifications....................................................................................................................3
CHAPTER 2: Installation - Physical Setup............................................................7
2.1 Tools.........................................................................................................................7
2.1.1 Tools for Mounting ..........................................................................................................7
2.1.2 Tools for Wiring ................................................................................................................7
2.2 Mounting ..............................................................................................................7
2.2.1 Tools for Mounting..........................................................................................................8
2.2.2 Mounting I/O Modules Onto Meter ......................................................................9
2.3 Wiring .......................................................................................................................................12
2.3.1 Wiring Control Power....................................................................................................13
2.3.2 Current Input Wiring ....................................................................................................14
2.3.3 Voltage Input Wiring ....................................................................................................16
2.3.4 Current & Voltage Wiring at the Same Time...................................................17
2.3.5 Communications Wiring.............................................................................................20
2.4 Removing meter for servicing or maintenance ...................................21
CHAPTER 3: Installation - Configuration Parameter Set-up via display.............24
3.1 Display Panel and Keys....................................................................................24
3.2 General Parameter Setup...............................................................................25
3.2.1 Key’s Function in parameters setup .....................................................................26
3.2.2 Configure AcuDC to work with Shunt.................................................................26
3.2.3 Configure AcuDC to work with Current Hall Effect Sensor.....................27
3.2.4 Configure AcuDC to work with Current and Voltage Hall Effect Sensor
28
3.2.5 Clear Energy, Ah and DI Counter...........................................................................29

VI
3.2.6 Set Backlight Brightness............................................................................................30
3.2.7 Meter Clock Setting ......................................................................................................30
3.2.8 Password Setting............................................................................................................31
3.3 AcuDC Communication Setup .....................................................................31
3.4 I/O Parameter Setup.........................................................................................32
3.4.1 Meter Clock Setting .......................................................................................................32
3.4.2 RO parameter setting ..................................................................................................34
CHAPTER 4: Viewing Metering Parameters – VIA Display............................40
4.1 General Display on the AcuDC......................................................................40
4.2 View the Meter and Load Running Time.................................................43
4.3 View the serial number from the meter..................................................44
CHAPTER 5: Viewing Real-time Readings Via AcuView Software ...........46
5.1 Connection Setup ..............................................................................................46
5.1.1 Wiring .....................................................................................................................................46
5.1.2 Acuview Software Setup .............................................................................................46
5.2 Configuration Parameters Setup................................................................49
5.2.1 General Meter Parameter Setting..........................................................................49
5.2.2 Configure the Data Log using the meter’s onboard memory...............51
5.2.3 Configure the data log to log the readings on the computer’s memory
53
5.3 Viewing Metering Parameters......................................................................56
5.3.1 Real-Time Metering .......................................................................................................56
5.3.2 Reading Data Log on Meter’s Onboard Memory ..........................................57
5.3.3 Reading Data Log on the computer’s memory .............................................58
APPENDIX..........................................................................................................................60
A. Troubleshooting ..................................................................................................60
B. Modbus Register Map........................................................................................63
B.1 MODBUS-RTU Protocol...................................................................................................63
B.2 Communication Format................................................................................................66
B.3 AcuDC240 Communication Address Table.........................................................71
C. Ordering Information ........................................................................................83
D. Glossary of Definitions ......................................................................................84

AcuDC 240 Series
DC Power and Energy Meters
Chapter 1: Introduction to AcuDC
1.1 Package Contents + Available
Accessories
1.2 Introduction and Compliance
1.2.1 Introduction
1.2.2 Compliance
1.3 Applications & Industries
1.4 Features & Specifications
1.4.1 Features
1.4.2 Specifications

Chapter 1: Introduction to AcuDC
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CHAPTER 1: INTRODUCTION TO THE ACUDC
1.2 Introduction and Compliance
1.2.1 Introduction
Powerful Yet Cost-Effective
AcuDC 240 series monitors DC voltage, current, power and energy. It supports bi-
directional current measurement, and also displays meter running hour and load running
hour. Analog Output applies to DCS system, industrial monitoring and control. AcuDC
240 has a combination of accurate measurement, intelligent multifunction and simple
human machine interface. The cost-effective meter fulfills the requirements of monitoring
and controlling the DC circuit.
Compact and Easy to Install
The dimensions of AcuDC 240 series meet DIN 72X72 requirements. With a mounting
depth of 65mm, the meter can even fit in small drawer type cabinets. It utilizes a self-lock
installation mechanism, eliminating the necessary of fix bolts, which makes installation or
removal quick and convenient.
User Friendly Interface
AcuDC 240 series utilizes a clear high-definition LCD screen with large characters. The
LCD screen comes with a brightness adjustable backlight, which ensures easy observation
of metering data in any environment. With a large LCD screen display, the two keys on the
meter from allow users to observe multiple parameter data at the same time. The meter
parameter settings can be set either via front panel keys or the communication port. The
Parameter settings are saved in the non-volatile EEPROM, which remains when power is
off.
1.1 Package Contents & Available Accessories
When you open the package, you will find the following items:
1. AcuDC 240 Meter X1
2. Terminal Blocks X1 - X3 (Depending on model)
3. Installation Clips X4 (Already assembled to the meter)
Available Accessories:
I/O modules (Combinations of digital I/O, analog I/O and relay output)
Current transformers
USB to Serial Converters

AcuDC 240 Series
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DC Energy & Power meters
High Safety and Reliability
AcuDC 240 series meter was designed according to industrial standards. It can run
reliably under high power disturbance conditions. This meter has been fully tested for
EMC and safety compliance in accordance with multiple international standards. The
casing is highly fire resistant due to high quality, durable engineering plastics.
1.2.2 Compliance
The following table lists the compliances this meter meets:
1.3 Applications & Industries
Applications:
•DC meter & metering
Metering of DC consumption and generation of different DC electrical systems
•DC transducer
Installed transducer reads power, energy, voltage, current and amp hour data and
outputs digital pulse and/or analog signals
•DC data logger / data logging
Installed meter reads, records and stores power, energy, voltage, current and amp
hour data for subsequent download, reporting and analysis
Industries:
•Renewable energy & green systems
Generation by solar photovoltaic (PV) arrays, wind turbines, inverter & battery
monitoring, DC consumption of electric vehicle (EV) charging stations
•Transportation Systems
Consumption of rail / railway, subway and trains and transit systems and related DC
equipment
•Telecommunications
Consumption on cell / cellular towers and equipment
•Datacenters
Consumption of data centers and equipment
Safety
Quality Control
Environmental
Conforms to UL Std 61010-1
Certified to CSA Std C22/2 No. 61010-1
CE certified.
Certified to ISO 9001:2008 standard
IEC 60068-2; Nema3 Certified
IP54 Certified

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1.4 Features & Specifications
1.4.1 Features
DC power system metering;
Monitor and control power switches;
Alarming and analog output;
Standard 72x72mm, allows for drawer type panel installation;
Three line high-definition LCD display;
Accessible with SCADA, PLC systems;
Easy installation, simple wiring;
Data Logging: Offers 3 configurable historical logs where the all of the metering
parameters can be recorded. The onboard memory is up to 4 MB and each log size is
adjustable.
1.4.2 Specifications
The following tables list the specifications of AcuDC 240 meter.
Parameter Accuracy Resolution Range
Voltage 0.2% 0.001 V 0~1200 V
Current 0.2% 0.001 A 0~±50000 A
Power 0.5% 0.001 kW 0~±60000 kW
Energy 0.5% 0.01 kWh 0~9999999.99 kWh
Drift with
Temperature <100ppm / °C
Stability 0.5‰/year
Voltage
Input Range
Voltage Direct Input0~1000V; Via Hall Effect Sensor0~1200V
Input Impedance 2MΩ
Load <0.6W
Accuracy 0.2%

AcuDC 240 Series
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DC Energy & Power meters
Voltage
Current
Input Range
0~±10A(Direct Input, pick up current 0.01A)
0~±50000A(Via Shunt or Hall Effect Sensor, program-
mable range)
Shunt 50~100mV(programmable)
Hall Effect Sensor 0~±5V/0-±4V, 4~20mA/12mA±8mA
Power Consumption 2W(MAX)
Accuracy 0.2%
Digital Input
Type Dry Contact
Isolation Voltage 2500Vac
Environment
Operation Temperature -25°C ~ +70°C
Storage Temperature -40°C ~ +85°C
Humidity 5%~95%Non-condensing
Output
Relay Output (RO)
Type Mechanical contact, Form A
Max Load Voltage 250Vac/30Vdc
Max Load Current 3A
On Resistance 100mΩ (Max)
Isolation Voltage 4000Vac
Mechanical Life 5 × 106 times
Digital Output (Photo-Mos)
Load Voltage Range 0~250Vac/dc
Load Current 100mA(Max)
Max Output Frequency 25Hz, 50% duty cycle
Isolation Voltage 2500Vac
Analog Output (AO)
Load Voltage Range 4-20mA/0~20mA; 0~5V/1-5V
Load Current 0.5%
Max Output Frequency Current type, max load resistance: 750 Ohm Voltage
type, max load current: 20 mA

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Communication
Type RS485, half duplex, Optical Isolated
Protocol Modbus-RTU
Baud Rate 1200~38400bps
Isolation Voltage 2500VAC
Power Relay Supply
Input (P1)100-240Vac, 50/60Hz, 100-300Vdc
(P2) 20-60Vdc
Consumption 3W (typical value)
Installation
72 x 72 mm Panel mounted
Table 1-3 lists the functions of AcuDC240 series.
Table 1-3 AcuDC 240 Series
Function AcuDC 241 AcuDC 242 AcuDC 243
Metering
Voltage V• •
Current I• •
Power P•
Energy E•
Ampere
-Hour Ah •
I/O
2DI+2AO
Support DI
Count
○○○
2DI+2RO ○○○
2DI+2DO ○○○
2DI+ ±15Vdc ○○○
Data Logging
All metering parameters can
be recorded (Voltage, Current,
Power, Energy, Ampere-hour, DI
Count); Interval 1 minute; Can
record 4 months
○
Communication RS485, Modbus RTU ○○○
Display LCD •••
Dimensions 72×72×64.5mm (Cutout: 68x68 mm) / 2.835 x 2.835 x 2.539 inch (Cutout:
2.677 x 2.677 inch)

AcuDC 240 Series
DC Power and Energy Meters
Chapter 2: Installation - Physical Setup
2.1 Tools
2.1.1 Tools for Mounting
2.1.2 Tools for Wiring
2.2 Mounting
2.2.1 How to choose installation place
2.2.2 Mounting I/O modules onto meter
2.2.3 Mounting meter onto switchboard panel
2.3 Wiring
2.3.1 Wiring Control Power
2.3.2 Current input wiring
2.3.3 Voltage input wiring
2.3.4 Current & Voltage wiring at the same time
2.3.5 I/O Module wiring
2.3.6 Communications wiring
2.4 Removing meter for servicing or
maintenance

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Chapter 2: Installation - Physical Setup
CHAPTER 2: INSTALLATION - PHYSICAL SETUP
2.1 Tools
2.1.1 Tools for Mounting
•#2 Flathead Screwdriver
•Wire Cutters
2.1.2 Tools for Wiring
•A 1A/250Vac circuit breaker for the auxiliary power supply loopWire Cutters
•A 1A/250Vac circuit breaker should be used in the voltage input loop.
•Choice of wire of power supply is AWG22-16 or 0.6-1.5mm2
•The wire for voltage input is AWG16-12 or 1.3-2.0mm2
•The wire size of current input is AWG15-10 or 1.5-2.5mm2
The following may be required:
•If using RS485 for communication, use a good quality shielded twisted pair cable,
AWG22 (0.5mm2) or higher
•The wire of digital input should be chosen between AWG22~16 or 0.5~ 1.3mm2
•The wire of relay output should be chosen between AWG22~16 or 0.5~1.3mm2
•The wire of the digital output circuit should be chosen between AWG22~16 or 0.5~1.3
mm2
2.2 Mounting
Considerations When Installing Meters
•Installation of the meter must be performed by qualified personnel only, and should
follow standard safety precautions through the installation procedures. Those
personnel should have appropriate training and experience with high voltage devices.
Appropriate safety gloves, safety glasses and protective clothing are recommended.
•During normal operation, dangerous voltage may be present in many parts of the
meter, including terminals, and any connected I/O (Inputs and Outputs) modules and
their circuits. All primary and secondary circuits can, at times, produce lethal voltages.
AVOID contact with any current-carrying surfaces.
•The meter and its I/O output channels are NOT designed as primary protection
devices and shall NOT be used as primary circuit protection or in an energy limiting
capacity. The meter and its I/O output channels can only be used as secondary
protection. AVOID using the meter under situations where failure of the meter may
cause injury or death. AVOID using the meter for any application where risk of fire
may occur.

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AcuDC 240 Series
DC Energy & Power meters
•All meter terminals should be inaccessible after installation.
•Applying more than the maximum voltage the meter and/or its modules can
withstand will permanently damage the meter and/or its modules. Please refer to the
specifications in section 1.4.1 for all devices before applying voltages.
NOTE: If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
NOTE: There is no required preventive maintenance or inspection
necessary for safety. However, any repair or maintenance should be
performed by the factory.
DISCONNECT DEVICE: The following part is considered the equipment
disconnect device.
A switch or circuit- breaker shall be included in the installation.
The switch shall be in close proximity to the equipment and within
easy reach of the operator. The switch shall be marked as the
disconnecting device for the equipment.
2.2.1 Tools for Mounting
Note: Before installation, please check the environment, temperature and humidity to
ensure the AcuDC 240 series meter is being placed in a proper place.
1. Temperature
AcuDC 240 operation temperature is -25°C ~ 70°C, which will accommodate most user
applications. If a special temperature range is needed, please contact Accuenergy.
Please Note: It can influence the meter life negatively if the meter operates under
extremely high or extremely low temperature environments. AcuDC 240 storage
temperature is -40°C ~ 85°C.
2. Humidity
5% to 95% non-condensing
3. Location
AcuDC 240 series meter should be installed in a dry and dust free environment. Avoid
exposing meter to excessive heat, radiation and high electrical noise sources.
Alert
Alert
Alert

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Chapter 2: Installation - Physical Setup
2.2.2 Mounting I/O Modules Onto Meter
If the meter is equipped with an I/O module, you need to mount the module onto meter
before installing the meter.
Installation Method
With the link pins, I/O module is linked to the meter.
1. Insert the mounting clips to the counterpart of AcuDC 240 meter, and then press the
I/O module lightly, so linking is established, as shown in Fig 2-2.
(A)
(C)
(B)
(D)

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AcuDC 240 Series
DC Energy & Power meters
2. Tighten the installation screws.
Note: Install I/O Module carefully to avoid damage; under no circumstances should any
installation be done with the meter powered on. Failure to do so may result in injury or
death.
2.2.3 Mounting Meter Onto Switchboard Panel
Appearance and Dimensions
Fig 2-3 AcuDC 240 Appearance
Table 2-1 Part Name of AcuDC 240
Fig 2-4 AcuDC 240 Dimensions
Part Description
1. Casing High intensity fire resistant engineering plastics
2. Front Casing Visible portion after mounting onto a panel
3. Display Large LCD display
4. Key Two keys are used to select display and set
5. Voltage and Current Input Terminals Used for voltage and current input
6. Communication Terminals Communication output
7. I/O Module Optional I/O module
8. I/O Terminal Optional I/O terminals, including 2DI, 2AO/2RO
9. Power Supply Terminal Power supply terminal
10. Installation Clips Used for securing the meter to the panel

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Chapter 2: Installation - Physical Setup
Installation Steps
AcuDC 240 series meter is generally installed into the switchboard panel.
1. Cut a square hole (Standard DIN). See figure 2-5 for dimensions. Unit:mm
2. Remove the clips (10) from the meter, and insert the meter into the square hole from
the front side, as shown in following figures.
Fig 2-5 Panel Cutout
a. Panel Cutout
c. Putting back the Clips at the back
of the Panel
b. Inserting the Meter to the Panel
Square Hole
d. Installation Completed

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AcuDC 240 Series
DC Energy & Power meters
Fig 2-7 AcuDC 240 Terminal Strip
a. Voltage and Current Terminal Strip
c. I/O Terminal Strip (2DI+2AO)
e. I/O Terminal Strip (2DI+±15V)
b. Power Supply Terminal Strip
d. I/O Terminal Strip(2DI+2RO/2DO)
f. Communication Terminal Strip
2.3 Wiring
Terminal Strips
There are 3 groups of current terminal strips. There will be another terminal strip if the
meter is connected with the I/O module.
Safety Earth Connection
Before setting up the meter’s wiring, please make sure that the
switchgear has an earth ground terminal. Connect both the
meters and the switchgear’s ground terminal together.
This ground terminal symbol is used in this user’s manual.

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Chapter 2: Installation - Physical Setup
1A FUSE
Power Supply
EMC lter
AcuDC 240
11
12
13
L/+
N/-
G
L
N
G
L
N
G
2.3.1 Wiring Control Power
CAUTION: Make sure you check the power supply option you have before energizing the
meter. Check the silver sticker on the side of the meter to confirm what power supply
option you have.
The silver sticker on the side of the meter contains information such as the model
number, power supply, voltage/current inputs and serial number.
To power the meter, you need to connect the power supply terminal as shown below.
This will be connected based on the two power supply options available, that is:
1A FUSE
Power Supply
AcuDC 240
11
12
13
L/+
N/-
G
Fig 2-9 Power Supply Wiring
2-10 Power Supply Wiring with EMC Filter
Choice of wire power supply is AWG16-22 or 0.6-1.5 mm2.
1. The Standard option: 100-240Vac, 50/60Hz or 100-300Vdc
2. The Low Voltage DC option: 20-60Vdc
The independent power supply circuit loop must have a fuse or air circuit breaker. The
fuse could be 1A/250Vac, time delay type. If circuit breaker is used, a CE certified product
with compliance of IEC947 is recommended.
Terminal G (13) must be connected to the ground for the safety.
An isolated transformer or EMC filter should be used in the auxiliary power supply loop if
power quality problem exists in the power supply, as shown in following figure.