Omron KM1 User manual

Model KM1
Smart Power Monitor
User's Manual
Catalog No. N171-E1-01

INTRODUCTION
Thank you for purchasing the Model KM1.
The Model KM1 is a board built-in type Smart Power Monitor. The Model KM1 is divided into the
following units. The operation is performed by using the master unit independently or connecting slave
units. The system can be expanded according to the number of power measurement points. A
combination with the Model KE1-CTD8E can make measurements at 36 points maximum.
>> Master unit
Model KM1-PMU1A-FLK : Can make power measurements.
Model KM1-PMU2A-FLK : Can make power measurements of two systems.
>> Slave unit
Model KM1-EMU8A-FLK : Can enter pulse/temperature and classify energies.
These units providing various functions can be operated independently or combined to use as many
functions as required.
Model KE1 is divided into the following units.
>> Master unit
Model KE1-PGR1C-FLK : Can perform power measurements and earth leakage detection.
Model KE1-PVS1C-FLK : Can perform power measurements and instantaneous voltage
drop detection.
>> Slave unit
Model KE1-VSU1B-FLK : Can perform instantaneous voltage drop detection.
Model KE1-VAU1B-FLK : Can monitor voltage and current.
Model KE1-CTD8E : Can expand CT (current transformer) and perform multi-circuit
measurements.
Model KE1-ZCT8E : Can expand ZCT (zero-phase-sequence current transformer) to
monitor multi-circuit earth leakage.
Model KE1-DRT-FLK : Can carry out DeviceNet communication.
For Model KE1, refer to "User’s Manual for Model KE1" (SGTE-717).
For Model KE1-DRT-FLK, refer to "User’s Manual for Model KE1 DeviceNet Communication" (SGTE-718).
This User’s Manual describes information on the functions, performances, and usage necessary for using
this product.
When using this product, be sure to observe the following points.
xOnly the experts having practical knowledge of electricity shall be allowed to handle this product.
xGo through and fully understand this User’s Manual, and use the product correctly.
xKeep this User’s Manual at hand for quick reference.
In addition to this manual, refer to the "Model KM1/KE1 Communication Manual" (SGTE-719) on the web
site for the explanation of communication functions.
I

Items on which you Agree by Using this
Product
1. Warranty details
[1] Warranty period
The warranty period for this product is one year from purchase or delivery to a
specified site.
[2] Warranty scope
If faults attributable to Omron arise with this product within the above warranty period,
a replacement product will be provided or repair services will be provided for free at
the site where the user purchased the product.
However, if any of the following are the cause of the fault, the product will be
out-of-scope for the warranty.
a) If the product is used in a condition, environment, or handling other than that
stated in the catalog or Instruction Manual.
b) If the fault was due to other products
c) If the fault was due to modifications or repairs other than those by Omron
d) If the product was used in different ways from those for which the product was
originally intended
e) If the fault could not be expected based on the level of science and technology
as of the time delivery from Omron.
f) If the fault is due to reasons not attributable to Omron, such as natural disasters
Also, the warranty stated in this manual refers to the warranty for a single unit of this
product, and damage caused by faults with this product is out-of-scope for the
warranty.
2. Liability limitation
[1] Omron shall not bear any responsibility for special damage, indirect damage, or
consequential damage arising due to this product.
[2] Omron shall not bear any responsibility for results arising from programs run by
parties other than Omron for this product, which can be programmed.
3. Conditions for compatibility purposes
[1] If this product is used with other products, you need to check standards and
regulations or restrictions that need to be complied with. Also, you need to check the
compatibility of systems, machines and devices to be used with this product. If you do
not perform the above, Omron shall not bear any responsibility for the compatibility of
this product.
[2] If this product is used for the following use applications, you shall use the
specifications, etc., for the confirmation after consultation with an Omron sales
representative. In addition, you shall use this product within the rated values and
performance and take safety measures, e.g., use of a safety circuit, to minimize risks
even if a failure occurs.
a) Outdoor use and use which may have a potential chemical contamination or
electric impedance, or use in conditions or environments other than those stated
in the catalog or User’s Manual
b) Use for equipment such as nuclear control, incineration facilities, train/ aviation
system, vehicle facilities, medical machines, entertainment machines, safety
devices, or for facilities covered by regulations of administrative bodies or
individual industries.
c) Systems, machines, and devices which may cause harm to human lives and
assets
d) Facilities which require a high l reliability such as gas, water, and electricity
supply systems, and 24-hour continuous operation system.
II

e) Other purposes requiring a high level of safety as per the above a) – d)
[3] If the product is used for purposes which may cause harm to human lives or assets,
you must notify concerned parties of such risks related to overall systems, and you
must check beforehand that a redundant design is created to ensure required safety,
and that wiring and installation have been appropriately completed for the overall
intended purposes for this product.
[4] Application examples stated in catalogues are for reference purposes. When you use
product, you must check the performance and safety of related machines and
devices.
[5] You must fully understand prohibited items and precautions for use, so that there will
be no unexpected damage to you or to third parties due to incorrect use of this
product.
4. Specification Change
The specifications of this product and accessories may be changed if necessary for reasons
such as improvements. Please contact an Omron sales representative to check the current
specifications of this product.
5. Applicable scope
The details given above are based on the assumption that the product will be traded and
used within Japan
If trading and using disparate outside Japan, please contact an Omron sales representative.
About this manual
(1) No part of this publication may be copied or reproduced in any form without the prio
r
written permission of OMRON.
(2) The contents of this manual, e.g., specifications, may be revised for improvement
without prior notice.
(3) OMRON takes all possible measures to ensure the contents of this manual.
However, if you find any part unclear or incorrect, contact our branch office or sales
office listed at the end of this manual. In doing so, please also state the catalog
number given at the end of the manual.
III

Safety Precautions
zSymbols for Safe Use and Their Meanings
This manual employs the following indications or symbols for points to note for the user to
use Model KM1 safely.
The points to note shown here indicate important details related to safety. You must adhere
to them.
The following indications and symbols can be shown.
Meaning of Warning
Caution Handling this product incorrectly is dangerous. This may
lead to mild to moderate severity ended injuries, or this may
lead to damage to objects
zExplanation of Symbols
Symbol Meaning
zProhibition of assembly
Notice of prohibition indicated when disassembly of equipment may
cause an electric shock or injuries.
zGeneral mandatory notice
Indication for instructing behaviors of unspecified general users not
specified.
zCaution, electricity
Notice for giving attention about the possibility of electric shock under
a specific condition.
zCaution, explosion risk
Wrong use may cause an explosion.
IV

zDisplay of warning
Caution
Ignition may occur and this may cause damage to objects.
Make sure you tighten terminal screws with standard tightening torque.
Recommended tightening torque of terminal screw: 0.69 to 0.88 Nxm
After the screw is tightened, ensure that it is not tilted.
Explosion may cause a medium or minor degree of injuries or physical loss or
damage. Do not use the product at a place where it is exposed to flammable or
explosive gas.
Breakage or explosion may occur.
When using the product, put the supply voltage and load in the specified or rated
range.
Breakage or explosion may occur.
The portion between the voltage input circuit and the CT secondary side circuit is
not insulated. If the dedicated CT is grounded, the portion between the voltage
input circuit and the CT secondary circuit is short-circuited due to wrong wiring.
Do not ground the dedicated CT to prevent failures.
This product, which uses a dedicated CT, can make normal measurements with
the CT not grounded.
Electric shocks may occur.
When the CT is connected, disconnect voltage inputs connected to the power
supply and system of the main body.
Electric shocks may occur.
When power is distributed, do not touch the terminals.
Electric shocks may occur.
For the primary side electric wire where the CT is clamped, be sure to use a
covered electric wire, which has been at least basically insulated.
When clamping is done for a conductive object, such as bus bar, ensure the basic
insulation, at least, by covering it with insulating material, etc.
Electric shocks, minor degree of injuries, ignition, or equipment failures may
occur.
Do not perform assembling, repairing, or remodeling.
V

Safety Points
To prevent operation failure or malfunction of the product, and prevent affecting performances
and function, observe the following.
1) Prevent the operation and storage (including transportation) of the product under the
following environment.
xIn a place with large vibrations or which is greatly influenced by shocks
xIn an unstable place
xIn a place at a temperature or humidity outside the specification range
xPlaces with large changes in temperature and humidity, or where there is a
possibility of condensation or freezing
xPlace where the product is exposed to direct sunlight.
xOutdoors or in a place directly exposed to wind and rain
xIn a place affected by static electricity or noise
xIn a place where the product is exposed to oil or salt water.
xIn a place where corrosive gas (sulfurizing gas, ammonia gas, etc.) exists
xIn a place with a lot of dust or iron powder
xIn a place that is affected by electrical fields or magnetic fields
2) When installing the DIN rail with screws, prevent looseness. Securely install the DIN
rail on the main body. Looseness, if any, causes the DIN rail, the main unit of the
product or wiring to come off due to vibration, impact, etc.
3) Use the DIN rail of 35 mm in width (Model PFP-50N/-100N manufactured by
OMRON).
4) When wiring on the main body of the product, use a crimp-style terminal suitable for
M3.5 screw.
5) Before distributing energy, confirm that the specification and wiring are correct.
6) Before performing operation and maintenance, fully understand the instruction
manual. Not doing so may result in electric shock, faults, accidents, injury, or
incorrect operation.
7) For the worker to turn OFF the power supply, install a switch or a circuit breaker
matching the requirements of IEC60947-1 and IEC60947-3, and display it
appropriately.
8) When setting the equipment, fully understand the manual.
9) When installing this product, keep it away as far as possible from the equipment
generating strong high-frequency noise or surge.
10) Touch this product after taking measures against static electricity, such as touching
metal that has been earthed.
11) To prevent inductive noise, isolate the wiring on the main body from the power line of
high voltage or large current. In addition, avoid wiring in parallel to or shared with
power lines. Use of a different conduit, a duct, or a shield line is an effective method
of wiring.
12) Do not install this product close to heating equipment (equipment having a coil,
winding wire, etc.).
13) Take measures to prevent metal, conductive wire, or chip generated during
processing from entering this product.
14) Do not use thinner-type products when cleaning. Use a commercially-available
alcohol.
15) Use an appropriate electrical power source and wiring to supply a power voltage and
in/output to this product. Otherwise, failures, burnout, or electric shocks may be
caused.
16) When installing the product on a wall, use screws to prevent looseness. Looseness,
if any, causes the main unit of the product or wiring to come off due to vibration,
impact, etc.
17) When multiple units are used, slide a horizontal connection hook until it is clicked.
18) When installing the product in a DIN rail, slide the DIN hook until it is clicked.
VI

19) Use the dedicated CT and dedicated CT cable specified by OMRON.
Model KM20-CTF-5A Model KM20-CTF-50A Model KM20-CTF-100ASplit type Model KM20-CTF-200A Model KM20-CTF-400A Model KM20-CTF-600A
Through
type Model KM20-CTB-5A/50A
Dedicated CT cable: Model KM20-CTF-CB3 (3 m)
20) It is not available for measuring inverter secondary side measurements.
21) Do not block the air ventilation holes of this product and the area surrounding them,
in order to allow heat to be emitted.
22) Check the terminal number and carry out wiring correctly. Connect nothing to the
terminals not used.
23) This product is a "Class A" (industrial environment product). Using this product in a
residential setting environment may cause electronic jamming. In that case,
appropriate measures for electronic jamming must be taken.
24) Use the dedicated CT in a low voltage circuit of 600 V or less.
Requests for Installation
zTo use this product for a long time
Use this product within the following temperature and humidity ranges.
Temperature: -10 to +55°C (without freezing and condensation)
Humidity: 25 to 85%RH
Not the temperature around the board but the temperature around this product must be within
55°C.
This product has a product service life that is determined by the service life of electronic parts
used inside. The service life of parts depends on the ambient temperature. As the ambient
temperature is higher, the service life is shorter, and as the temperature is lower, the life is
longer. Therefore, lowering the internal temperature of the product can lengthen its life.
Installing more than one Model KM1 close to each other or by arranging them in the up-down
direction requires the consideration of forced cooling by, e.g., sending air to the products
through a fan.
zTo achieve resistance against peripheral noise
To prevent inductive noise, isolate the wiring in the terminal block of the main body from the
power line of high voltage or large current. In addition, avoid wiring in parallel to or shared
with power lines. Use of a different conduit, a duct, or a shield line is an effective method of
wiring.
Attach a surge absorber or a noise filter to the equipment (equipment having inductance
components in particular, e.g., motor transformer, solenoid, and magnet coil) generating
noise around the product.
When installing this product, keep it away as far as possible from the equipment (high
frequency welder, high frequency machine, etc.) generating strong high-frequency noise or
surge.
VII

Precautions for Use
1) Make correct settings according to the targets to be monitored.
2) Do not hold and pull a cable.
3) This product is not a specific measuring instrument that has passed an examination
performed pursuant to the Measurement Act.
This product is not available to issue a certificate for electric energy.
4) When discarding this product, appropriately treat it as an industrial waste.
5) If this product is used in the environment of overvoltage category III, install a varistor
between lines on the power supply of this product/outside voltage measurement
input.
Before Using this Product
Referring to the instruction manual that came with this product, confirm the relevant items below.
When Confirmation item Confirmation contents
Appearance of the
product After purchasing the product, check the packing box for dents. If the inside has been damaged, measurements cannot be made properly
depending on the point of damage.
When the
product is
purchased Product format and
specification Confirm that the specification of the purchased product matches that desired.
At the time of
installation Installation place of the product When installing the product, allow the heat to radiate by preventing covering the area around the product. Do not cover the vent holes of the
main body.
When installing the products close to each other, consider forced cooling,
such as by sending air to the products through a fan.
When tightening a screw, be careful to prevent giving excessive stress.
In addition, tighten the screw to the specified torque (0.69 to 0.88 N・m)
and confirm that it does not loosen.
Wiring of terminals
Confirming the polarity of each terminal, perform wiring correctly.
At the time of
wiring
Power
supply/voltage
input
Perform correct wiring of power supply/voltage input. Incorrect wiring may
cause the destruction of the internal circuit.
Ambient
temperature The working ambient environment of this product ranges from -10 to
+55°C (without condensation or freezing).
To make the service life longer, install the product in such a way that the
ambient temperature becomes as low as possible. If the temperature is
high, consider forced cooling by a fan.
Vibration/impact Confirm that the vibration/impact of the installation environment satisfies
the specified standard.
(If the product is installed near a conductor, keep it away as far as
possible from the conductor, because vibration/impact is applied to it.)
Working
environment
Entry of foreign
matter Do not install the product in a place where liquid or foreign matter may enter it.
If corrosive gas, such as sulfur or chlorine, is generated, the environment
should be improved by removing the generation source or by installing a
fan.
VIII

Relevant Manuals
Man. No. Model Manual Name Details
SGTE-717 Model
KE1--FLK
Model KE1-
Model KE1
User’ s Manual for
Smart Measurement
and Monitoring
Instrument
Describes the overview,
characteristics, functions and
settings of Model KE1
SGTE-718 Model KE1-DRT-FLK Model KE1
User’ s Manual for
Device Net
Communication Unit
Describes the functions and
settings of DeviceNet
Communication Unit
SGTE-719 Model KM1/KE1 Model KM1/KE1
Smart Power Monitor
Communication Manual
for Smart Measurement
and Monitoring
Instrument
Describes the details of
communication for the Model
KM1/KE1 series
GAMS-010 Model KM1/KE1 KM1/KE1-Setting
User’ s Manual Describes how to use setting tools for the Model KM1/KE1
series and the setting
procedure.
Abbreviation
Abbreviation Format Name Unit type
PMU1A (Electric
power) Model KM1-PMU1A-FLK Power Measuring Unit
PMU2A (Power
Two-System) Model KM1-PMU2A-FLK Power Two-System Measurement Unit
Measurement master
(*1) (*3)
EMU8A
(Pulse/temperature) Model KM1-EMU8A-FLK Pulse/Temperature Input Unit Functional slave (*2)/(*3)
PGR1C
(Power/Earth
leakage)
Model
KE1-PGR1C-FLK Power/Earth Leakage Monitor Unit
PVS1C (Power
instantaneous
voltage drop)
Model
KE1-PVS1C-FLK Power/Instantaneous Voltage Drop Monitoring
Unit
Measurement master
(*1) (*2) (*3)
VSU1B
(Instantaneous
voltage drop)
Model
E1-VSU1B-FLK Instantaneous Voltage Drop Monitoring Unit
VAU1B
(voltage/current) Model KE1-VAU1B-FLK Voltage/Current Monitoring Unit
Functional slave
(*2) (*3) (*4)
CTD8E (CT
expansion) Model KE1-CTD8E CT Expansion Unit
ZCT8E (ZCT
expansion) Model KE1-ZCT8E ZCT Expansion Unit
CT expansion slave
(*2) (*4)
DRT (DeviceNet) Model
KE1-DRT-FLK DeviceNet Communication Unit Communication slave (*2) (*4)
*1 Slaves can be connected.
*2 Can be connected to the measurement master.
*3 Can be operated independently.
*4 Product of KE1.
IX

For the connection, refer to pages 1 to 9.
In addition, for the combinations, refer to Page A-19.
Manual Revision History
The manual revision symbol is given at the end of the catalog number on the
front cover and the bottom left of the back cover of the manual.
Revision symbol
Catalog number KANC-701
A
Revision
symbol Date of revision Reason for revision/ pages revised
A May 2012 Initial version
B June 2012 Correction of error in writing
X

Table of Contents
INTRODUCTION .....................................................................................I
Items on which you Agree by Using this Product..................................II
Safety Precautions.................................................................................IV
Safety Points..........................................................................................VI
Requests for Installation.......................................................................VII
Precautions for Use.............................................................................VIII
Before Using this Product....................................................................VIII
Relevant Manuals..................................................................................IX
Abbreviation...........................................................................................IX
Manual Revision History.........................................................................X
Table of Contents...................................................................................XI
Chapter 1 Overview..........................................................................1-1
1.1 Main features and functions............................................................................1-2
Main features..............................................................................................................1-2
Main functions.............................................................................................................1-3
1.2 Name and function of each part......................................................................1-6
Name of each part......................................................................................................1-6
Explanation of the display unit....................................................................................1-7
Setting switch..............................................................................................................1-8
1.3 System configuration.......................................................................................1-9
Model kind...................................................................................................................1-9
Configuration............................................................................................................ 1-10
1.4 Format standard............................................................................................1-13
Format standard...................................................................................................... 1-13
Chapter 2 Preparation ......................................................................2-1
2.1 Flow before use...............................................................................................2-2
Setting example..........................................................................................................2-3
2.2 Installation........................................................................................................2-6
External Dimensions (unit: mm).................................................................................2-6
Connection method....................................................................................................2-7
Installation procedure.................................................................................................2-9
2.3 Installation of dedicated CT...........................................................................2-12
Wire connection and installation of dedicated CT .................................................. 2-13
2.4 Input/output configuration and example of wiring diagram...........................2-14
Model KM1-PMU1A-FLK ........................................................................................ 2-14
Model KM1-PMU2A-FLK ........................................................................................ 2-16
Model KM1-EMU8A-FLK ........................................................................................ 2-19
Model KE1-CTD8E.................................................................................................. 2-20
XI

2.5 Wiring.............................................................................................................2-25
Requests for wiring..................................................................................................2-25
Wiring .......................................................................................................................2-25
Chapter 3 Functions.........................................................................3-1
3.1 List of functions...............................................................................................3-2
3.2 Basic functions................................................................................................3-3
Applicable phase wire...............................................................................................3-3
Synchronization selection for measuring block......................................................3-3
Dedicated CT type ....................................................................................................3-3
VT ratio.......................................................................................................................3-4
CT ratio ......................................................................................................................3-4
Low-cut function........................................................................................................3-4
Average count ...........................................................................................................3-5
Logging function........................................................................................................3-5
Signal detection........................................................................................................3-5
Measurement function ..............................................................................................3-6
3.3 Output function................................................................................................3-9
Output terminal 1/output terminal 2/output terminal 3 function setting ...............3-9
Integrated power amount pulse output.................................................................3-10
Phase-sequence..................................................................................................... 3-11
Alarm output............................................................................................................3-12
3.4 Event input function......................................................................................3-16
Event input NPN/PNP input mode setting ...........................................................3-16
Event input N-O/N-C input mode setting .............................................................3-16
Pulse entering count...............................................................................................3-17
ON time of pulse enter...........................................................................................3-17
Function using event input.....................................................................................3-17
3.5 3-STATE function .........................................................................................3-18
3-STATE target .......................................................................................................3-18
3-STATE HIGH threshold/3-STATE LOW threshold...........................................3-20
3-STATE hysteresis................................................................................................3-20
3.6 Other functions.............................................................................................3-21
Time .........................................................................................................................3-21
Initialization .............................................................................................................3-21
Chapter 4 Troubleshooting ..............................................................4-1
4.1 Flow of troubleshooting..................................................................................4-2
4.2 Assume based on operation indicator LED .................................................4-3
4.3 Assume based on the status.........................................................................4-4
4.4 Assume based on phenomena.....................................................................4-5
XII

Appendix..............................................................................................A-1
Product specifications................................................................................................. A-2
Rating of main unit...................................................................................................A-2
Main part specifications...........................................................................................A-3
Protection functions .................................................................................................A-5
Accessories...............................................................................................................A-6
Dedicated CT............................................................................................................... A-7
Specification..............................................................................................................A-7
External dimensions (unit: mm)..............................................................................A-7
List of parameters........................................................................................................ A-9
List of data logging items.......................................................................................... A-15
Model KM1/KE1 combination list ............................................................................. A-19
XIII

1-1
Chapter 1. Overview
Chapter 1. Overview............................................................................ 1-1
1.1 Main features and functions ................................................................................... 1-2
■Main features ................................................................................................ 1-2
■Main functions............................................................................................... 1-3
●Function by unit ......................................................................................... 1-3
●Output function .......................................................................................... 1-3
●Input function ............................................................................................. 1-5
●Communication function ............................................................................ 1-5
●Logging function of measurement data..................................................... 1-5
1.2 Name and function of each part............................................................................. 1-6
■Name of each part ........................................................................................ 1-6
■Explanation of the display unit...................................................................... 1-7
■Setting switch................................................................................................ 1-8
●How to use setting switches ...................................................................... 1-8
1.3 System configuration.............................................................................................. 1-9
■Model kind..................................................................................................... 1-9
■Configuration............................................................................................... 1-10
●Multiple-unit connection........................................................................... 1-10
●Minimum configuration ............................................................................ 1-11
●Maximum configuration ........................................................................... 1-11
●Multiple-system configuration.................................................................. 1-12
1.4 Format standard ................................................................................................... 1-13
■Format standard.......................................................................................... 1-13

0BOverview
1-2
Overview
1.1 Main features and functions
Main features
This section describes the main features fro Model KM1.
• Models providing the following functions are lined up and are selectable according to intended
end-usage.
Power measurement Power Two-System Measurement
Detection of over or under current Detection of over/under voltage
Temperature measurement Event input
Pulse input count Pulse output
ON time of pulse input Simple measurement
CO2emissions/conversion to electric power charge
3-STATE function (power, current, and voltage)
Reverse phase detection
Power measurements of two different systems insulated each other can be made using a unit.
The installed logging function allows the user to select eight cycles (5 min, 10 min, 30 min, 1
hour, 2 hours, 6 hours, 12 hours, 24 hours) available for saving data.
Two types of communication protocol, CompoWay/F (*1) and Modbus (RTU) (*2), can be
supported by one unit.
Conforms to the safety standard (EN/IEC).
[Connection of multiple units (PMU1A (electric power)/PMU2A (power two-system) + EMU8A
(pulse/temperature))]
・According to the event input of EMU8A (pulse/temperature), the total power consumption
measured with PMU1A (electric power) and PMU2A (power two-system) can be classified to the
three states: HIGH state, MIDDLE state, and LOW state. (3-STATE function)
[Connection with Model KE1]
Connection with Model KE1-CTD8E can expand current CT, allowing the user to make
measurements at 36 points maximum.
After this, this manual also describes the expansion function of current CT when this product is
connected to KE1-CTD8E (CT expansion unit).
For Model KE1-CTD8E, refer to "Model KE1 User's Manual" (SGTE-717).
*1 CompoWay/F is a unified communication procedure within Omron’s generic serial communication.
It has commands conforming to the time-proven FINS in the unified frame format and Omron's
programmable controller, making easy the communication between the personal computer and the
components.
*2 Communication control system conforming to RTU Mode of Modbus Protocol. Modbus is a
registered trademark of Schneider Electric.

1.4 Format standard
1-3
Overview
Main functions
This section describes main functions of Model KM1.
zFunction by unit
PMU1A (Electric power) : Provides the power measurement function and 3-STATE
function.
PMU2A (Power two-system) : Provides the power measurement function and 3-STATE
function. Two-system measurements can be done.
EMU8A (Pulse/temperature) : Has an event input and temperature input. It provides
temperature measurement function.
CTD8E (CT expansion) : CT can be expanded to perform power and current multi-circuit
measurements.
zOutput function
The following function is provided as an output function.
1) Total power consumption pulse output
PMU1A
(Electric power)
PMU2A
(Power two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT expansion)
{{××{: With function ×: Without function
When the total power consumption reaches the pulse output unit set by the user, pulses are
output from output terminal 1, output terminal 2, and output terminal 3 (terminal set by the
output terminal function setting).
The pulse ON time is normally fixed to 500 ms. The time for turning OFF the pulse is 100 ms
minimum. However, if it reaches the pulse output unit again within 600 ms after having reached
the pulse output unit, the pulse ON time becomes shorter, because higher priority is given to
the next output. After that, pulse of 100 ms is turned OFF, and then the next pulse is turned ON.
(The minimum pulse ON time is 100 ms.)
Pulse output is judged at sampling intervals.
Pulse output timing
500ms 500ms 500ms 500ms
100ms 100ms 100ms 500ms
100ms
*▼indicates that the pulse output unit is reached.

0BOverview
1-4
Overview
2)3-STATE output
PMU1A
(Electric power)
PMU2A
(Power two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT expansion)
{{××{: With function ×: Without function
This function sets HIGH threshold and LOW threshold to assign total power consumption and
total time to HIGH, MIDDLE, and LOW states.
When one of the electric power, current, voltage, and event input is selected as a target for
judgment based on the setting, it can be classified to the three conditions (HIGH, MIDDLE, and
LOW) by setting HIGH threshold and LOW threshold. If a value is more than the HIGH
threshold, the condition is assigned to HIGH. If less than the LOW threshold, the condition is
assigned to LOW. In other cases, the condition is assigned to MIDDLE. The total power
consumption and total time in each condition can be read.
For details, refer to Page 3-18.
* The 3-STATE output using event input is applied only when EMU8A (pulse/temperature) is
connected.
3)Alarm output
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT expansion)
Active power alarm {{× {
Over current alarm {{× {
Under current alarm {{× {
Over voltage alarm {{× ×
Under voltage
alarm {{× ×
Power factor alarm {{× {
Reactive power
alarm {{× {
Temperature alarm × × {×
Reverse phase
alarm {{× ×
O: With alarm output
X: Without alarm output

1.4 Format standard
1-5
Overview
zInput function
The input functions include the following functions.
• Event input 7 points
PMU1A
(Electric power)
PMU2A
(Power two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT expansion)
× × {× {: With function X: Without function
A pulse output from external equipment is counted as an input pulse.
Using the event input can achieve the 3-STATE function, whose target for judgment includes
the following: a power original unit calculated by dividing the total power consumption, which is
measured with PMU1A (electric power) and PMU2A (power two-system), by the total value of
two input count numbers (event inputs 1 and 2, event inputs 3 and 4, and event inputs 5 and 6),
a pulse input ON time measured by using OR judgment, and an event input.
The power original unit and the pulse input ON time are used for measurement of tact power in
a production line and for calculation of operating time of equipment, respectively.
* The 3-STATE function using power original unit and event input are available only when the
product is connected to PMU1A (electric power), PMU2A (power two-system).
zCommunication function
The communication function using CompoWay/F and Modbus (RTU) is available.
zLogging function of measurement data
PMU1A
(Electric power)
PMU2A
(Power two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT expansion)
{{{U{: With function
U: Backup at intervals of 5 min and alarm history only.
Model KM1 has a data logging function. Log data is divided into the three types: data that is backed
up every 5 min, data that is backed up at arbitrary timing (5 min, 10 min, 30 min, 1 hour, 2 hours, 6
hours, 12 hours, or 24 hours), and alarm history that is backed up when an alarm is generated.
1) Data that is backed up every 5 min
This data includes the following items.
Total active power consumption, total regenerated energy, and total reactive power
3-STATE HIGH total power consumption, 3-STATE MIDDLE total power consumption,
3-STATE LOW total power consumption
3-STATE HIGH total time, 3-STATE MIDDLE total time, 3-STATE LOW total time
Pulse input ON time, pulse input count
2) Data that can be saved as log data at arbitrary timings
Log data is saved in conjunction with the time of the main body.
For the items, refer to "List of log data to be saved" on Page A-15.
3) Alarm history
Histories of alarms generated in the past can be confirmed via communication.
Data is saved every 5 min.
For details, refer to Page 3-12.

0BOverview
1-6
Overview
1.2 Name and function of each part
Name of each part
1
3
4
7
9
10
28
5
1
66
7
[1] DIN hook
A hook, which is mounted in each of the upper and lower parts of the main body, is used to
install the product in the DIN rail or on a wall. For the installation procedure, refer to Page 2-9 to
2-11.
[2] Setting switch
DIP switch and rotary switch are used. For the functions and setting procedure, refer to Page
1-8.
[3] Display unit
Displays the operating status of the main body by lighting or blinking LED. For details on the
function of each LED, refer to Pages 1-7 to 4-3.
[4] Display cover
This cover protects the display unit and USB port.
[5] USB port
Insert a USB cable to carry out USB communication with the main body.
[6] Connection connector cover
This cover protects the connection connector (on the main body side).
[7] Horizontally connecting hook
A hook is installed in each of the upper and lower positions. These hooks are used to connect
units to each other.
For the connection procedures ([7] to [9]), refer to Pages 2-7 to 2-8.
[8] Connector (on the main body side)
When connecting units to each other, insert the connector (accessory).
[9] Connector (accessory)
Inserted into the connector to connect connectors to each other (main body side).
* It does not come with the measurement master.
[10]Rating name plate
Displays the model name, ratings, terminal assignments, etc.