Mitsubishi Electric EMU4-A2 User Manual

Energy Measuring Unit Extension for the system with the same voltage
Energy Measuring Unit Extension for the system with the different
voltage Model EMU4-A2 / EMU4-VA2
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/fa/download/search.do?mode=manual&kisyu=/ems
1. Features
• This unit is an optional device dedicated to Energy Measuring Unit (EcoMonitorPlus).
• Adding this unit enables measurement of multiple circuits.
• Model EMU4-VA2 enables measurement of the system with the different voltage.
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
(Note)
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.
(Note)
Over voltage category of measuring circuit in this unit is CAT III , and that of auxiliary power circuit (MA, MB) is CAT III
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 to +55°C.
• Altitude exceeds 2000m.
• 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. (Indoor use)
For the precautions for the compliance of the system incorporating this unit with the EMC Directives, refer to the User's Manual (Details).
(Note) 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.
• To use this unit, Base unit (EMU4-BM1-MB, EMU4-HM1-MB, EMU4-LG1-MB,EMU4-CNT-MB) is necessary. As for Base unit, refer to User's manual (Details) of each Base unit.
• To set this unit, dedicated small-size display unit (EMU4-D65) is necessary. For the setting method, refer to User's manual (Details) of the display unit.
3.3 Installation and Wiring Precautions
• 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
Danger 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.
• Any person who is involved in the installation and the wiring of this unit should be fully competent to do this work.
• Secure spatial distance more than 100 mm in all directions (other than back)
• 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 and electric shock. 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
Caution
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 ).
• 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 the current sensor (EMU-CT***, EMU-CT***-A, EMU2-CT5, EMU2-CT5-4W). Please not to exceed the rating of this
product for input of the current sensor. For further details, please refer to the manual for the current sensor to maintain the functionality and the accuracy of this product.
• The dedicated current sensor (EMU-CT***, EMU-CT***-A) 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.
• 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
• This unit cannot be used for deal and proof of electric energy measurement stipulated in Measurement Act.
• 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 LED
(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 case
Caution
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 to +60°C.
• Places the Relative humidity exceeds the range 30 to 85% or places with dewfall.
• Dust, corrosive gas, saline and oil smoke exist.
If you are considering using this unit for special purpose such as nuclear power
plants, aerospace, medical care or passenger vehicles please refer to our sales
representative.
(Note)
.
• 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 to 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.
• 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.
4. Name and function of each part
4.1 Name of each part
(1) EMU4-A2 (2) EMU4-VA2
Voltage input terminals (P1/P1, P2/P0, P3/P3, NC/P2)
Connect the voltage input wire for the measurement circuit.
LED LED
Indicate operating condition Indicate operating condition of
of this unit. this unit.
EMU4-A2
MODEL
(See Section 4.2 Indication (See Section 4.2 Indication
and functions of LEDs) and functions of LEDs)
Connecter (male)
Connecter (male)
Connect other unit
Connect other unit
(EMU4-BM1-MB,EMU4-HM1-
(EMU4-BM1-MB,EMU4-HM1-
MB,EMU4-LG1-MB,EMU4-VA
MB,EMU4-LG1-MB,EMU4-VA
2,EMU4-A2)
2,EMU4-A2)
Current input terminals
Current input terminals
(1K, 1L, 2K, 2L, 3K, 3L)
(1K, 1L, 2K, 2L, 3K, 3L)
Connect the secondary output
Connect the secondary output of
of the dedicated current
the dedicated current sensor
sensor connected to the
connected to the measurement
measurement circuit's current
circuit's current wire.
wire.
(Note) For the single-phase
(Note) For the single-phase
2-wire system, in the case of
2-wire system, in the case of
measuring two circuits in one
measuring two circuits in one
terminal block, connect current
terminal block, connect current
input lines of the second circuit
input lines of the second circuit
to 3K and 3L. (See Section 7.1
to 3K and 3L. (See Section 7.1
"Wiring")
"Wiring")
External output terminals
(Y2, COMY2)
External output terminals (Y1, COMY1)
Connect the pulse/ contact
External output terminals (Y1, COMY1)
Connect the pulse/ contact output wire.
output wire.
Connect the pulse/ contact output wire.
These are the output terminals for the circuit
These are the output
These are the output terminals for the circuit
connecting to SENSOR A.
terminals for the circuit
connecting to SENSOR A.
connecting to SENSOR B.
4.2 Indication and functions of LEDs
The names and operations of LEDs are as follows.
Name Color Function Status
RUN LED Red Indicate operating status of this unit. ON: Normal condition
OFF: Power off or hardware failure (Note 1)
MEA. A1 LED Red Indicate measuring status of the circuit A1. ON: In the middle of measuring
OFF: Halting measurement
MEA. B1 LED Red Indicate measuring status of the circuit B1. ON: In the middle of measuring
OFF: Halting measurement
MEA. A2 LED Red Indicate measuring status of the circuit A2. ON: In the middle of measuring
(Note 2) OFF: Halting measurement
MEA. B2 LED Red Indicate measuring status of the circuit B2. ON: In the middle of measuring
(Note 2) OFF: Halting measurement
ALM. A1 LED Red Indicate occurrence status of upper/lower ON: An error occurs (Note 1)
limit alert of the circuit A1. Blink: Upper/lower limit alert is issued
OFF: No alert
ALM. B1 LED Red Indicate occurrence status of upper/lower ON: An error occurs (Note 1)
limit alert of the circuit B1. Blink: Upper/lower limit alert is issued
OFF: No alert
ALM. A2 LED Red Indicate occurrence status of upper/lower ON: An error occurs (Note 1)
(Note 2) limit alert of the circuit A2. Blink: Upper/lower limit alert is issued
OFF: No alert
ALM. B2 LED Red Indicate occurrence status of upper/lower ON: An error occurs (Note 1)
(Note 2) limit alert of the circuit B2. Blink: Upper/lower limit alert is issued
OFF: No alert
(Note 1) For details, refer to Chapter 14 "Error codes" of "User's Manual (Details)".
(Note 2) For the single-phase 2-wire system, in the case of measuring two circuits in one terminal block, these indicate the measuring status of the circuit A2 or B2. (See
Figure 4.2)
5．Connecting to Base unit
(1) Peel off the blank label on the right side of the (2) Insert the connecter (male) of the Extension unit
Base unit. into the connecter (female) of the Base unit and
make both units stick together.
EMU4-BM1-MB
MODEL
Blank label
6. Attaching and removing the unit
6.1 Mounting on IEC rail
• Applicable IEC rail • Mounting
• Removing
(35mm)
(1) Pull IEC rail fixture downward
(2) Catch
IEC rail
(2) Pull the unit
1
More than 7.3
(1) Hold the unit and pull IEC
(4) Push the IEC rail
(3) Push in
rail fixture downward
fixture upward
(3) Back and right side (common to EMU4-A2 and EMU4-VA2)
Connecter (for optional devices)
Connect other unit
(EMU4-VA2, EMU4-A2)
MODEL EMU4-VA2
External output terminals
IEC rail fixture
(Y2, COMY2)
Connect the pulse/ contact
output wire.
These are the output
terminals for the circuit
connecting to SENSOR B.
EMU4-A2
MODEL
Circuit B1
Circuit A1
The circuit connected to
The circuit connected to
1K and 1L of SENSOR B
1K and 1L of SENSOR A
becomes circuit B1.
becomes circuit A1.
Circuit A2 Circuit B2
The circuit connected to
The circuit connected to
3K and 3L of SENSOR A 3K and 3L of SENSOR B
becomes circuit A2.
becomes circuit B2.
Figure 4.2
(3) Slide connection hooks (green-colored) on the top
(Note 1) Up to three Extension units
and bottom of the Extension unit to lock the unit.
can be connected to one Base unit.
(Note 2) This unit can be connected
to the Base units EMU4-BM1-MB,
EMU4-HM1-MB and EMU4-LG1-MB,
EMU4-A2
MODEL
EMU4-CNT-MB
Work under the electric outage
condition when connecting the
Extension units. Failure to do so
may cause electric shock, a
failure of the unit, a fire etc.
6.2 Mounting on JIS agreement type attachment
• Mounting • Removing
• JIS agreement type
attachment
(1) Push the stopper of the IEC rail
above
Hook
(2) Hitch 3 chases at
upper part of the
module to the hook
Attachment on the attachment
plate
panel
(2) Lift the lower part of
module slowly and
(3) Push the module down and fit in the
Spring fitting remove in reverse order
spring fitting in chases at the lower
of Attaching.
part of the module.
Caution
(1) Push down the
spring fitting