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Energy Measuring Unit
Model
EMU4-BD1-MB
EMU4-HD1-MB
User's Manual (Digest)
・Before using this unit, please read both this manual and Details carefully and pay attention to safety to handle this unit correctly.
・Make sure that the end users read this manual and then keep the manual in a safe place for future reference.
ABOUT MANUALS
You can download User's manual (Details) of this unit from the following site.
http://www.mitsubishielectric.co.jp/haisei/lvs/downloads/handling.htm
1. Features
(1) This Energy Measuring Unit can measure various types of electric quantity such as voltage, current, electric power and electric energy.
(2) The measurement data can also be transmitted to superior monitoring systems through MODBUS ® RTU communication.
(3) In addition to the provision for measuring the quantity of electricity, the unit has two external input ports supporting both pulse input and contact input by way of switching (EMU4-HD1-MB).
With pulse input set, you can measure the production volume or the utility other than electricity, such as water, gas and air.
With contact input set, you can monitor status or alarm and measure the operating time of facility or the operating power.
MODBUS ® is registered trademarks of Schneider Electric SA
2. Checking package contents
This following items for this device and included in package. Check that no items are missing.
(1) Energy Measuring Unit x1
(2) User's Manual (Digest) x1
3. Safety Precautions
3.1 Precautions for Operating Environment and Conditions
This unit is premised on being used in pollution degree 2* environment. When used in higher pollution degree, protect this unit from pollution on another device side to be incorporated.
Over voltage category of measuring circuit in this unit is CAT II*, and that of auxiliary power circuit (MA, MB) is CAT II*.
Do not use this product in the places listed below. Failure to follow the instruction may cause malfunctions and a life decrease of product.
・Places the Ambient temperature exceeds the range -5 - +55°C.
・Altitude exceeds 1000m.
・Places in strong electromagnetic field or places large amounts of external noise exist.
・Places exposed to direct sunlight
・Places exposed to rain or water drop.
This unit is the open type device, which are designed to be housed within another device for prevention of electric shock. House this unit within the device such as the control panel before use.
For the precautions for the compliance of the system incorporating this unit with the EMC Directives, refer to the User's Manual (Details).
*: For the definition of the pollution degree and the over voltage category, refer to EN61010-1/2010.
3.2 Matters concerning the precaution before use
・Use the unit in the specified usage environment and conditions.
・The setting of this unit (phase system, primary voltage and primary current, sensor type) is necessary before use it. Please refer to User's Manual (Details) about each setting method.
3.3 Installation and Wiring Precautions
Any person who is involved in the installation and the wiring of this unit should be fully competent to do this work.
Danger
・Shut off the external power supply for the unit in all phases before installing or wiring. Failure to do so may cause an electric shock or damage of this unit.
・Work under the electric outage condition when installing and wiring. Failure to do so may cause electric shock, a failure of the unit, a fire etc.
・When tapping or wiring, take care not to entering any foreign objects such as chips and wire pieces into this unit.
・Check the connection diagram when wiring. Wrong wiring may cause failure of the unit, a fire or electric shock.
・For protection against noise, transmission lines and input/output lines shall not be placed close to or bound together with the power lines and high-voltage lines.
・Strip the wires with proper length. Overlong stripping length may cause short to next wire. Shorter stripping length may cause contact failure.
・Take care not to short to next terminal by a filament. (Do not plate the wires with solder.)
・Do not connect more than two wires to one terminal of a terminal block for preventing loose contact and wires dropout.
・Use appropriate size of electric wires. If inappropriate size of electric wire is used, it may cause a fire due to generated heat.
・Tighten the screw within the specified torque. Under tightening can cause drop of the screw, short circuit or malfunction. Over tightening can damage the screw and/or unit, resulting in
drop, short circuit or malfunction.
・After tightening the screws, be sure to check all the screws tightened. Loose screw may cause malfunction of the unit, a fire or electric shock.
・Be sure to attach the terminal cover to prevent electric shock.
・Use the crimp-type terminal appropriated for the size of electric wires. If inappropriate crimp-type terminal is used, a wire breakage or a contact failure may occur, which may cause a
device malfunction, a failure, a burnout or a fire.
・FG terminal must be grounded according to the D-type ground (ground resistance is not exceed 100Ω).
Caution
High-voltage protective element is mounted between MA and FG, MB and FG. When applied high voltage, for example during a commercial frequency withstand voltage test, protective
element works to short between MA and FG, MB and FG.
・Do not directly touch any conductive part of the unit. Doing so can cause electric shock, failure or malfunction of the unit.
・When using this product, make sure to use it in combination with current sensor (EMU-CT50/CT100/CT250/CT400/CT600, EMU2-CT5 and EMU2-CT5-4W).Please not to exceed the
rating of this product for input of current sensor. For further details, please refer to current sensor manual to maintain the functionality and the accuracy of this product.
・The dedicated current sensor (EMU-CT50/CT100/CT250/CT400/CT600) is used only for low voltage circuit. It cannot be used for a high voltage circuit. EMU2-CT5 and CT5-4W should
be used with the secondary side (5A) of transformer transfixed. If it is connected with a high-voltage circuit by mistake, it may cause a burnout of the device and a fire. It is critically
dangerous. For the allowable maximum voltage of current sensor, refer to User's manual (Details) 13 "Option devices" (1) Specifications.
・The dedicated current sensor has a polarity (directionality). Be careful about it when installing the unit.
・The wires to be connected to this unit shall be placed in a duct or fixed together by cramping. If the electric wires are not placed in the duct or cramped together, loosen wires or their
movement or careless stretch may cause a breakage of the unit or wire or a malfunction due to poor contact of electric wires.
・If the wires connected to this unit are strongly pulled off, it may cause a malfunction or a breakage to the unit or the wire.
・Do not exceed the specified voltage when doing an insulation resistance test and a commercial frequency withstand voltage test.
・To prevent persons with little knowledge about electric equipment from electric shock, panel must be taken either following measure.
Lock the panel so that only those who get an education about electric equipment and have sufficient knowledge can unlock, or shut off power supply automatically by opening the panel.
Cover the dangerous part of this unit.
3.4 Precautions for Use
・Use this unit within the ratings specified in this manual. If it is used outside the ratings, it may cause not only malfunction or failure but also fire burnout.
・Do not disassemble or modify this unit. It may cause failure, malfunction, injury or fire.
Caution
・Do not touch the live part such as connection terminal. It may cause electric shock, electric burn injury or burnout of the device. If any exposed conductor is found, stop the operation
immediately, and take an appropriate action such as isolation protection.
3.5 Maintenance Precautions
・Use a soft dry cloth to clean off dirt of the unit surface. Do not let a chemical cloth remain on the surface for an extended period of time nor wipe the surface with thinner or benzene.
・Check for the following items to use this unit properly for long time.
(1) Daily maintenance
(a) No damage on this unit
(b) No abnormality with LCD
(2) Periodical maintenance (Once every 6 months to 1 year)
・No looseness with installation and wire connection
Do periodical maintenance under the electric outage condition. Failure to do so may cause electric shock, failure of the unit or a fire. Tighten the terminal regularly to prevent a fire. In
Caution
case a display unit is attached to a sensor unit, get off the display unit during maintaining or tightening terminals.
3.6 Storage Precautions
To store this unit, turn off the power and remove wires, and put it in a plastic bag.
For long-time storage, avoid the following places. Failure to follow the instruction may cause a failure and reduced life of the unit.
・Places the Ambient temperature exceeds the range -10 - +60°C.
・Places the Relative humidity exceeds the range 30-85% or places with dewfall.
・Dust, corrosive gas, saline and oil smoke exist.
・Places the average daily temperature exceeds 35°C.
3.7 Disposal Precautions
When disposing of this unit, treat it as industrial waste.
3.8 About packaging materials and this manual
For reduction of environment load, packaging materials are produced with cardboard, and this manual is printed on recycled paper.
If you are considering using this unit for special purpose such as nuclear power plants,
aerospace, medical care or passenger vehiclesplease refer to our sales representative.
･Places the average daily temperature exceeds 35°C.
・Dust, corrosive gas, saline and oil smoke exist.
・Vibration and impact exceed the specifications.
・Places metal fragments or conductive substance are flying.
・Places the Relative humidity exceeds the range 30-85% or places with dewfall.
(c) No abnormal noise, smell or heat
・Vibration and impact exceed the specifications.
・Places exposed to rain, water drop or direct sunlight.
・Places metal fragments or conductive substance are flying.
4. Name and function of each part
4.1 Name of each part
(1) EMU4-BD1-MB
(2) EMU4-HD1-MB
Frame GND terminal
Voltage input terminals
Voltage input terminals
Power supply terminals
LCD
display
Operation
button
Current input terminals
Current input terminals
Communication terminals
(MODBUS ® RTU)
Communication terminals (MODBUS ® RTU)
4.2 Functions of operation buttons
Control buttons have many functions as below.
Meaning of symbol: ○ (Press), □ (Press more than 1 sec), ◎ (Press more than 2 sec), - (Press both at the same time)
Name of Button
Operation
DISP button
Mode
SET
-/RESET
+/PHASE
DISP
Change measurement items
○
+/PHASE button
Change phase
○
○
Change harmonic order (at harmonic display)
-/RESET button
Clear alarm (at alarm generation display with alarm keeping)
◎
Operation
Transition to confirmation mode
◎
SET button
Mode
◎
◎
Transition to setting mode
Contact display
◎
Clear contact latch
Integrated value
Transition to preset display
◎
◎
display
◎
◎
Transition to reset display of all data
Enter setting menu
○
Menu display
○
○
Moving up or down of menu number
(Move at fast speed when pressing more than 1sec)
(□)
(□)
Change of setting items (forward)
○
Transition to setting menu number (at final setting item)
Moving up or down of setting value
○
○
Setting mode /
(Move at fast speed when pressing more than 1sec)
(□)
(□)
Setting display
Change setting items (backward)
○
Transition to setting menu number (at beginning setting item)
Setting mode /
□
Back to setting menu
Confirmation
Change setting items (forward)
○
mode
Confirmation
Transition to setting menu number (at final setting item)
mode / Setting
Change setting items (backward)
○
display
Transition to setting menu number (at beginning setting item)
□
Transition to setting menu
At "END" display, memorize changed setting and transition to operation
mode
Confirmation
○
At "CANCEL" display, throw away changed setting and transition to
display of setting
operation mode
reflection
Moving up or down of setting value
○
○
Reset setting values to factory default (only effective at CANCEL display)
◎
◎
5. Procedures for setting
Operation mode
Setting menu 1
Setting menu 2
Measurement display
End of setting menu
Basic setting
Communication setting
*1
"End" display
Phase wire
MODBUS
Fix change of
system
address
setting value
Primary voltage
MODBUS
(with or without
"CANCEL" display
baud rate
VT)
Cancel change
of setting value
Primary voltage
MODBUS
(with VT or direct
parity
connection)
"-" + "DISP"
Transition automatically
Factroy default
Sensor type
MODBUS
stop bit
Primary
current
Example of display on
Example of display on
setting mode
confirmation mode
Current
demand time
limit
Power demand
time limit
*2
*3
For the case of special voltage (SP)
For the case of
(Not available for 1P3W)
special current (SP)
Primary voltage
Sensor type
(VT voltage)
Primary special
Primary special
voltage
voltage
Secondary
special voltage
<Note>
For details of setting menu 1, 2, 3, 4, 5 and 6, refer to User's manual (Details).
Names of signals of terminal block (EMU4-BD1-MB)
(3) Back view
Terminal
Description
Frame GND terminal
symbol
P1、P2、P3
Connect the voltage input wire for the
Power supply terminals
measurement circuit.
Connect to ground (D type ground).
MA、MB
Connect the auxiliary power supply.
Connect the secondary output of the dedicated
1k、1L、3k、3L
LCD
current sensor connected to the measurement
display
circuit's current wire.
485+、485-
Connect the communication wire (MODBUS ®
RTU).
SLD
Connect to ground (D type ground).
Connect the "485- " terminal (the unit at end of
Ter
the link).
Operation
button
Names of signals of terminal block (EMU4-HD1-MB)
Terminal
Description
symbol
Connect the voltage input wire for the
IEC rail
P1/P1、P2/P0、
fixture
measurement circuit.
P3/P3、NC/P2
Connect to ground (D type ground).
MA、MB
Connect the auxiliary power supply.
1k、 1L、 2k、 2L、
Connect the secondary output of the dedicated
3k、3L
current sensor connected to the measurement
circuit's current wire.
485+、485-
Connect the communication wire (MODBUS ®
Contact/ pulse output terminals
RTU).
Connect to ground (D type ground).
Contact/ pulse input terminals
SLD
Ter
Connect the "485- " terminal (the unit at end of
the link).
X1、COM
Connect the contact/ pulse input wire.
X
Connect the contact/ pulse output wire.
Y1、COM
Y
4.3 Functions of LCD
Event
2
3
4
5
No.
Indicator
1
Measured value
Display measured value digitally.
2
Measured item
Display measured item displayed on indicator No.1.
3
Communication
Light when connecting communication unit.
4
Energy
Light when measuring electric energy (consumption).
Measurement
5
Setting
Indicator
Indicator
Setting mode or confirmation mode
Setting menu 3
Setting menu 4
Setting menu 5
Setting menu 6
Input/output setting
Alarm setting
Logging setting
Test mode
*9
*4
*4
*8
Contact/pulse
Upper and lower
®
Logging module
limit alarm
Test mode
input
ID setting
on or off
on or off
*5
®
Clear logging
Reset method
Upper and lower
limit alarm item
data
of contact input
®
Contact/pulse
Upper and lower
output
limit alarm value
on or off
*6
®
Unit of pulse
Alarm delay time
output
Alarm reset
Display CO2 or
method
not
*1: On confirmation mode, transition to operation mode.
*2: Transition only when selecting "SP" for "Primary current (VT)".
(For 3P4W, only special voltage is available when using VT.)
*7
*3: Transition only when selecting "SP" for "Primary current (5A)".
*4: Setting available for EMU4-HD1-MB only.
CO2 conversion
setting
*5: Transition only when selecting "CO.P." for "Contact/pulse input on or off".
*6: Transition only when selecting "PLS" for "Contact/pulse output on or off".
*7: Transition only when selecting "on" for "Display CO2 or not".
*8: Transition only when connecting logging module.
*9: Not displayed on setting mode.
Display harmonic
current or not
Symbol
Behavior
Transition from operation mode to setting mode.
Display harmonic
voltage or not
Transition from operation mode to confirmation mode.
Select menu number or "End".
Enter each setting display or transition to next item.
Display operating
Back to previous settting display.
time or not
No display
Select setting value.
Transition to "End" display.
*4
Memorize changed setting and transition to operation
mode.
Count method of
Select "CANCEL".
operating time
Cancel change of setting value.
Skip other items during setting.
Reset setting values to factory default.
1
Description
lights on setting mode.
lights on confirmation mode.
Operation of control button
Press both at the
"SET" + "-"
same time for 2 sec
"SET"
Press for 2 sec
"+" or "-"
Press several times
"SET"
Press once
"DISP"
Press once
"+" or "-"
Press several times
"SET"
Press once
"SET"
Press once
"+" or "-"
Press once
"SET"
Press once
"SET"
Press for 1 sec
"SET"
Press once
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Summary of Contents for Mitsubishi Electric EMU4-HD1-MB
- Page 1 (2) The measurement data can also be transmitted to superior monitoring systems through MODBUS ® RTU communication. symbol (3) In addition to the provision for measuring the quantity of electricity, the unit has two external input ports supporting both pulse input and contact input by way of switching (EMU4-HD1-MB). Connect the voltage input wire for the IEC rail P1/P1、P2/P0、...
- Page 2 (5A) of transformer transfixed. If they are used for the circuit directly, they should be used under 200V. (Maximum voltage: 260V) ・Maximum voltage of the circuit connected to this unit directly is 260V for EMU4-BD1-MB, or 277 / 480V for EMU4-HD1-MB. For the circuit over this voltage, use the transformer.