Omron KM-N3-FLK User manual

On-Panel Power Monitor
model KM-N3-FLK
Users Manual
1. Overview of the unit
2. Installation and wiring
3. Basic use
4. Settings needed to measure
electricity
5. Other Functions
6.
Detailed settings for communications
7. Troubleshooting
8. Appendices
Catalog no. N214-E1-02
Thank you for purchasing the On-panel Power Monitor, model KM-N3-
FLK (referred to as model KM-N3 in this manual).
This Users Manual describes the functions, performance, and
application methods needed for optimum use of the unit.
Please observe the following when using this unit.
• This product is designed for use by qualified personnel with a
knowledge of electrical systems.
• Before using the product, thoroughly read and understand this Users
Manual to ensure correct use.
• Keep this Users Manual in a safe location so that it is available for
reference whenever required.

Index
2
Agreement regarding use..................................................................................................4
Safety precautions .............................................................................................................6
Important safety points......................................................................................................8
Precautions for correct use...............................................................................................9
Manual revision history ...................................................................................................11
1. Overview of the unit
1.1 Main features ..............................................................................................................12
1.2 Device configuration..................................................................................................13
1.3 Names of the parts and their functions....................................................................14
1.4 Dimensions .................................................................................................................16
1.5 Multi-circuit metering.................................................................................................17
1.6 Multi-address system.................................................................................................19
1.7 Mode configuration ....................................................................................................20
2. Installation and wiring
2.1 Attaching the body of the unit...................................................................................21
2.2 Wiringthe CTs .............................................................................................................23
2.3 Wiring the power supply............................................................................................25
2.4 Wiring the measured voltage input...........................................................................26
2.5 Fitting the CTs to the measuring wires ....................................................................28
2.6 Pulse output wiring ....................................................................................................29
2.7 RS-485 wiring..............................................................................................................33
2.8 Wiring diagrams .........................................................................................................35
3. Basic use
3.1 Turning the power on.................................................................................................38
3.2 Switching between modes.........................................................................................39
3.3 How to read the measurements ................................................................................41
3.4 How to read the setting values..................................................................................44

3
Index (continued)
4. Settings needed to measure electricity
4.1 Setting items for measuring electricity ....................................................................48
4.2 Circuit settings ...........................................................................................................49
4.3 RS-485 communication settings ...............................................................................55
4.4 Pulse output settings.................................................................................................58
5. Other Functions
5.1 Voltage assignment....................................................................................................59
5.2 Measuring high voltage .............................................................................................60
5.3 Display unit conversion.............................................................................................61
5.4 Automatic LCD OFF ...................................................................................................62
5.5 Alarm display with negative effective power value.................................................63
5.6 Tariff feature................................................................................................................64
5.7 Change password.......................................................................................................65
5.8 Checking software version........................................................................................66
5.9 Initialize .......................................................................................................................67
5.10 Restart .......................................................................................................................67
6. Detailed settings for communications
6.1 Overview of communications....................................................................................69
6.2 Modbus........................................................................................................................70
6.3 CompoWay/F...............................................................................................................79
6.4 Address map...............................................................................................................93
7.Troubleshooting
7.1 Warnings .....................................................................................................................97
7.2 Troubleshooting .........................................................................................................98
8.Appendices
8.1 Specifications ...........................................................................................................101
8.2 ASCII code table .......................................................................................................103
8.3 14 segment displays and 7 segment displays.......................................................105

4
2
Agreement regarding use
Unless otherwise specifically agreed, you agree that the conditions in this agreement apply to your use of this Omron
product, irrespective of the place of purchase.
1. Definitions
This defines some terms used in this agreement.
(1) Omron products: FA system equipment, general-purpose control devices, sensors, and electronic/mechanical
components under Omron brand.
(2) Catalogs: Omron catalogues, including, without limitation, Omron "Best" Control Equipment Catalog, and
General Catalog for Electronic/Mechanical Components, specifications, instructions and user manuals for
Omron Products, whether or not provided electronically.
(3) Usage Conditions: Usage conditions, rating, performance, operating environment, handling instructions,
warnings, restrictions on use, etc. of Omron Products described in the Catalogs.
(4) Customer Application: Any application of Omron Products by a customer to include, but are not limited to,
embedding and/or using Omron Products in their parts/components, electronic substrates, devices, equipment
or systems manufactured by customers.
(5) Fitness: (a) fitness for a particular purpose, (b) performance, (c) non-infringement of third-party intellectual
property, (d) compliance with laws and regulations and (e) conformity to standards of an Omron Product in the
Customer Application.
2. Cautions regarding content
Be aware of the following points with regard to the content of Catalogs.
(1) Rated values and performance values are based on stand-alone tests using each separate condition, and
Omron does NOT warrant any rated values and performance values for multiple composite conditions.
(2) Reference data is provided for your reference only. Omron does NOT warrant that Omron Products work
properly at all times as provided in the reference data.
(3) Application examples are provided for your reference only. Omron does NOT warrant the Fitness of Omron
Products under such application.
(4) Omron may discontinue the production of Omron Products or change their specifications for the purpose of
improving such products or for other reasons entirely at its own discretion.
3. Precautions
You are deemed to accept the following terms when you adopt or use Omron Products:
(1) Use Omron Products in compliance with Usage Conditions including rating and performance.
(2) Confirm Fitness of Omron Products in Customer Application and use your own judgment to determine the
appropriateness of using them in such application. Omron does NOT warrant the Fitness of Omron Products in
Customer Application.
(3) Confirm beforehand that Omron Products are properly wired and installed for their intended use in your overall
system.
(4) When using Omron Products, make sure to (i) maintain a margin of safety in relation to the published rated and
performance values, such as introducing redundancy, (ii) design to minimize risks to any Customer Application
in case of failure of any Omron Products, (iii) adopt system-wide safety measures to notify risks to users, and
(iv) conduct regular maintenance on Omron Products and Customer Application.
(5) Omron Products are designed and manufactured as general-purpose products for use in general industrial
products. They are not intended to be used in the applications described below, therefore if you use Omron
products in these applications, Omron provides no warranty for Omron products. However, this excepts cases
where the use is a special use intended by Omron or where Omron has specifically agreed, even when used in
the following applications.
(a) Applications with stringent safety requirements (For example, nuclear power control equipment, combustion
equipment, aerospace equipment, railway equipment, elevator and lift equipment, amusement equipment,
medical equipment, safety equipment, and other applications that could cause physical injury or result in the loss
of life.)
(b) Applications that require high reliability (For example, supply systems for gas, water and electricity, etc., 24 hour
continuous operating systems, financial settlement systems and other applications that handle rights and
property.)

5
Agreement regarding use(continued)
(c) Applications under severe conditions or in severe environments (For example, outdoor equipment, equipment
exposed to chemical contamination, equipment exposed to electromagnetic interference and equipment
exposed to vibration and shocks.)
(d) Applications under conditions or environments not described in catalogs or other publications.
(6) In addition to the applications listed in 3.(5) (a) to (d), the products in this publication are not intended for use in
automobiles (including for two-wheeled vehicles, and this description applies hereafter). Do not use for
applications involving fitting to automobiles. Consult Omron staff for information about products suitable for use
in automobiles.
4. Warranty
The warranty for Omron Products are as follows:
(1) Warranty period: The Warranty shall apply for one year from the date of purchase.
(Unless otherwise described in Catalogs.)
(2) Warranty content: Omron will provide, at its own discretion, either of the following two services as the sole
remedy for a malfunctioning Omron Product:
(a) Repair of the malfunctioning Omron Product(s) at an Omron maintenance service location at no charge to the
customer (This repair service is not available for electronic/mechanical parts.)
(b) Replacement of the malfunctioning Omron Product(s) with the same number of replacement/alternative products
at no charge to the customer.
(3) Exceptions: This warranty of Omron Products does not apply if the cause of the malfunction falls under any of
the following:
(a) Usage in a manner other than the original intended use for the Omron Products.
(b) Usage other than as described in the Usage Conditions.
(c) Usage that is not in accordance with Section 3 (Precautions) above.
(d) Modification or repair made to the Omron Products by other than Omron personnel.
(e) Software program by other than Omron staff
(f) Causes which could not have been foreseen with the level of science and technology at the time of shipping
from Omron.
(g) Causes other than those above originating from other than Omron or Omron Products (including force majeure
such as natural disasters).
5. Limitation of liability
The warranty express in this agreement is the entire warranty for this Omron product.
Omron and dealers selling Omron products accept no responsibility for damages arising from the use of Omron
products.
6. Export control
Comply with the applicable laws and regulations of Japan and related nations relating to security export controls
when exporting or providing this Omron product or technical documents to non-residents. If you do not comply with
these laws and regulations, we may be unable to supply you with Omron products or technical documents.
Notice
• It is not permitted to reproduce, copy, or reprint this manual in part or in full without permission.
• Changes to this manual may be made without notice.
• Every effort has been made to ensure the accuracy of this manual, however please contact us or your dealer
at one of the addresses shown at the back of this manual if you find any unclear points or errors.
At this time, please also advise us of the catalog number found at the back of this manual.

6
Safety precautions
Regarding the displays used to ensure safe operation and their meanings
The following indications and symbols are used in this manual for precautions so that you can use the product
safely. The precautions here include important information regarding safety. Please follow these instructions.
The indications and symbols are as follows.
Warning displays
Meanings of the symbols
Caution Indicates a potentially hazardous situation which, if not avoided, will
result in minor or moderate injury, or there may be property damage.
•Mandatory actions
Indicates a general action that must be performed by the user.
•Explosion caution
Indicates possibility of explosion under special conditions.
•Electrical shock caution
Indicates possibility of electric shock under special conditions.
•Disassembly prohibition
This indicates that there is the danger of electric shock or other injury if the unit
is disassembled.
•General prohibitions
Indicates a general prohibition without particular categorization.

7
Safety precautions(continued)
* CT: Current Transformer
Caution
Property damage may occur due to fire.
Tighten the terminal screws to the specified torques.
After tightening the screw, check that the screw is not loose.
M3 screw : 0.5 to 0.58N·m
Minor or moderate injury or property damage may occur due to explosion.
Do not use in locations exposed to flammable or explosive gases.
Breakdown or explosion may occasionally occur.
Use the power voltage and load within the specified and rate ranges.
Electric shock may occasionally occur.
Do not touch any of the terminals while the power is being supplied.
Electric shock may occasionally occur.
Always make sure that the power to the circuit the CT is being attached to is turned
OFF before connecting the CT*.
Minor electric shock, fire, or malfunction may occasionally occur.
Do not supply a current to the CT input terminal that exceeds the maximum CT
secondary current.
Minor electric shock, fire, or malfunction may occasionally occur.
Never disassemble, modify, or repair the product.

8
Important safety points
Observe the following to ensure safe use of model KM-N3.
• Do not use or store the product in any of the following locations.
– Locations subject to shock or vibration
– Unstable locations where the user might fall/tumble down
– Locations subject to temperatures or humidity outside rated ranges
– Locations subject to condensation as the result of severe changes in temperature
– Outside or otherwise exposed to direct sunlight and weather
– Locations subject to static electricity or other forms of noise
– Locations exposed to electromagnetic fields
– Locations subject to exposure to water or oil.
– Locations subject to exposure to salt water spray.
– Locations subject to corrosive gases (in particular, sulfide gas and ammonia gas).
– Locations subject to dust (including iron dust).
– Locations subject to exposure to solvents
• Be sure to wire properly with the terminals with correct symbols.
• Use AWG20 to 16 (with a cross-section of 0.5 to 1.5mm2) to wire the power supply terminals. The heat resistant
temperature of the wire is 85 degree or more.
• Use AWG18 to 14 (with a cross-section of 0.75 to 2.0mm2) to wire the CT and measurement voltage terminals.
Use the crimping terminals of the round shape or Y-shape compatible with the M3 screw. The heat resistant
temperature of the wire is 85 degree or more.
• Use twisted or solid wire AWG24 to 16 (with a cross-section of 0.25 to 1.5mm
2
) to wire communication terminals. The
heat resistant temperature of the wire is 85 degree or more.
• Before using or maintaining the product, thoroughly read and understand this manual.
• Understand the user manual before setting the device.
• Do not pull cables.
• For compliance with standards and safety, in order that the worker may turn OFF the power immediately, install a
branch circuit breaker conforming to the voltage at which the device is used and the appropriate standards of the
country where the device is used (US: UL Listed, Canada: cUL Listed, and other countries: for example, IEC60947-
1 and IEC60947-3), and indicate that the breaker is a device to disconnect the circuit for product safety. A branch
circuit breaker with a rated current of 1A is recommended.
• Do not touch any of the terminals while the power is being supplied.
• Do not install the product close to heat-producing devices (those using coil elements, for instance).
• Separate the product wiring from high-voltage or high-current power lines to prevent inductive noise. Do not place
the product wiring parallel to or in the same ducts or conduits as power lines. Use separate ducts, separate
conduits, or shielded cables to prevent noise.
• This is a “class A” product. In residential areas it may cause radio interference. The user may be required to take
adequate measures to reduce interference if this occurs.
• Use the product by incorporating it in a panel 1 to 8 mm thick. If the panel thickness is not appropriate or the
mounting method is not appropriate, the product might be come off.

9
Precautions for correct use
• This product is not categorized as "a specified measuring instrument" officially approved by an organization
specified in relevant measurement acts. It cannot be used to certify power usage.
• Set the parameters of the product so that they are suitable for the system being measured.
• Use varistors between the outer power and voltage measuring input wires when this product is installed in an
overvoltage category III environment.
• This product cannot be used to measure the inverter’s secondary side.
• Ensure that the rated voltage is reached within 2 seconds of turning the power on.
• When cleaning the unit, make sure the power is off and wipe the surface of the unit with a soft dry cloth. Do not use
chemicals including solvents such as thinners, benzine, or alcohol.
• You cannot use the CT dedicated for use with the Omron KM series (model series KM20-CTF, model series KM-
NCT) . Use a CT whose secondary output is 1A or 5A.
• The data for active energy is saved at 5 minute intervals. The data for the 5 minutes preceding the unit powering off
may not be saved under some circumstances.
• Dispose of this product appropriately as industrial refuse in accordance with local and national regulations.
Trademark Information
• Modbus is a registered trademark of Schneider Electric.
• Other company names and product names in this document are the trademarks or registered trademarks of their
respective companies.

10
Precautions for correct use (continued)
Safety standard compatibility
If the equipment is used by a method not specified by the manufacturer, the equipment might lose
the equipped protection.
The temporary overvoltage occurring on the main power supply must not exceed the following
values:
Confirm the voltage using the power supply voltage of the product that you purchased.
Short-time overvoltage: 1200 V+ (power supply voltage)
Long-time overvoltage: 250 V+ (power supply voltage)
For safety standard compliant, Listing CT of XOBA / XOBA7 category must be used.
<Meaning of the warning symbols on the product>
Electric shock may occasionally occur. Use the product according to this content.
Heat resistant temperature of wires that are used with the product needs to be more than
85 degree.

11
Manual revision history
A manual revision code appears as a suffix to the catalog number on the front cover and back cover of the manual.
Revision
number Date of revision Reason for revision, pages revised
01 A August 2016 First edition
02 July 2017 UL certified.
Description of operability-confirmed converter: Modified
Revision number
Catalog no. N214-E1-02

12
1.Overview of the unit
1.1 Main features
• Supports international standards
It complies with the international IEC accuracy standards and can be connected using generic CTs.
• Multi-circuit metering
Multi-circuit metering is possible with one unit, with up to four circuits metered by 1-phase 2-wire, and up to 2
circuits metered by 1-phase 3-wire and 3-phase 3-wire. It is also possible to measure multiple 1-phase 2-wire with
different phases branching off a 1-phase 3-wire, and to simultaneously measure both 1-phase 3-wire and 1-phase
2-wire.
• Multi-address system
There can be a maximum of 4 circuits in one unit. The circuits act as independent power monitors, each able to
measure, each having different settings, and each able to be allocated different communications addresses. You
can manage individual circuits as electricity monitors from a host system, so it is easy to build a communications
system and add places for measuring.
• Pulse output
The unit has 4 ports for outputting pulses each time the active energy exceeds set values. You can allocate each
circuit a pulse output port in a multi-circuit metering setup.
• RS-485 communications
You can use the Modbus (*1) and CompoWay/F (*2) protocols for RS-485 communications.
*1. Modbus is a communications control system that conforms with the RTU Mode of the Modbus Protocol.
*2. CompoWay/F is Omron's unified communication procedure for general serial communications. It has a unified
framework format and has commands compliant with FINS which works well with Omron programmable controllers, for
instance, simplifying communications between host devices (computers for example) and components.

13
1.Overview of the unit
1.2 Device configuration
You cannot use the CT dedicated for use with the Omron KM series (model series KM20-CTF, model series KM-
NCT, etc.) with this unit.
Breaker
On-Panel
Power Monitor
Model KM-N3-FLK
For example:
PLC
Pulse output 1
Host device
RS-485
Modbus
CompoWay/F
Generic CT
Pulse output 2
Pulse output 3
Pulse output 4
Generic CT
Generic CT
Generic CT
For example:
PLC
For example:
PLC
For example:
PLC
Metered voltage
Operating
power

14
1.Overview of the unit
1.3 Names of the parts and their functions
Item Description
MODE• Key
Long press: The measurement mode is switched with the setup mode.
[MODE] key (measurement mode): The measurement circuit is changed.
[ ] key (setup mode): Change of the measurement circuit / Digit shifting
when a numerical value is input
I/V/F/PF• key
[I/V/F/PF] key (measurement mode): The display of current, voltage,
frequency, or power factor is switched.
[] key (setup mode): Items or values are changed (up)
P/Q• key
[P/Q] key (measurement mode): The display of effective power or reactive
power is switched.
[ ] key (setup mode): Items or values are changed (down)
E1•ESC key
[ESC] key (measurement mode): Cancel
[E1] key (setup mode): The display of each integrated electric energy is
switched.
E2•ENTER key
[ENTER] key (measurement mode): Select/Determine
[E2] key (setup mode): The display of each resettable integrated electric
energy is switched.
Communication address / Menu display
When ADDRESS is lit (in the measurement mode):
The communication address is displayed.
When MENU is lit (in the setup mode): The menu number is displayed.
In-operation CT display The CT number in the condition of measurement or setup (CT1 to CT4) is
displayed.
Tariff display The tariff number which is saving the integrated effective energy (T1 to T4) is
displayed.
Output/communication
state display
COMM Blinks when RS-485 communications are in progress.
OUTPUT Lit when the pulse output is set.
1 Lit when pulse is output from OUT 1.
2 Lit when pulse is output from OUT 2.
3 Lit when pulse is output from OUT 3.
4 Lit when pulse is output from OUT 4.
Measured value display /
Setup value display
First display /
instantaneous value
display
Instantaneous values or setup values are displayed (on rows No. 1-3).
Second display /
Integrated value
display
The integrated value is displayed (on row No. 4).
<Front> <LCD display details>

15
1.Overview of the unit
1.3 Names of the parts and their functions (continued)
Item Description
Measurement auxiliary
display
RESETTABLE Lit when resettable integrated electric energy is displayed.
----- Lit when integrated leading reactive electric energy is displayed.
Total Q Lit when total integrated reactive electric energy is displayed.
State display SET Lit in the setup mode.
Blinks when a warning occurs.
Unit display The unit of each measured value is lit.
Power supply terminal Power supply voltage is input to this terminal.
RS-485 communication
terminal
RS-485+ (1) RS-485 + terminal
RS-485- (1) RS-485 - terminal
RS-485+ (2) RS-485 + terminal (for transition wiring)
RS-485- (2) RS-485 - terminal (for transition wiring)
RS-485E RS-485 terminating resistor terminal
Pulse output terminal
OUT1 Circuit A pulse output terminal
OUT2 Circuit B pulse output terminal
OUT3 Circuit C pulse output terminal
OUT4 Circuit D pulse output terminal
COM Common terminal for outputting pulse
Current input terminal Terminal to connect the CT cable for CT1 to CT4
Measured voltage input terminal Measured voltage is input to this terminal.
Terminal array label Model, power supply voltage, terminal array, serial number, and so on are
written on this label.
Wiring label A wiring diagram of voltage and current is written on this label.
Mounting adapter Adapter to fix the main unit to the panel
<Right side surface> <Rear> <Left side surface>

16
1.Overview of the unit
1.4 Dimensions
91
59
55
60
(64)
4
110
10
23.8
Optional Products (Order Separately)
Terminal Covers
E53-COV24 (Three Covers provided.)
Waterproof Packing
Y92S-P10 (for DIN 96 × 96)
Mounting Adapter
Y92F-51 (Two Adapters provided.)
The Waterproof Packing is provided with the KM-N3.
Order the Waterproof Packing separately if it
becomes lost or damaged.
The Waterproof Packing for the front-panel Setup
Tool port must be periodically replaced because they
may deteriorate, shrink, or harden depending on the
operating environment.
The replacement period will vary with the operating
environment.
Check the required period in the actual application.
Use 3 years or sooner as a guideline.
One pair is provided with the KM-N3.
Order this Adapter separately if it becomes lost
or damaged.
96
96
92
Panel cut-out dimensions for mounting
92
+0.8
0
+0.8
0
Units (mm)

17
1.Overview of the unit
1.5 Multi-circuit metering
Multi-circuit metering is possible with this product. Measuring circuit refers to the measurement point where electricity
measuring is conducted. Furthermore, this product measures voltage commonly across all circuits and measures
current with each separate circuit by using generic CTs.
●Maximum number of measuring circuits for each phase
and wire type
You can connect up to 4 generic CTs to this unit. The phase and wire types and the usable number of measuring
circuits are shown in the following table.
Refer to "2.8Wiring diagrams (35)" for more on wiring each of the phase and wire types.
• Set 1-phase 2-wire voltage selected when measuring multiple 1-phase 2-wire with different phases branching off a
1-phase 3-wire switchboard.You can measure 1-phase 2-wire by selecting the corresponding voltage.
• Set 1-phase 3-wire composite to measure both the main 1-phase 3-wire switchboard and a 1-phase 2-wire
branching off.
You can measure 1-phase 2-wire by selecting the corresponding voltage.
• Refer to "5.1Voltage assignment (58)" for more on 1-phase 2-wire voltage selected and 1-phase 3-wire
composite.
Phase and wire type
Abbreviatio
ns for
phase and
wire types
Maximum number of
measuring circuits Circuits used
3-phase 4-wire 3P4W 1 circuit Circuit A
1-phase 2-wire 1P2W 4 circuit Circuit A, Circuit B, Circuit C, Circuit D
1-phase 3-wire 1P3W 2 circuit Circuit A, Circuit C
3-phase 3-wire 3P3W 2 circuit Circuit A, Circuit C
1-phase 2-wire
voltage selected 1P2W2 4 circuit Circuit A, Circuit B, Circuit C, Circuit D
1-phase 3-wire
composite 1P3W2
1-phase 3-wire: 1 circuit Circuit A
1-phase 2-wire: 2 circuit Circuit C, Circuit D

18
1.Overview of the unit
1.5 Multi-circuit metering (continued)
●Allocating the circuits used and the CTs for each phase
and wire type
The following table shows the phase and wire types and the CT allocations for each measuring circuits. As circuit
A is used irrespective of the phase and wire type, you must make settings for measurement ("Circuit A
settings(49)").
By enabling circuits B to D to increase the number of measurement points ("Settings for circuits B to D (when
measuring 2 circuits or more) (52)"), you can meter electricity using the required number of circuits. This are
disabled by default.
Phase and wire
type
Abbreviatio
ns for
phase and
wire types
Measuring circuits
Circuit A Circuit B Circuit C Circuit D
3-phase 4-wire 3P4W CT1, CT2, CT3
  
1-phase 2-wire 1P2W CT1 CT2 CT3 CT4
1-phase 3-wire 1P3W CT1, CT2 CT3, CT4 
3-phase 3-wire 3P3W CT1, CT2 CT3, CT4 
1-phase 2-wire
voltage selected 1P2W2 CT1 CT2 CT3 CT4
1-phase 3-wire
composite 1P3W2 CT1, CT2 CT3 CT4

19
1.Overview of the unit
1.6 Multi-address system
This product is a multi-address system where different communications addresses (numbered in order) are allocated
to each circuit.The communications addresses correspond to each measuring point, so data transmission
management from the host device is simplified.
The following diagram is an overview of the multi-address system.
The measurement values and setting values for individual circuits are accessed via communications addresses for
each of the circuits. The common settings are common to all of the circuits, so they can be accessed using any of the
communications addresses, which allows changes to settings for all of the circuits at once.
Refer to "6.Detailed settings for communications (69)" for details about commands, responses, and address maps.
Caution
• Each circuit on this product needs to be allocated different communications addresses (numbered in order).
Even if you connect several of these products on the same RS-485 line, all of the circuits need to be allocated
different communications addresses.
Circuit D
Measured
value
Setting
value
Communi
cation
address
For 1-phase 2-wire (maximum of 4 circuits) For 1-phase 3-wire, 3-phase 3-wire
(maximum of 2 circuits)
Model KM-N3 Model KM-N3
Circuit C
Measured
value
Setting
value
Circuit B
Measured
value
Setting
value
Circuit A
Measured
value
Setting
value
Communi
cation
address
Communi
cation
address
Communi
cation
address
Circuit A
Measured
value
Setting
value
Communi
cation
address
Circuit C
Measured
value
Setting
value
Communi
cation
address

20
1.Overview of the unit
1.7 Mode configuration
This model has three modes: measuring mode, setting mode, and communication setting mode.
– Measuring mode: The measured values for each circuit are displayed.
– Setting mode: By operating keys on the body of the unit you can change settings for each of the circuits, and
make common settings for communications, output, the display, etc.
– Communication setting mode: Make settings on the units using RS-485 communication.
• In the measuring mode and setting mode, the circuit B to D items are displayed by switching the enable/disable
settings for each of the circuits to "ON" (enabled). (The circuits indicated inside the dotted lines in the above
diagram are "OFF" (disabled) in the default state.)
• The alarm screen is displayed when an alarm has occurred.
Circuit D
Measurement
value
Circuit C
Measurement
value
Circuit B
Measurement
value
Circuit A
Measurement
value
CircuitA
Setting
value
CircuitB
Setting
value
CircuitC
Setting
value
CircuitD
Setting
value
Other
Setting
value
Common
Setting
value
Start-Up
Measurement mode
Communication
setting mode
Configuration mode
Hold Down Command
Password input
Alarm
screen
[MODE・ ]
[MODE・ ]
[MODE・ ]
Using RS-485
communication,
change setting from
a host device.