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KM1

Multi-circuit Smart Power Monitor

KM1

New Ways to Uncover Power Savings. Measure Multiple Distribution Panels at the Same Time.

about this Product Family

Ratings

Model Master Unit Slave Unit
KM1-PMU2A-FLK
(Dual Power
Systems)
KM1-PMU1A-FLK
(Single Power
System)
KM1-EMU8A-FLK
(Pulses/
Temperatures)
KE1-CTD8E
(CT Extension
Unit)
Applicable phase wiring
method
Single-phase two-
wire, single-phase
threewire, and
three-phase three-
wire
Single-phase two-
wire, single-phase
three-wire, three-
phase three-wire,
and three-phase
four-wire
- Single-phase two-
wire, single-phase
three-wire, three-
phase three-wire,
and three-phase
four-wire
Maximum number of CT
connections
4 3 - 8
Selectable types of CT
capacities
2 types 1 type - Two types per Slave
Unit
Power
supply
Rated power
supply voltage
100 to 240 VAC, 50/60 Hz -
Allowable supply
voltage range
85% to 110% of rated power supply voltage -
Power supply
allowable
frequency range
45 to 65 Hz -
Power
consumption
Standalone: 10 VA max.,
Maximum expansion: 14 VA max.
10 VA max. -
Input Rated input
voltage
100 to 480 VAC
(single-phase, 2-
wire): Line voltage
100/200 VAC
(single-phase, 3-
wire): Phase
voltage/line voltage
100 to 480 VAC
(3-phase, 3-wire):
Line voltage
100 to 480 VAC
(single-phase, 2-
wire): Line voltage
100/200 VAC
(single-phase,
3-wire): Phase
voltage/line voltage
100 to 480 VAC
(3-phase, 3-wire):
Line voltage
58 to 277 VAC
(3-phase, 4-wire):
Phase voltage
-
Rated input
current (CT)
(5, 50, 100, 200, 400, or 600 A) - (5, 50, 100, 200, 400,
or 600 A)
Rated input
power
With 5-A CT: 4 kW
With 50-A CT: 40 kW
With 100-A CT: 80 kW
With 200-A CT: 160 kW
With 400-A CT: 320 kW
With 600-A CT: 480 kW
-
Rated input
frequency
50/60 Hz -
Allowable input
frequency range
45 to 65 Hz -
Allowable input
voltage
110% of rated input voltage (continuous) -
Allowable input
current
120% of rated input current (continuous) - 120% of rated input
current (continuous)
Rated input load Voltage input: 0.5 VA max. (excluding power
supply)
Current input: 0.5 VA max. (for each input)
- Current input: 0.5 VA
max. (for each input)
Clock Clock setting 2012 to 2099 (Adjusted for leap years during this period.) -
Clock accuracy ±1.5 min./month (at 23°C) -
Clock backup
period
Seven-day backup with an electric double-layer capacitor (after
being powered for at least 24 hours and when at 23°C when the
power is turned OFF)
-
Ambient operating
temperature
-10 to 55°C (with no condensation or icing)
Storage humidity -25 to 65°C (with no condensation or icing)
Ambient operating
humidity
25% to 85%
Storage humidity 25% to 85%
Altitude 2,000 m max.
Installation environment Overvoltage category II, pollution degree 2, measurement category II
Compliant standards EN/IEC 61010-2-030 and EN/IEC 31626-1 Industrial electromagnetic environment

Performance

Model Master Unit Slave Unit
KM1-PMU2A-FLK
(Dual Power
Systems)
KM1-PMU1A-FLK
(Single Power
System)
KM1-EMU8A-FLK
(Pulses/
Temperatures)
KE1-CTD8E
(CT Extension Unit)
Accu-
racy
*1
Voltage ±1.0% FS, ±1 digit; or, ±2.0% FS, ±1 digit
for voltage across Vtr under the same
conditions
-
Current ±1.0% FS, ±1 digit
However, the accuracy is ±2.0% FS, ±1
digit for the phase-S current for a three-
phase, three-wire circuit and the phase-
N current for a singlephase, three-wire
circuit under the same conditions.
- ±1.0% FS, ±1 digit
However, the accuracy
is ±2.0% FS, ±1 digit
for the phase-S current
for a three-phase,
three-wire circuit and
the phase-N current for
a single-phase, three-
wire circuit under the
same conditions.
Power (active
power and
reactive power)
Active power and reactive power
±2.0% FS, ±1 digit (Power factor = 1)
- Active power and
reactive power
±2.0% FS, ±1 digit
(Power factor = 1)
Frequency ±0.3 Hz ±1 digit -
Power factor
*2
±5.0% FS at an ambient temperature of
23°C, rated input, rated frequency, and a
power factor of 0.5 to 1 to 0.5
- ±5.0% FS at an
ambient temperature
of 23°C, rated input,
rated frequency, and a
power factor of 0.5 to
1 to 0.5
Temperature - ±5°C two hours
after the power
supply is turned ON
(after performing
any adjustments for
the ambient
temperature)
-
Temperature infl uence ±1.0% FS (percentage of the
measurement value at an ambient
temperature of 23°C, rated input, rated
frequency, and a power factor of 1 in the
operating temperature range)
±1.0% FS
(percentage of the
measurement value
at an ambient
temperature of 23°C
in the operating
temperature range)
±1.0% FS (percentage
of the measurement
value at an ambient
temperature of 23°C,
rated input, rated
frequency, and a power
factor of 1 in the
operating temperature
range)
Infl uence of frequency ±1.0% FS (percentage of the
measurement value at an ambient
temperature of 23°C, rated input, rated
frequency, and a power factor of 1 in the
rated frequency ±5 Hz range)
- ±1.0% FS (percentage
of the measurement
value at an ambient
temperature of 23°C,
rated input, rated
frequency, and a power
factor of 1 in the rated
frequency ±5 Hz range)
Infl uence of harmonics ±0.5% FS (at ambient temperature of
23°C, error for superimposed 2nd, 3rd,
5th, 7th, 9th, 11th, and 13th harmonics
for a content percentage of 30% for
current and 5% for voltage of the basic
wave)
- ±0.5% FS (at ambient
temperature of 23°C,
error for superimposed
2nd, 3rd, 5th, 7th, 9th,
11th, and 13th
harmonics for a content
percentage of 30% for
current and 5% for
voltage of the basic
wave)
Low-cut current set value 0.1% to 19.9% of rated input in 0.1%
increments
- 0.1% to 19.9% of rated
input in 0.1%
increments
Sampling cycle 100 ms for measurement voltage at 50
Hz and 83.3 ms for measurement
voltage at 60 Hz
100 ms 100 ms for
measurement voltage
at 50 Hz and 83.3 ms
for measurement
voltage at 60 Hz
Insulation resistance Insulation resistance: 20 M (at 500 VDC)
Dielectric strength All models: Locations to which 2,000 V was applied for one minute: Between all terminals
and case KM1-PMU1A-FLK:
Between the power supply terminals and RS-485/USB/transistor output
Between the power supply terminals and current/voltage input
Between current/voltage input and RS-485/USB/transistor outputs
KM1-PMU2A-FLK:
Between the power supply terminals and RS-485/USB/transistor outputs
Between the power supply terminals and current/voltage input
Between current/voltage inputs and RS-485/USB/transistor outputs
Between current/voltage input 1 and voltage input 2
KM1-EMU8A-FLK:
Between power supply terminals, temperature input, and RS-485/USB/transistor outputs
KE1-CTD8E:
Between current inputs and USB/relay outputs
Vibration resistance Single-amplitude: 0.35 mm, Acceleration: 50 m/s2
Vibration: 10 to 55 Hz, 10 sweeps of 5 minutes each along 3 axes
Shock resistance 150 m/s2, 3 times each in 6 directions (up/down, left/right, forward/backward)
Weight 230 g
Memory backup No. of writes to non-volatile memory: 1,000,000 times
Event
inputs
Number of
inputs
- 7 -
No-voltage
inputs
- ON current:
15 mA max.,
ON residual voltage:
8 V max.,
OFF leakage current:
1.5 mA max.
-
Voltage input - High level:
4.75 to 30 VDC
Low level: 0 to 2 VDC
Input impedance:
Approx. 2 kΩ
-
Minimum input
time
- 5ms -
Tem-
perature
inputs
Thermisto
inputs
- 1 -
Applicable
thermistor
- E52-THE5A
Color code (blue):
-50 to 50°C
Color code (black):
0 to 100°C
-
Combinations Capable of supporting 7 event inputs
and 1 temperature input when linked
with the KM1-EMU8A-FLK.
-
Tran-
sistor
outputs
Number of
outputs
Three open collectors (OUT1, OUT2, OUT3) and common -
Output
capacity
30 VDC, 30 mA -
ON residual
voltage
1.2 V max. -
OFF leakage
current
100 μA max. -
Total power
consumption
pulse output
Outputs one pulse when the power consumption reaches the
set pulse output unit
(1, 10, 100, 1k, 2k, 5k, 10k, 20k, 50k, 100k W/h).
-
Alarm output Outputs an alarm based on the set alarm output threshold. -
Recovery
method
Automatic recovery only -
Relay
output
Number of
outputs
- One NO contact (OUT1)
Rated load - Resistance load, 125
VAC, 3 A; 30 VDC, 3 A
Mechanical life
expectancy
- 5,000,000 times min.
Electrical life
expectancy
- 200,000 times min.
(rated load switching
frequency: 1,800
times/h)
Failure rate P
level
- 5 VDC, 10 mA (at a
switching frequency of
120 times/min)
Alarm output - Turns output ON or
OFF based on the alarm
set value.
Recovery
method
- Automatic recovery only
RS-485 Protocols Communications protocol setting: Compoway/F or Modbus
Sync method Start-stop
Node number
setting
CompoWay/F: 0 to 99, Modbus:1 to 99
When a switch operation is performed to set the protocol to Modbus when the node
number is set to 0, the node number is automatically changed to 1.
Baud rate 9,600 bps, 19,200 bps, or 38,400 bps
Transmission
code
CompoWay/F: ASCII, Modbus: Binary
Data length *3 CompoWay/F: 7 bits, 8 bits; Modbus: 8 bits
Stop bits *3 CompoWay/F: 1 bits or 2 bits; Modbus: 1 bit with priority, 2 bits without priority
Parity Even, odd, or none
Maximum
transmission
distance
500 m
Maximum
number of
nodes
CompoWay/F: 31, Modbus: 99
Communication
items
Refer to the relevant communications specifi cations manuals.
USB USB 1.1 compatible
Memory retention for
power interruptions
Parameter data
Total power consumption (Saved to internal memory every 5 minutes.)
Number of link connector
insertions/removals
25 times

*1. Based on JISC1111, without special CT error, at ambient temperature of 23° C, rated input, and rated frequency.
        Applicable to 2nd, 3rd, 5th, 7th, 9th, 11th, and 13th harmonics.
*2. Power factor formula: Power factor = Active power/Apparent power
        3123_sp_2_1
*3. The set value may change when the protocol is changed to Modbus. Check the set values if you change the DIP
       switch settings.

Special CTs
Current Transformer (CT) Cable

Confi guration Installed separately In-panel
(penetration
type)
Model KM20-
CTF-5A
KM20-
CTF-50A
KM20-
CTF-100A
KM20-
CTF-200A
KM20-
CTF-400A
KM20-
CTF-600A
KM20-CTB-
5A/50A
Rated primary current 5 A 50 A 100 A 200 A 400 A 600 A 5 A/50 A
Rated secondary
current
1.67 mA 1.67 mA 33.3 mA 66.7 mA 66.7 mA 66.7 mA 1.67 mA/
16.7 mA
Secondary winding 3,000 turns 6,000 turns 9,000 turns 3,000 turns
Applicable frequency 10 Hz to 5 kHz
Insulation resistance Between output terminals and case: 50 MΩ min. (at 500 VDC)
Dielectric strength Between output terminals and case: 2,000 VAC for 1 minute
Protective element 7.5-V clamp element
Allowable number of
connections/
disconnections
100 times
Applicable wire
diameter *
7.9 mm
max.
9.5 mm
max.
14.5 mm
max.
24.0 mm
max.
35.5 mm max. 8.4 mm max.
Operating temperature
and humidity ranges
-20 to 60°C, 85% max. (with no condensation)
Storage temperature
and humidity ranges
-30 to 65°C, 85% max. (with no condensation)

Note: Operate the Special CTs at a low voltage of 600 V or less.
* If you use a fl at cable, select the cable based on the dimensions of the CT.

Current Transformer (CT) Cable

Model KM20-CTF-CB3
Cable length 3 m

Note: Either use the CT Cable specifi ed by OMRON or use 1.25-B3A crimp terminals and AWG22 wire from J.S.T. Mfg. Co., Ltd.

Specifications

DeviceNet Communications Unit (KE1-DRT-FLK)
DeviceNet Communications Specifications

Item Specification
Communications Remote I/O communications (I/O assignment settings with simple assignment settings or the
Configurator)
Message communications
Connection
configuration
Can be a combination of multidrops and T-branching (for both main and branch lines).
Baud rate 500, 250, or 125 kbps (automatically detected)
Rated primary current 5 dedicated lines (2 signal lines, 2 power lines, and 1 shield)
Communications
distance
Baud rate Maximum network length Branch line length Total for all branch lines
500 kbps 100 m max. (100 m max.) 6 m max. 39 m max.
250 kbps 250 m max. (100 m max.) 6 m max. 78 m max.
125 kbps 500 m max. (100 m max.) 6 m max. 156 m max.
Numbers in parentheses are the lengths for thin cable.