Energy Measuring Unit Control Unit
Model EMU4-CNT-MB
User’s Manual (Digest)
•Before using this unit, read both this manual and the detailed version carefully to handle the unit correctly.
•Be sure to forward the manual tothe end user and keep it ready to hand and accessible for future use at all times.
You can download the User’s Manual (Details) of the unit (IB63E89) from the following site.
ABOUT MANUALS
http://www.mitsubishielectric.com/fa/worldwide/index.html
1. Features
•This unit is a device to control equipment load by contact output and analog output.
•Control status information can be transmitted to superior monitoring systems through MODBUS RTU communication.
MODBUS is a trademark of Schneider Electric USA Inc.
*If it is necessary to do via other communication standards, prepare the option unit.
•Energy saving control can be easily realized by combining a measuring function and control function.
*This unit does not have the measuring function. To combine with the measuring function, connect the extension unit.
•Writing settings in this unit from Knowledge Engineering Tool (Model: EMU4-KNET) enables the control.
The Knowledge Engineering Tool can be downloaded for free from the Mitsubishi FA Global site.
•This unit has version up function because the unit function is further to be added or improved.
The unit can be updated to the latest version by using Knowledge Engineering Tool(Model: EMU4-KNET).
2. Checking package contents
The following items are included in the package of this product. When unpacking your package, check all the contents.
(1) Energy Measuring Unit x1 (2) User’s Manual (Digest) x 1 (3) Lithium battery (Model:EMU4-BT) x 1 *Stored in the battery cover
3. Safety Precautions
3.1 Precautions for Operating Environment and Conditions
When using this unit for equipment that may affect property due to the unit failure, be sure to allow extra characteristics and performance figures, and incorporate safety
measures such as double circuit.
The unit is intended for use in pollution degree 2 *Note1 environment. When using in higher pollution degree, protect the unit from pollution with another device to be
incorporated.
The overvoltage category of auxiliary power circuit (MA, MB) of the unit is CAT III *Note1.
Do not use the product in the places listed below. Failure to follow the instruction may cause a malfunction or life reduction of the product.
•The Ambient temperature exceeds the range -5 to +55°C. •The average daily temperature exceeds +35°C.
•Altitude exceeds 2000 m. •Exposed to much dust, corrosive gas, salty environment, or oil smoke
•Exposed to strong magnetic fields or large exogenous noise •Exposed to excessive vibration or impact
•Exposed to direct sunlight•Metal fragments or conductive substances are scattered.
•Exposed to rain or water drop.•The Relative humidity exceeds the range 30 to 85% RH, or Condensing
The unit is an open type device, which is designed to be housed within another system for prevention of electric shock. Be sure to install it in the system such as control panel.
For the precautions to conform the system constructed with the unit to the EMC Directives, refer to the User’s Manual (Details).
*Note1: For the definitions of the pollutiondegree andthe overvoltage category, refer to EN-61010-1/2010.
3.2 Precautions for preparation before use
•Observe the use environment and conditions for installation place.
•This unit has a built-in lithium battery. It is not connectedto theproduct when shippedfrom the factory. Connect the battery before use.
•To set up the unit, Knowledge EngineeringTool (Model: EMU4-KNET) is necessary. For thesettingmethod, refer to the User’s Manual (Details).
3.3 Installation and Wiring Precautions
Danger
•Shut off the external power supply for this unit in all phases before installing or wiring. Failure to do so may cause an electric shock or damage
to the unit.
•Work under the electric outage condition when installing and wiring. Failure to do so may cause an electric shock, a failure of the unit, or a fire.
Caution
•A qualified electrician must install and wire the unit for safety.
•Secure a space of 100 mm or more around the unit in all directions (except the back side).
•When tapping or wiring, take care not to enter any foreign objects such as chips and wire pieces into the unit.
•Check the connection diagram when wiring. Wrong wiring may cause a failure of the unit, a fire, or an electric shock.
•For protection against noise,
•Strip the wires by appropriate length. If the stripping length is too long, this may cause an electric shock or short-circuit with the next wire. Contrariwise, if it is too short, this may cause
contact failure due to bad fitting of wires.
transmission lines and output signal lines shall not be placed close to or bound together with the power lines or high-voltage lines.
•Take care not to short-circuit the next terminal by a filament. (Do not plate the wires with solder.)
•Do not connect three wires or more to one terminal of the terminal block. Otherwise, the connection gets loose and the wires may come off.
•Use appropriate size wires.If an inappropriate size wire is used, this may cause a fire due to generated heat.
•Tighten the screws with a specified torque. Insufficient tightening can cause a drop, short-circuit, or malfunction of the unit. Over-tightening can damage the screws and/or unit,
resulting in the drop, short-circuit, or malfunction.
•After tightening the screws, be sure to check all the screws tightened. Forgetting to tighten the screws may cause a malfunction of the unit, a fire, or an electric shock.
•Be sure to attachthe terminal cover to prevent an electric shock.
•Use crimp-type terminals appropriate for the size of electric wires. If an inappropriate crimp-type terminal is used, a malfunction, failure, or burnout of the unit, or a fire may occur
caused by a wire breakage or a contact failure.
•
•
The FG terminal must be grounded with D-type grounding. (The ground resistance is 100Ω or less.)
The FG terminal should be independent grounding. It may cause the malfunction by the noise from equipment that becomes a noise source such as an inverter.
•Do not directly touch any conductive parts or electrical circuits of the unit. Failure tofollow the instruction can cause an electric shock or a failure/malfunction of the unit.
•The wires to be connected tothe unit must be placed in a duct or fixed with clamps. Failure to follow the instruction may result in damage to the unit or wires dueto cable dangling or
movement, or unnecessary careless tension, or cause a malfunction due to poor connection.
•When you remove the wires from the unit, do not pull them with a strong force. If you pull them connected tothe unit, this may cause a malfunction or damage tothe unit or wires.
•Do not exceed the specified voltage when performing an insulation resistancetest or a commercial frequency withstand voltage test.
•To protect persons with little knowledge about electric equipment from electric shock, you must take either of the following measures against the panel.
Lock the panel so that only those who have gotten an education about electric equipment and have the sufficient knowledge can unlock it, or construct a structure that shuts off power
supply automatically by opening the panel.
Cover the dangerous voltage part of the unit with a cover.
3.4 Precautions for Use
•This unit cannot be used for deal and proof of electric energy measurement stipulated in Measurement Act
Caution
.
•Use the unit within the ratings specified in this manual. If it is used outside the ratings, this may cause not only a malfunction or failure but also ignition or burnout.
•Do not disassemble or modify the unit. Failure tofollow the instruction may cause a failure, a malfunction, injury, or a fire.
•For protection against electric shock, use an insulation precision screwdriver when pressing the reset button at the front of the unit.
•Do nottouch live parts such as connection terminals. Failure tofollow the instruction may cause an electric shock, electric burn injury, or burnout of the unit. If any exposed conductor
is found, stop the operation immediately and take an appropriate action such as isolation protection.
•Check that the communication connectivity is secured between a PC that operates Knowledge Engineering Tool (Model: EMU4-KNET) and this control unit.
•The unit has a built-in clock. Before use, set to the current date using Knowledge Engineering Tool (Model: EMU4-KNET).
•When you turn off the power supply whilethe BAT LED is on, present time data is deleted. If the BAT LED lights up, change the battery.
3.5 Maintenance Precautions
•Use a soft dry cloth to clean off dirt of the unit surface. Do not leave a chemical cloth on the surface for a long time or wipe the surface with thinner or benzene.
•Conduct the following inspections to properly use the unit for a long time.
(1) Daily maintenance
(a) No damage on the unit (b) No abnormality with LED display (c) No abnormal noise, smell or heat
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.
3.6 Storage Precautions
To store this unit, turn off the power, remove the wires, and put them in a plastic bag.
If you turn off the power for a long time, remove the battery from the unit.
(The cumulative power interruption backup time is 1 year. If you used the battery over the backup time, presenttime data might be deleted.)
For long-time storage, avoid the following places. Failure tofollow the instruction may cause a failure or reduction life of the unit.
•The Ambient temperature exceeds the range -10 to +60°C. •Exposed to excessive vibration or impact
•The Relative humidity exceedsthe range 30 to 85% RH, or Condensing •Exposed to rain, water drop, or direct sunlight.
•Exposed to much dust, corrosive gas, salty environment, or oil smoke •Metal fragments or conductive substances are scattered.
•The average daily temperature exceeds 35°C.
3.7 Disposal Precautions
•When disposing of this unit, treat it as industrial waste.
•The Lithium battery is disposed of according to the local regulation.
•In EU member status, there is a separate collection system for waste batteries. Dispose of the batteries property at the local community waste collection/recycling center.
The symbol shown upper right is printed on the packaging of the unit.
[Note] This symbol is for EU member states only. The symbol is specified in the new EU Battery Directive (2006/66/EC) Article 20 "Information for end-users" and Annex II.
The symbol indicates that batteries need to be disposed of separately from other wastes.
Caution There may be remaining electrical capacity in the lithium battery removed from the unit. Treat it separately because, when it contacts other metals, heat generation, rupture, or ignition
may occur.
3.8 About packaging materials and this manual
For reduction of environment load, packaging materials are produced with cardboard, andthis manual is printed on recycled papers.
4. Name and function of each part
4.1 Name of each part
(1) EMU4-CNT-MB (2) Bottom view, Back view, Side view
4.2 Indication and functions of LEDs
The names and operations of LEDs are as follows.
*Note 1: For details, refer to the User’s Manual (Details).
*Note 2: When you turn off the power supply during battery voltage drop, present time data is deleted. If the BAT LED lights up, replace the battery.
5．Optional products connectable to this unit
Optional products connectable to this unit are as follows.
Product Model Connection terminal
Extension Unit Energy Measuring Unit: Extension for the system with the same voltage EMU4-A2 The connector on the right side of the unit
Energy Measuring Unit: Extension for the system with different voltage EMU4-VA2 The connector on the right side of the unit
Energy Measuring Unit: Pulse Input Unit EMU4-PX4 The connector on the right side of the unit
Energy Measuring Unit: Analog Input Unit EMU4-AX4 The connector on the right side of the unit
Option Unit B/NET Communication Unit for Energy Measuring Unit EMU4-CM-B The connector on the left side of the unit
CC-Link Communication Unit for Energy Measuring Unit EMU4-CM-C The connector on the left side of the unit
CC-Link IE Field Basic Communication Unit for Energy Measuring Unit EMU4-CM-CIFB The connector on the left side of the unit
Logging Unit for Energy Measuring Unit EMU4-LM The connector on the left side of the unit
Accessories Small-size Display Unit for Energy Measuring Unit EMU4-D65 The connector on the front of the unit
* EMU4-A2 cannot be directly connected to the unit. For the use of it, connect EMU4-VA2 between it and the unit.
* For the details of each product andthe way to connect, refer to the manual of the product.
STOP/RUN switch
Switch the control
operation status of the
unit.
RUN：Undercontrol
STOP：Control stop
RESET button
Reset this unit.
MODBUS RTU communication terminals
(485+, 485-, SLD, Ter)
485+, 485-: Connect MODBUS communication wires.
SLD: Ground with Class D grounding
Ter: Connect with the “485-” terminal only when the
unit is installed at the very end of the link.
Auxiliary power supply
terminals (MA, MB)
Power supply to run this
product
Connector (for small-size
display unit)
Connect the small-size
display unit.
Battery cover
The lithium battery is
stored for present time
data backup.
Before use, connect the
battery connector
because it is shipped with
unconnected.
*See Section 7.1
“Connect the battery”.
Bottom view
Connector (for
extension unit)
Connect the
extension unit:
∙EMU4-VA2
∙EMU4-A2
∙EMU4-PX4
∙EMU4-AX4
IEC rail fixture Connector (for option
unit)
Connect the option
unit:
∙EMU4-CM-B
∙EMU4-CM-C
∙EMU4-CM-CIFB
∙EMU4-LM
Connector (for software
communication)
It is for
communication with
Knowledge
Engineering Tool
(EMU4-KNET).
Back view Right side view Left side view
Protective conductor terminal ( )
Ground with D-type grounding
(Grounding Resistance is lower
than 100 Ω
(2) Periodical maintenance (Every 6 months to once a year)
•No looseness of installation and terminal connection
•Replace the lithium battery every 3 years or when the battery voltage is dropped (BAT LED lights up).
Caution
•Do periodical maintenance under the electric outage condition. Failure to follow the instruction may cause an electric shock, failure of the unit, or a fire. Tighten the terminals regularly
to prevent a fire. In the case that a display unit is attached to a sensor unit, get off the display unit during maintaining or tightening the terminals.
•When you turn off the power supply while the BAT LED is on, present time data is deleted. If the BAT LED lights up, replace the battery. For the replacement method, refer to the
User’s Manual (Details).
For personal and product safety, be sure to read and observe the precautions in this section.
Caution
The caution icon ( ) on the main unit indicates that incorrect handling may cause hazardous conditions. Always follow the subsequent
instructions ( Caution) Because they are important to personal safety. Otherwise, there is danger of an electric shock, a fire, an erroneous
operation, or damage to the instrument. If the Instruments is not handled in a manner specified by the manufacturer, it might impair the
protection
provided by the product.
Name Color Function Status
RUN LED Red Indicate the operating status of this unit. ON: Normal condition
OFF: Power off or hardware failure *Note 1
MASTER LED Red Indicate the operating status of master/slave station of MODBUS RTU
communication
ON: This unit is set to master station
OFF: This unit is set to slave station
CNT. LED Red Indicate the control execution status. ON: Under control (STOP/RUN switch state is RUN)
OFF: Control stop (STOP/RUN switch state is STOP)
ERR. LED Red Indicate the error status. ON: Error occurrence *Note 1
OFF: No error
LAN LED Red Indicate the LAN communication status. ON: In communication
OFF：Not communicating
BAT. LED Red Indicate the remaining battery level. ON: Battery voltage low condition *Note 2
OFF: Battery voltage normal condition
Y1 LED Red Indicate the ON/OFF status of Contact output Y1. ON: Contact status is ON
OFF: Contact status is OFF
Y2 LED Red Indicate the ON/OFF status of Contact output Y2. ON: Contact status is ON
OFF: Contact status is OFF
Y3 LED Red Indicate the ON/OFF status of Contact output Y3. ON: Contact status is ON
OFF: Contact status is OFF
AY(A) LED Red Indicate the output status of Analog output (Current output: 4to 20 mA).
*When the setting of analog output type is voltage (0 to 5 V), LED status is OFF.
ON: Under analog signal output
OFF: Analog signal output stop
AY(V) LED Red Indicate the output status of Analog output (Voltage output: 0 to 5 V).
*When the setting of analog output type is current (4 to 20 mA), LED status is OFF.
ON: Under analog signal output
OFF: Analog signal output stop
Used only for the
external output.
RUN
SLD
RESET
AY
STOP/RUN
AY
LAN
EMU4-CNT-MB
AY
COM
Ter
Model
(V)
ERR.
(A)
Y2
Y1
Y1
(A)
LAN
COM
MASTER
Y3
Y3
COM
MA
MB
AY
Y2
COM
BAT.
COM
485-
AY(V)
CNT.
AY(A)
(V)
Y3
Y1
Y2
DISPLAY
485+
