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KM-N2

Caratteristiche

Power monitor compatto e multicircuito per installazione retroquadro

  • Oltre 20 anni di esperienza nella tecnologia di monitoraggio dell’alimentazione
  • Compatto con capacità multicircuito (fino a 4 circuiti collegati a un modulo)
  • Soluzione a tutti i problemi di progettazione, installazione, cablaggio e messa in esercizio con un solo modello
  • IEC 62053-22 classe di precisione 0,5S
  • Tecnologia Push-In Plus per facilità di cablaggio
  • LED e allarme acustico automatici in caso di cablaggio errato
  • Display LCD bianco di grandi dimensioni e di facile lettura
  • Montaggio su guida DIN
  • Misurazione dell’alimentazione bidirezionale
Caratteristiche ed info per ordinare

Ordering information

Applicable circuits and rated input voltage

Power supply voltage

Dimensions (W×H×D)

Communications

Order code

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:
100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)
Three-phase, 4-wire:
100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)

Rated input voltage 85 to 115%

90 × 65 × 90 mm

RS-485, Modbus (RTU) or
CompoWay/F

KM-N2-FLK

Specifications

Ratings

Applicable circuits

Single-phase two-wire, single-phase three-wire, three-phase three-wire, and three-phase four-wire

Maximum number of measured circuits1

Single-phase two-wire: 4 circuits, single-phase three-wire or three-phase three-wire: 2 circuits, three-phase four-wire: 1 circuit

Rated input voltages (power supply 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: 100 to 277 VAC (L-N) or 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 and input voltage range

85% to 115% of rated power supply voltage

Power consumption

7 VA max.

Input current (CT2 primary-side current)2

General-purpose CT: 1 A or 5 A

Rated load: 0.5 VA min.

Rated input frequency

50/60 Hz

Allowable input current

6 A max.

Ambient operating temperature

−25 to 55°C (with no condensation or icing)

Storage temperature

−25 to 85°C (with no condensation or icing)

Ambient and storage humidity

25% to 85%

Operating altitude

2,000 m max.

Installation environment

Overvoltage category II, pollution degree 2, measurement category II

Electromagnetic environment

Industrial electromagnetic environment (EN/IEC 61326-1 Table 2)

Compliant standards

EN 61010-2-030, EN 61326-1, and UL 61010-1

Performance

Measurement specifications

Active power

IEC 62053-22 class 0.5S (Accuracy ±0.5% F.S. ±1 digit)3

Reactive power

IEC 62053-23 class 2 (Accuracy ±2% F.S. ±1 digit)1

Sampling cycle

80 ms for 50 Hz and 66.7 ms for 60 Hz

Measured items

Energy consumption (active, regenerative, and reactive), power (active and reactive), current, voltage, power factor, and frequency

Insulation resistance

  • Between all electrical circuits and the case: 20 MΩ min. (at 500 VDC)
  • Between all power supply and voltage inputs and all communications and pulse output terminals:: 20 MΩ max. (at 500 VDC)

Dielectric strength

  • Between all electrical circuits and the case: 2,200 VAC for 1 min
  • 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/s 2 , Frequency: 10 to 150 Hz, 10 sweeps for 8 min each along three axes

Shock resistance

150 m/s 2 , 3 times each in 6 directions (up/down, left/right, forward/backward)

Weight

Approx. 350 g (Power Monitor only)

Degree of protection

IP20

Installation method

DIN Rail mounting

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

1, 10, 100, 1k, 5k, 10k, 50k, or 100k (wh)
Pulse ON time: 500 ms (Cannot be changed.)

Communications 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 m1

Maximum number of connected Power Monitors

Modbus: 99, CompoWay/F: 31


1. A CT with a different capacity can be specified for each circuit.

2. 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.

3. The error of the CT or VT is not included.

1. A CT with a different capacity can be specified for each circuit.

2. 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.

3. The error of the CT or VT is not included.

Ordering information

Power monitor

Applicable circuits and rated input voltage

Power supply voltage

Dimensions (W×H×D)

Communications

Order code

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:
100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)
Three-phase, 4-wire:
100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)

Same as measured circuits:

100 to 277 VAC (L-N)

173 to 480 VAC (L-L)

90 × 65 × 90 mm

RS-485 communications,
pulse output

KM-N2-FLK

Note: To use a commercially available current transformer, use a CT with a secondary current rating of 1 A or 5 A, and a rated load of at least 1.0 VA.

Connectable OMRON split-type Current Transformers (CTs)

Rated primary current

Rated secondary current

Order code

100 A

1 A

KM20-CTN100

250 A

KM20-CTN250

500 A

KM20-CTN500

Note: The CT cables connected to the CT have the following recommended characteristics:
- cross section 0.75 mm² = AWG18
- 2C (number of internal wires is two)
- 1 m long maximum.
The CT cables are not provided by Omron

Specifications

Ratings (Power monitor)

Item

KM-N2-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 consumption

7 VA max.

Input

Rated input voltages
(power supply 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 1

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

Ratings (Connectable OMRON Split-type Current Transformers (CTs))

Item

KM20-CTN100

KM20-CTN250

KM20-CTN500

Rated primary current

100 A

250 A

500 A

Rated secondary current

1 A

1 A

1 A

Rated frequency

50/60 Hz

Insulation resistance

100 MΩ min. (at 500 VDC) (Between through hole and output lead)

Dielectric strength

2,000V 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)

Item

KM-N2-FLK

Measured items

Total power consumption (active, regenerative, and reactive), power (active and reactive), current, voltage, power factor, and frequency

Measurement specifications

Active power

0.5% (IEC 62053-22 class 0.5S) 2

Reactive power

2% (IEC 62053-23 class 2) 1

Sampling cycle

80 ms for 50 Hz and 66.7 ms for 60 Hz

Insulation resistance

  • Between all electrical circuits and the case: 20 MΩ min. (at 500 VDC)
  • Between all power supply and voltage inputs and all communications and pulse output terminals: 20 MΩ max. (at 500 VDC)

Dielectric strength

 

  • Between all electrical circuits and the case: 2,200 VAC for 1 min
  • 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

LED/LCD indications and operation buttons

Weight

Approx. 350 g (Power Monitor only)

Degree of protection

IP20

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.)

Communications 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)

90 × 90 × 65 mm (excluding protrusions)

Installation method

DIN Rail mounting

Accessories

Instruction Manual and Compliance Sheet


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.

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

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.

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

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