OMRON KM-N3-FLK Power Monitor

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: 1,400 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