Omron, KM-N3-FLK Series

The New KM-N2 and KM-N3 power monitors

Energy management starts by continuously monitoring power.
The KN-N2 and KN-N3 enable all types of power measurement with easy installation and easy system construction.
You can mount them on or in control panels and distribution boards and take advantage of their compatibility with power supplies around the world.

Many host communications methods

Multi-address System

Push-In Plus Terminal Block

The structure of Push-In Plus terminal blocks helps reduce wiring mistakes with easy-to-insert terminals that hold wires firmly (RS-485 communications and pulse output terminals).

Efficient Initial Setting Tool *1

- Easy-to-use setting functions of the communications and measurement conditions
- Save/Load setting by CSV file

*1. Supported Version of main unit: V2.0.0 or higher for all models.
*2. Except for KM-N2-FLK.
*3. For this software, compatibility of the USB/RS-485 converter has been verified for SI-35USB (LINEEYE Co.,Ltd.). K3SC-10 is not compatible.

Wiring Error Detection

Ratings (Power Monitor)

Model		KM-N3-FLK
Applicable phase wiring methods		Single-phase two-wire, single-phase three-wire, three-phase three-wire, and three-phase four-wire
Number of measured circuits		Single-phase two-wire: 4 circuits max., Single-phase three-wire or three- phase three-wire: 2 circuits max., Three-phase four-wire: 1 circuit
Power supply voltage (operating frequency)		100 to 240 VAC (50/60 Hz)
Power supply allowable voltage range		85% to 110% of rated power supply voltage
Power consumption		7 VA max.
Input	Rated input voltages	Single-phase, 2-wire: 100 to 277 VAC Single-phase, 3-wire: 100 to 240 VAC (L-N) or 200 to 480 VAC (L-L) Three-phase, 3-wire: 173 to 480 VAC (L-L) Three-phase, 4-wire: 100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)
	Allowable supply voltage range	85% to 115% of rated power supply voltage
	Connectable CTs	General-purpose CT with a rated secondary current of 1 A or 5 A *
	Maximum CT secondary current	6 A
	Rated input frequency	50/60 Hz
Ambient operating temperature		-25 to 55°C (with no condensation or icing)
Ambient operating humidity		25% to 85%
Storage temperature		-25 to 85°C (with no condensation or icing)
Storage humidity		25% to 85%
Operating altitude		2,000 m max.
Installation environment		Overvoltage category II, measurement category II, pollution degree 2
Electromagnetic environment		Industrial electromagnetic environment (EN/IEC 61326-1 Table 2)
Compliant standards		EN 61010-2-030, EN 61326-1, and UL 61010-1

* The KM-series CTs (the KM20-CTF or KM-NCT Series) cannot be used. Use general-purpose CTs with a secondary-side output of 1 A or 5 A.

Ratings (Connectable OMRON split-type current transformers (CTs))

Model	KM20-CTN100	KM20-CTN250	KM20-CTN500
Rated primary current	100 A	250 A	500 A
Rated secondary current	1 A	1 A	1A
Rated frequency	50/60 Hz
Insulation resistance	100 MΩ min. (at 500 VDC) (Between through hole and output lead)
Dielectric strength	2000V AC 1min. (Between through hole and output lead)
Cable length	1 m
Through-hole	24 diameter		36 diameter
Weight	Approx. 210 g		Approx. 500 g
Operating temperature and humidity ranges	-20 to 55 °C, 85% max. relative humidity (with no condensation)
Storage temperature and humidity ranges	-30 to 90 °C, 85% max. relative humidity (with no condensation)

Performance (Power Monitor)

Model		KM-N3-FLK
Measured items		Total power consumption (active, regenerative, and reactive), power (active and reactive), current, voltage, power factor, and frequency
Meas- urement specifi- cations	Active power	0.5% (IEC 62053-22 class 0.5S *
	Reactive power	2% (IEC 62053-23 class 2) *
	Sampling cycle	80 ms for 50 Hz and 66.7 ms for 60 Hz
Insulation resistance		(1) Between all electrical circuits and the case: 20 MΩ min. (at 500 VDC) (2) Between all power supply and voltage inputs and all communications and pulse output terminals: 20 MΩ max. (at 500 VDC)
Dielectric strength		(1) Between all electrical circuits and the case: 1,400 VAC for 1 min (2) Between all voltage and current inputs and all communications and pulse output terminals: 2,200 VAC for 1 min
Vibration resistance		Single amplitude: 0.1 mm, Acceleration: 15 m/s², Frequency: 10 to 150 Hz, 10 sweeps for 8 min each along three axes
Shock resistance		150 m/s², 3 times each in 6 directions (up/down, left/right, forward/backward)
Indications and operation method		LCD indications and operation buttons
Weight		Approx. 350 g (Power Monitor only)
Degree of protection		Front: IP65, Rear case: IP20, Terminal: IP00
Pulse output	Number of outputs	Number of outputs: 4 (photoMOS relay outputs) Used for the total power consumption pulse output.
	Output capacity	50 mA at 40 VDC ON residual voltage: 1.5 V max. (for output current of 50 mA) OFF leakage current: 0.1 mA max.
	Output unit	Output unit: 1, 10, 100, 1k, 5k, 10k, 50k, or 100k (wh) Pulse ON time: 500 ms (Cannot be changed.)
Commu- nications interface	Communications method	RS-485 (2-wire half-duplex with start-stop synchronization)
	Communications protocol	Modbus (RTU): Binary. CompoWay/F: ASCII
	Baud rate	1.2, 2.4, 4.8, 9.6, 19.2, or 38.4 kbps
	Data length	Data length: 7 or 8 bits Stop bits: 1 or 2 bits Vertical parity: Even, odd, or none
	Maximum transmission distance	1,200 m
	Maximum number of connected Power Monitors	Modbus: 99, CompoWay/F: 31 If you measure more than one circuit with one Power Monitor, the number of circuits is treated as the number of connected Power Monitors.
Dimensions (H×W×D)		96 × 96 × 64 mm (excluding protrusions)
Installation method		On-panel installation
Accessories		Instruction Manual and Compliance Sheet, Mounting adapter and waterproof packing

* The error of the CT or VT is not included. IEC 62053 is an international standard for power metering.

Power Monitor

KM-N3-FLK

KM20-CTN100
KM20-CTN250
KM20-CTN500

Optional Products (Order Separately)

Terminal Covers

E53-COV24 (Three Covers provided.)

Waterproof Packing

Y92S-P10 (for DIN 96 × 96)

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.

Mounting Adapter

Y92F-51 (Two Adapters provided.)

One pair is provided with the KM-N3.
Order this Adapter separately if it becomes lost or damaged.

TITLE	DOCUMENT TYPE	SIZE
KM-N2 / KM-N3	Catalog	8245 KB
Innovation in control panel building	Catalog	13592 KB
KM-N3-FLK On-Panel Power Monitor	Manual	5226 KB
KM-N3-FLK On-Panel Power Monitor	Manual	5038 KB
KM-N3-FLK (Names of the parts and their functions)	Manual	8452 KB