KM50-C1-FLK
Smart Power Monitor
KM50-C1-FLK
CSM_KM50-C1-FLK_DS_E_1_2
• Low Cost Power Monitor for On-panel Mounting and Display
• Assists Energy-saving Analysis
• Power and current can be measured simultaneously.
Measurement of flow rates with a pulse conversion function.
• Simple temperature measurements with Temperature Sensor included in the Unit.
• High-precision Measurements
• Measurement of generated power (regenerative power), leading reactive power, lagging
reactive power, and consumed power.
• Power measurements on the primary side of inverters, which are widely used to save energy.
• Automatic range switching for accurate measurement of standby and stopped power.
• Energy-saving Functions
• Conversion to monetary cost.
• Alarm outputs can be selected for active power, reactive power, regenerative power, current,
voltage, or power factor.
• The Power Monitor can log measurement data and supports Modbus communications.
For the most recent information on models that
have been certified for safety standards, refer to
your OMRON website.
• Installation and Settings
• Simple measurements without voltage wiring.
• Incorrect voltage wiring detection.
Note: Not valid for billing applications.
Refer to “Safety Precautions” on page 9.
Features
■ Functions That Support Energy-saving
■ Energy Management with High-precision
● Pulse Measurement and Conversion
● Total Regenerated Energy Measurement
Analysis
1. Flow rates can be measured at the same time as power by
inputting flow pulses. (Two inputs are supported.)
To support energy-saving analysis, power consumption can be
compared with the flow rate of air, gas, or other fluids with a single
Unit.
2. Pulse inputs can be counted, or used to measure the ON time.
The consumption rate of a device can be measured by dividing the
power consumption with the measured number of operations or
operation time.
Pulse Input Count Measurement
Measurements
In addition to the consumed energy (total regenerative power
consumption), generated power (total regenerative energy) can also
be measured.
A single Power Monitor can measure equipment that effectively uses
power generated by reverse motor rotation.
● Total Reactive Power Measurement
In addition to instantaneous reactive power, the total leading or
lagging power consumption can also be measured.
Together with peak power measurements, this function aids with
monitoring the power distribution equipment.
● Automatic Range Switching
Pulses
1
2
3
KM50-C
Pulse Input ON Time Measurement
3s
5s
● Simple Temperature Measurement
KM50 Power Monitors have a thermistor chip built onto the panel
surface for easy measurement of the panel surface temperature.
The temperature display can be offset to match the room temperature
to manage trends.
Previous product
Current consumption (kW)
10 s
KM50-C
Current consumption (kW)
Pulses
Automatic range switching enables high-accuracy
measurements even for microcurrents.
Standby and stopped power can be accurately measured.
When measured at the distribution board, the total of the distributed
values is almost the same as the base measurement.
30
0
20
40
60
80
Current (A)
±1A
100
±1A
New KM50-series Power Monitor
30
0
5
40
60
80
Current (A)
100
±75mA
±1A
For currents below approx. 5% of the rated
current, the Power Monitor automatically
changes to microcurrent measurement
mode to accurately measure microcurrents.
You can measure microcurrents of ±75 mA with a CT with a rated current
of 100 A. (Reference Value)
You can measure microcurrents of ±4 mA with a CT with a rated current
of 5 A. (Reference Value)
Note: Reference values are typical values. Actual values may vary.
● Inverter Compatibility
Measurements can be made on the primary side of an inverter.
Power consumption can be measured even after installing inverters
which are widely used to save energy. This enables you to accurately
grasp the effect obtained by introducing the inverter.
1
KM50-C1-FLK
■ Functions That Support Saving Energy
■ Functions That Support Installation and
The total power consumption can be converted to the equivalent
monetary cost.
Displaying the cost of the wasted energy can be used to support
energy-saving measures.
● Simple Measurement
● Conversion to Monetary Cost
Settings
• The simple measurement function calculates the power from a
fixed voltage and the measured current using a fixed power factor.
• This function can be used when the voltage cannot be input to the
KM50 due to onsite conditions or wiring arrangements.
• If the Simple Measurement parameter is set to ON, the fixed
voltage and fixed power factor can be set.
• The simple measurement function can be used to get an
approximate power consumption of an installed circuit without
wiring and measuring the voltage. Therefore, you must set the
voltage and power factors to appropriate levels.
• Fixed values are used for the voltage and power factor, so the
accuracy specifications do not apply.
● Alarm Output
An alarm can be output when active power exceeds a
certain limit. There are two outputs; a pulse output and an
output for alarm selection.
Alarms can also be set up for generated power (regenerative power),
current, voltage, power factor, or reactive power to assist plant
monitoring.
Active power
measurement value
Active power threshold
* Set the voltage to 100 V when performing simple measurements on
a single-phase, three-wire power supply.
● Incorrect Wiring Detection
Incorrect voltage wiring can be detected.
If any mistakes were made during installation, they are automatically
detected, reducing the time required for checking after installation.
This also reduces the risk of having to restart when a mistake is found.
Active power alarm output ON
Output
ON.
Output
ON.
Active power alarm output OFF
● Communications
● Built-in Logging Function
The total power consumption can be saved in internal
memory every 5 minutes, hour, day, or month.
Up to 99 KM50 Power Monitors can be connected using RS-485 Modbus.
The energy use of each device can be managed with minimal wiring.
Data can be saved as follows: 5-minute data for two days, 1-hour data
for eight days, 1-day data for month, and 1-month data for one year.
CompoWay/F: 31 Power Monitors
Modbus: 99 Power Monitors
Data Logging Cycle and Amounts
Terminating
resistance
RS-485
Every 5 min: 48 hours of data *1
Every hour: 25 hours of data *2
Total power consumption
Every day: 8 days of data
Transmission distance: 500 m
Every month: 13 months of data
Active power, current, voltage, and
maximum/minimum power factors
Every day: 8 days of data
*1 The data that is logged with a 5-minute cycle can be read out only
by using RS-485 communications.
Readout is not possible with key operations on the Power Monitor.
*2 Up to 48 hours of data can be read out using communications.
Ordering Information
KM50-C Smart Power Monitor
Model
Applicable circuits
Power supply
voltage
Dimensions
Communications
KM50-C1-FLK
Single-phase, 2-wire: 100 to 240 VAC
Single-phase, 3-wire: 100/200 VAC
Three-phase, 3-wire: 100 to 240 VAC
Shared with
measurement
voltage input
100 to 240 VAC
48 × 48 × 84 (H × W × D)
RS-485
CTs
Protocol
CompoWay/F: 31 nodes,
Modbus: 99 nodes (Both are
supported by the same model.)
These CTs must be used with the KM50/KM20-B40/-FLK. Do not use them with any other products.
Model
KM20-CTF-5A
Rated primary current
Rated secondary current
Installation
Special output
Installed separately
5A
KM20-CTF-50A
50 A
KM20-CTF-100A
100 A
KM20-CTF-200A
200 A
KM20-CTF-400A
400 A
KM20-CTF-600A
600 A
Note: CT Cables are not included with the CTs.
CT Cable
Model
Cable length
KM20-CTF-CB3
3m
Note: Either use the CT Cable specified by OMRON or use 1.25-B3A crimp terminals and AWG22 wire from J.S.T. Mfg. Co., Ltd.
2
KM50-C1-FLK
Mounting Brackets (for DIN Track or Magnet Mounting)
Model
Specification
KM50-OPT-ED1 *
DIN Track mounting
KM50-OPT-EM1 *
Magnet mounting
KM50-OPT-CD1
DIN Track mounting
* You can mount one KM50-E or two KM50-C Power Monitors.
Specifications
Ratings
Item
Model
KM50-C
Applicable circuit
Single-phase two-wire, single-phase three-wire, and three-phase three-wire power
Rated power supply voltage
100 to 240 VAC, 50/60 Hz
The power supply voltage and measurement voltage input are shared (terminals 6 and 7).
Allowable supply voltage range
85% to 110% of rated power supply voltage
Allowable frequency range
45 to 65 Hz
Power consumption
7 VA max.
Rated input
Rated input voltage
100 to 240 VAC (single-phase, 2-wire): Line voltage
100/200 VAC (single-phase, 3-wire):
Phase voltage/line voltage
100 to 240 VAC (3-phase, 3-wire):
Line voltage
Rated input current
5 A, 50 A, 100 A, 200 A, 400 A, or 600 A (primary current of Special CT) *
Rated frequency
50/60 Hz
Rated input power
With 5-A CT: 2 kW
With 100-A CT: 40 kW
With 400-A CT: 160 kW
Allowable input voltage
110% of rated input voltage (continuous)
Allowable input current
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)
With 50-A CT: 20 kW
With 200-A CT: 80 kW
With 600-A CT: 240 kW
Time
2010 to 2099 (Adjusted for leap year.)
Accuracy: ±1.5 min/month (at 23 °C)
Time backup period
3 days (without power supply, at 23 °C)
Ambient operating temperature
−10 to +55 °C (with no condensation or icing)
Storage temperature
−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 and measurement category: 2, Pollution level: 2
* A special output signal is output as the secondary current from the Special CT.
3
KM50-C1-FLK
Performance
Smart Power Monitor
Item
Model
Voltage
Current
Accuracy *1
Active power
Reactive power
Frequency
Power factor
KM50-C
±1.0% FS ±1 digit (at ambient temperature of 23 °C, rated input, and rated frequency).
However, the accuracy is ±2.0% FS ±1 digit for the Vtr line voltage for three-phase, three-wire power and the
Vrs line voltage for single-phase, three-wire power under the same conditions.
±1.0% FS ±1 digit (at ambient temperature of 23 °C, rated input, and rated frequency).
However, the accuracy is ±2.0% FS ±1 digit for the phase-S current for three-phase, three-wire power and the
phase-N current for single-phase, three-wire power under the same conditions.
±2.0% FS ±1 digit (at ambient temperature of 23 °C, rated input, rated frequency, and a power factor of 1)
Reactive power formula: Reactive power = v × i × sin θ
* "v" is the instantaneous voltage and "i" is the instantaneous current.
θ is the phase difference between the voltage and current.
±0.3 Hz ±1 digit (at ambient temperature of 23 °C, rated input, and rated frequency)
±5.0% FS ±1 digit (at ambient temperature of 23 °C, rated input, rated frequency, and Power factor = 0.5 to 1 to 0.5)
Power factor formula: Power factor = Active power/Apparent power
* Apparent power = √ (Active power)2 + (Reactive power)2
Temperature
Low-cut current set value
Sampling cycle
Temperature influence *1
Frequency influence *1
Influence of harmonics *1
Insulation resistance
Dielectric strength
Vibration resistance
Shock resistance
Weight
Degree of protection
Memory backup
Compliant standards
Number of inputs
Voltage input
Event inputs
No-voltage input
Minimum input time
Number of outputs
Transistor outputs
Communications
Output capacity
Alarm output delay *2
Characteristic operating
time *3
Communications method
Sync method
Unit number setting
Baud rate
Transmission code
Data length
Stop bit length
Vertical parity
Maximum transmission
distance
Maximum number of
connected Power Monitors
±5 °C two hours after the power is turned ON (after setting the offset to match the ambient environment)
0.1% to 19.9% of rated current input (in 0.1% increments)
100 ms for measurement voltage at 50 Hz and 83.3 ms for measurement voltage at 60 Hz
±1.0% FS ±1 digit (percentage of power within operating temperature range, at ambient temperature of 23 °C,
rated input, rated frequency, and power factor of 1)
±1.0% FS ±1 digit (percentage of power within rated frequency ±5 Hz, at ambient temperature of 23 °C, rated
input, and power factor of 1)
±0.5% FS ±1 digit (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)
1) Between all current and voltage inputs and all of the RS-485 terminals, OUT1, event inputs, and I/O
commons: 20 MΩ max. (at 500 VDC)
2) Between all electric circuits and the front case: 20 MΩ max. (at 500 VDC)
1) Between all current and voltage inputs and all of the RS-485 terminals, OUT1, event inputs, and I/O
commons: 2,800 VAC for 1 min
2) Between all electric circuits and the front case: 2,800 VAC for 1 min
Single amplitude: 0.35 mm, Acceleration: 50 m/s2, Frequency: 10 to 15 Hz, 10 sweeps for 8 min each along
three axes
150 m/s2, 3 times each in 6 directions (up/down, left/right, forward/backward)
Approx. 150 g (Power Monitor only)
Front panel: IP66 (when mounted to a panel), Rear case: IP20, Terminal section: IP00
EEPROM (non-volatile memory), No. of writes: 1,000,000 times
EN61010-1 (IEC61010-1), EN61326-1 (IEC61326-1), UL61010-1, CAN/CSA-C22.2 No.61010-1
Two event inputs
The common terminal is shared with the OUT1
High level: 4.75 to 30 VDC
Low level: 0 to 2 VDC
Input impedance: Approx. 2 kΩ
ON resistance: 1 kΩ max.
OFF resistance: 100 kΩ min.
ON residual voltage: 8 V max.
ON current (at 0 Ω): 10 mA max.
5 ms
One open-collector output (one total power consumption pulse output or alarm output)
The common terminal is shared with the event inputs.
30 VDC, 30 mA max.
ON residual voltage: 12 V max.
OFF leakage current: 100 μA max.
OFF delay: 0.0 to 99.9 s, ON delay: 0.0 to 99.9 s
±200 ms
RS-485 (2-wire half-duplex)
Start-stop
CompoWay/F: 0 to 99, Modbus: 1 to 99
1.2, 2.4, 4.8, 9.6, 19.2, 38.4 kbps
CompoWay/F: ASCII, Modbus: Binary
7, 8 bits
1, 2 bits
Even, odd, or none
500 m
CompoWay/F: 31, Modbus: 99
4
KM50-C1-FLK
Item
Model
KM50-C
Radiated RF Electromagnetic Field: CISPR 11 class A
Conducted Emission:
CISPR 11 class A
Electrostatic Discharge Immunity
: EN61000-4-2
Electromagnetic Field Immunity
: EN61000-4-3
Fast Transient/Burst Noise Immunity
: EN61000-4-4
Surge Immunity
: EN61000-4-5
Conducted Disturbance Immunity
: EN61000-4-6
Power Frequency Magnetic Field Immunity : EN61000-4-8
Voltage Dip and Interruption Immunity
: EN61000-4-11
EMI
EN61326-1
EMC
(Industrial electromagnetic environment)
EMS
EN61326-1
*1 The error of the Special CT is not included.
*2 There may be error in the alarm output OFF delay and ON delay due to the measurement sampling cycle.
*3 This is the error in the operating time of the alarm output (including the error in the alarm output ON/OFF delays and output terminal switch
operating time).
CTs
Item
Model
KM20-CTF-5A
KM20-CTF-50A
KM20-CTF-100A
KM20-CTF-200A
KM20-CTF-400A
5A
50 A
100 A
200 A
400 A
600 A
6,000 turns
9,000 turns
Rated primary current
Secondary winding
3,000 turns
Application frequency
10 Hz to 5 kHz
Insulation resistance
Between output terminal and external case: 50 MΩ min. (at 500 VDC)
Dielectric strength
Between output terminal and external case: 2,000 VAC for 1 min
Protective element
7.5 V clamp element
Allowable number of
connections/disconnections
KM20-CTF-600A
100 times
Inner diameter
7.9 dia. max.
9.5 dia. max.
14.5 dia. max.
24.0 dia. max.
Operating temperature and
humidity range
−20 to +60 °C 85% (with no condensation)
Storage temperature and
humidity range
−30 to +65 °C 85% (with no condensation)
35.5 dia. max.
* If you use a flat cable, select the cable based on the dimensions of the CT.
CT Cable
Model
KM20-CTF-CB3
Cable length
3m
Note: Either use the CT Cable specified by OMRON or use 1.25-B3A crimp terminals and AWG22
wire from J.S.T. Mfg. Co., Ltd.
Part Names and Functions
KM50-C
Display Functions
1) Display No. 1
The measured value or set data is displayed here.
KM50-C
2) Display No. 2
P
Temperature unit
Operation indicators
UP Key
Display No. 1
OUT1 STOP
UP
SHIFT Key
SHIFT
Display No. 2
MODE
ENTER
ENTER Key
MODE Key
The unit of the measured or set data, or the parameter name is
displayed here.
3) Operation Indicators
• OUT1:Turns ON according to output that is set for terminal OUT1.
• STOP:Lights if the power supply is turned ON when the backup
power supply for the time data has expired while power was
interrupted.
The time measurement function will be stopped in this state.
This indicator will turn OFF when the time data is set.
Measurement data cannot be logged while this indicator is
lit.
•
(key indicator): Lit while the settings are protected.
4) Temperature unit
If Celsius is set as the temperature unit, C will be displayed. If
Fahrenheit is set, F will be displayed.
5
KM50-C1-FLK
Connection Diagrams, Terminal Arrangement, and Communications Connections
Connection Diagrams
Terminal Arrangement
Top
L
N
k
11 B (+)
1S 1
6
CT RS-485
12 A (−)
1L 2
OUT1 13
DO NOT USE 3
DO NOT USE 4
14
*
*
COM
15 EV1
P1
7
3
13
8
4
14
9
5
15
10
Terminal name
Terminal
No.
Terminal
No.
Terminal name
Terminal name
1
CT1S
11
RS-485 B (+)
6
P1 voltage
2
CT1L
12
RS-485 A (−)
7
P2 voltage
3
CT3S
13
OUT1
8
P3 voltage
4
CT3L
14
I/O common
9
DO NOT USE
5
Event input 2
15
Event input 1
10
DO NOT USE
* To use the Power Monitor in Simple Measurement Mode, apply a
voltage of 100 VAC between terminals 6 and 7.
9 DO NOT USE
Communications Connections Diagram
1S 1
11 B (+)
6
12 A (−)
7
RS-485
1L 2
OUT1 13
8
CT2
3L 4
14
*
COM
15 EV1
P1
P2
Power supply (K)
(Single-phase, 3-wire)
R R
S N
T S
(Three-phase, 3-wire)
Load (L)
12
Terminal
No.
10 DO NOT USE
k
*
2
P2
8 DO NOT USE
k
EV2 5
6
7
* Voltage/No-voltage.
3S 3
11
Bottom
Single-phase, Two-wire Connections
CT1
1
• To avoid the influence of noise, route the RS-485 communications cable separately from
the power lines.
• Use wires with a thickness of AWG24 (0.205 mm2) to AWG14 (2.081 mm2).
(The stripping length is 5 to 6 mm.)
• Do not ground the RS-485 communications cable. Doing so may result in malfunction.
• Connect terminating resistance (120 Ω (1/2 W)) to the positive and negative RS-485
lines at the host device and the last device (normally the KM50). To connect terminating
resistance to the host device, check the product instructions for the host device.
Maximum transmission distance: 500 m
P3
9 DO NOT USE
10 DO NOT USE
* Voltage/Non-voltage.
Single-phase, Three-wire or
Three-phase, Three-wire Connections
Note: 1. Do not ground the Special CTs. Failure
may occur.
2. Use only the Special CTs. Failure may
occur.
Host device
EV2 5
Power supply (K)
Load (L)
Smart Power Monitor
Terminating resistance
A (-)
B (+)
B (+) 11
B (+) 11
B (+) 11
A (-) 12
A (- )
A (-) 12
12
KM50-C
KM50-C
KM50-C
1
2
Last device
Terminating resistance
CT Connection Diagram
• One Special CT is required to measure single-phase, two-wire
power. Two Special CTs are required to measure single-phase,
three-wire power or three-phase, three-wire power.
• All the Special CTs connected to one KM50-C Power Monitor must
have the same ratings.
• Make sure that the ratings of the Special CTs and the Special CT
setting in the KM50-C Power Monitor are the same.
• Check the directions of the power supply (K) and load (L) before
making the connections.
Correct measurements will not be possible if they are connected in
the wrong directions.
• Release the locking hook and clamp the Special CT on the line. Do
this for each phase.
Then, press the hook firmly until you hear it lock into place.
• Make sure that the terminal cover on the secondary side of the CT
is closed securely.
• The CT does not have
Load (L)
polarity. Correctly wire the K
terminal on the CT to the 1S
or 3S terminal on the KM50C and wire with L terminal on Locking
Power supply
hook
(K)
the CT to the 1L or 3L
terminal on the KM50-C.
Used to secure the
CT with a band
• Use the KM20-CTF-CB3 CT
Cable (3 m) for the CT.
CT secondary side
terminal cover
Connect the end with
shrinking tubes to the CT.
• Do not ground the CT. Doing so may result in malfunction.
• Always use a covered wire with basic insulation of at least 600 V
for the primary wire on which the CT is clamped. If you clamp it to
a bus bar or other conductive part, cover it with an insulating
material or otherwise ensure the minimum basic insulation.
L
K
6
KM50-C1-FLK
Main Functions
Total Power Consumption Pulse Output
Event Inputs
To use total power consumption pulse outputs, connect terminals 13
and 14 (the terminals that were set in the output terminal settings).
To use event inputs, connect terminals 14 and 15 and terminals 5 and
14.
13
15
OUT1
15
Event Input 1
Event Input 1
14
14
14
Event Input 2
The pulse output cycle can be found with the following formula.
Pulse output cycle [s] = 3,600 [s]/Power [W]/Pulse output unit [W•h]
Example:
If the input power is 200 [kW] and the pulse output unit is set to 10
k [W•h] for a three-phase, three-wire circuit, the output pulse cycle
will be 3,600 [s]/200 k [W]/10 k [W•h] = 180 [s]. If an input power of
10 k [W] continues for one hour (3,600 s), the total power
consumption will be 10 k [W•h].
If the input power is 200 k [W] and the pulse output unit is set to 10
k [W•h], 200 k [W]/10 k [W], or 20 pulses will be output. The cycle
will therefore be 3,600 [s]/20 pulses, or 180 [s].
As shown in the following figure, one pulse will be output (i.e., the
terminal signal will turn ON) every 180 seconds.
Power supply
0.5 s
ON
Pulse output
1
2
3
20
OFF
180 s
180 s
1h
If the cycle becomes shorter than the pulse width or if the output must
turn ON immediately after turning OFF, an OFF time of 100 ms will be
maintained.
If the OFF time is too short, the PLC or other host may not be able to
count the pulses correctly due to the program scan time. Be sure to
set a suitable pulse output unit.
5
No-voltage input
Voltage input
The inputs can be set separately to normally open or normally closed.
The start and stop times for measurement can also be set.
The following values can be measured using the event inputs.
• Specific Power Consumption
The power consumption calculation function counts the number of
times that the event inputs turn ON and calculate the amount of
power consumption per count. The total of the number of ON
signals of event input 1 and event input 2 is used as the input.
• Pulse Input ON Time Measurement
The total time that one or both of the event inputs are ON is
calculated for one day and displayed.
The ON time is measured for an OR of the event input 1 and event
input 2 signals.
Either of the following input modes can be set.
• Normally Open
The event input will be considered valid when it is ON and invalid
when it is OFF.
• Normally Closed
The event input will be considered invalid when it is ON and valid
when it is OFF.
A time chart for a normally open setting is shown below.
Event Input 1
To use alarm outputs, connect terminals 13 and 14 (the terminals that
were set in the output terminal settings).
Event Input 2
Judgment
OUT1
5
The ON and OFF criteria may be based on the total count of the two
inputs, or an OR of the two inputs.
Input count: Used for the specific power consumption.
OR:
The pulse input ON time is measured.
Alarm Outputs
13
Event Input 2
OFF
ON
OFF
ON
OFF
ON
OFF
A time chart for a normally closed setting is shown below.
14
Event Input 1
The alarm turns ON if the measured value exceeds the upper limit
threshold or falls below the lower limit threshold for the alarm.
If the alarm output is ON, it will remain ON until the measurement
value goes below or above the hysteresis range.
The OFF delay, which holds the output ON for a set time after the
alarm criteria turns OFF, and the ON delay, which holds the output
OFF for a set time after the alarm criteria turns ON, can also be set.
When there is an alarm, the OUT 1 operation indicator will light, and
the present measurement value will alternate with an alarm output
display.
However, the error display is given priority if an E-S1 to E-S4 error
occurs.
Note: 1. Alarms are output when the threshold and hysteresis
criteria is met, and the time set for the OFF delay or ON
delay has passed.
2. If the upper limit threshold of the alarm is set to the
maximum value, the upper limit alarm function will be
disabled. If the lower limit threshold is set to the minimum
value, the lower limit alarm function will be disabled.
Event Input 2
Judgment
ON
OFF
ON
Measurement Log
Measurement logs can be checked.
Total power consumption (for the past 13 months, 8 days, or 25
hours), active power, current, voltage, power factor (maximum and
minimum for the past 8 days), reactive power (maximum and
minimum of the day), pulse input count, power consumption rate,
pulse input ON time (for the last 8 days).
Low-cut Function
When the current is less than the low-cut value (0.1% to 19.9% of the
rating), this function forces the current measurement to zero.
This way, current (power) generated due to induced noise in a no-load
state can be eliminated.
Low currents are detected using an AND on the phases connected to
the CTs.
* Related parameter: 04.cut
7
KM50-C1-FLK
Simple Measurements
Total Regenerative and Reactive Power
If voltage cannot be input due to site conditions, a user-specified
voltage and power factor can be set to determine the approximate
power level.
* Fixed values are used for the voltage and power factor, so the
accuracy specifications do not apply.
* The frequency cannot be measured. It is fixed at 50 Hz.
* Related parameter: 08.smp
The total regenerative power, leading reactive power, lagging reactive
power, and accumulative reactive power can be calculated.
* Total reactive power: the sum of the absolute values of leading and
lagging reactive powers.
* One item out of the four can be logged every five minutes.
* Related parameter: 60.i.sl
Calculated CO2
The measured power can be converted to CO2 and displayed.
The conversion coefficient depends on the region. Check on the web
site of the power company for the applicable coefficient.
* Related parameter: 10.co2
Conversion to Monetary Value
The measured power can be converted to the monetary cost and
displayed.
* Set the conversion factor according to the currency.
* The user-set currency can be displayed on display No. 2.
* Related parameter: 11.chg
Pulse Conversion
The measured pulse input count can be displayed as a pulse
converted value.
* Set a conversion coefficient according to what you want to display
as the pulse converted value.
* Any user-set unit can be displayed on display No. 2.
* Related parameter: 12.cv1, 13.cv2
Automatic Rotation
This function automatically changes the measurement mode
parameters.
* The interval at which the parameters change can be set.
* Related parameter: 61.rtt
Measurement Parameter Display
Selection
The display of each measurement parameter can be set ON or OFF.
* Related parameter: 62.d.sl
Energy-saving Mode
The display is turned OFF whenever there is no key operation.
* The time it takes until the display is turned OFF can be specified.
* Related parameter: 63.dsp
Incorrect Voltage Wiring Detection
Incorrect voltage input wiring is detected.
If the wiring is not correct, “e-s4” is displayed.
* Related parameter: 64.v-e
Specific Power Consumption Management
Simple Temperature Measurements
The takt power of the production line can be measured in kW•h/pulse.
If the number of manufactured items is input to the Power Monitor as
event input pulses, the takt power consumption can be calculated
from the total power consumption and displayed for the specified
period (1 day maximum).
* Related parameter:
30.eis, 31.pn1, 32.pn2, 33.in1, 34.in2, 35.stc, 36.etc
Temperature measurement is simplified.
* Celsius or Fahrenheit can be selected.
* Related parameter: 65.d-u
Wiring Precautions
• Wire signal lines and power lines separately to prevent the
influences of noise.
• Use twisted-pair cables with wires of AWG24 to AWG14 (crosssectional areas of 0.205 to 2.081 mm2). (Use a stripping length of
5 to 6 mm.)
• Use the Special CT Cable (KM20-CTF-CB3, 3 m) to connect
Special CTs.
Connect the Special CT to the end with the shrinking tubes.
• Do not ground the Special CTs or the RS-485 signal line. Failure
may occur.
• Use crimp terminals to wire the terminals.
• Use wires and crimping tools that are suitable for the crimp
terminals.
• If more than one crimp terminal is connected to the same terminal,
it may not be possible to tighten the screw sufficiently. To connect
more than one wire to the same terminal, connect all of the wires
to one crimp terminal.
• Tightening the terminal screws to a torque of 0.69 and 0.88 N•m.
• Use the following shape of M3.5 crimp terminals.
7.2 mm max.
7.2 mm max.
• Do not remove the terminal blocks. Doing so may cause failure or
malfunction.
• To extend the distance between a CT and the Unit, we recommend
that you combine a commercial CT and a Special CT.
KM20-CTF-5A
KM2
0-CT
F・・・
LOT
・・・
No.・
・・・・
・
L
Commercial CT
K
3m
8
KM50-C1-FLK
Safety Precautions
CAUTION
Indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury,
or property damage.
CAUTION
Fire or property damage may occasionally occur.
Tighten terminal screws to the specified tightening
torque.
The recommended tightening torque is 0.69 to 0.88
N•m.
Confirm that the screws are straight (i.e., not at an
angle) after tightening them.
Minor or moderate bodily harm or property damage
may occasionally occur due to explosion.
Do not use the product near inflammable or explosive
gas.
Destruction or rupture may occasionally occur.
Make sure that the power supply voltage is within
specifications.
Destruction or rupture may occasionally occur.
The voltage input circuit and CT secondary circuit are
not isolated. If a Special CT is grounded, incorrect
wiring will short circuit the voltage input and the
secondary circuit of the CT. To prevent failure, do not
ground a Special CT.
The Power Monitor uses a Special CT. Correct
measurements can be made even if the CT is not
grounded.
Electrical shock may occasionally occur.
Always turn OFF the power supply before connecting
CTs.
Electrical shock may occasionally occur.
Do not touch any of the terminals while the power is
being supplied.
Electrical shock may occasionally occur.
The voltage input circuit and CT secondary circuit are
not isolated.
Do not touch the secondary side of the Special CT.
Electrical shock, minor injury, fire, or equipment
malfunction may occasionally occur.
Do not attempt to disassemble, modify, or repair the
product.
9
KM50-C1-FLK
Precautions for Safe Use
Precautions for Correct Use
1. Do not store, install, or use the product in the following locations.
• Locations that are greatly affected by vibration or shock
• Unstable locations
• Outdoors or locations that are subject to direct sunlight, wind, or rain
• Locations where the specified range of temperature or humidity
would be exceeded
• Locations that are subject to rapid changes in temperature or
humidity where condensation or icing may occur
• Locations that are affected by static electricity or noise
• Locations that are subject to corrosive gas (particularly sulfide
or ammonia gas)
• Locations that are excessively dusty or dirty
• Locations that are subject to flooding or oil
• Locations that are affected by electric or magnetic fields
• Locations that are subject to splashing brine
2. Install the product in a panel with a panel thickness of 1 to 8 mm.
If a suitable panel thickness is not used or the product is installed
incorrectly, the product may come free from the mounting.
3. Do not attempt to pull the internal part of the product out of the case.
Pulling out the internal part of the product will increase the contact
resistance of the internal terminals, possibly damaging
measurement accuracy.
4. Read and understand the Operation Manual before attempting to
install, use, or maintain the product.
Electrical shock, injury, accidents, failure, or malfunction may occur.
5. Always check the wiring and confirm that it is correct before turning
ON the power supply.
Incorrect or improper wiring may result in electrical shock, injury,
accidents, failure, or malfunction.
6. Use power supplies and wires with suitable specifications for the
control power supply and the power supply for inputs and other
parts of the system.
Failure, burning, or electrical shock may result.
7. Do not install the product near sources of heat, such as devices
with coils or windings.
8. Check all terminal numbers before wiring.
9. Do not connect anything to unused terminals.
10.Use crimp terminals that are suitable for M3.5 screws to wire the
product.
11.Install the product well separated from devices with strong highfrequency noise (such a high-frequency welders or sewing
machines) or devices that generate surge.
12.To prevent inductive noise, wire the lines connected to the product
separately from power lines carrying high voltages or currents. Do
not wire in parallel with or on the same cable as power lines. Other
measures for reducing noise include running lines along separate
ducts and using shields.
13.Do not touch conductive metal parts on the product or the CT
terminals while power is being supplied.
14.Do not use the product for measurement on the secondary side of
an inverter.
15.Do not block the ventilation holes in or the areas around the
product to ensure proper dissipation of heat.
16.Touch grounded metal to discharge any static electricity before
touching the product.
17.Do not remove the terminal blocks from the product. Doing so may
cause failure or malfunction.
18.Do not continue to use the product if the front surface peels or
becomes cracked.
Water may enter the product.
19.Install and suitably label a switch or circuit breaker that complies
with relevant requirements of IEC 60947-1 and IEC 60947-3 so
that the operator can immediately turn OFF the power supply.
20.When using the product in an Overvoltage Category 3
environment, externally install varistors between the power supply
and voltage measurement inputs to the product.
21.Use only the Special CT and Special CT Cable specified by OMRON.
Special CTs: KM20-CTF-5A, KM20-CTF-50A, KM20-CTF-100A,
KM20-CTF-200A, KM20-CTF-400A, or KM20-CTF-600A
Special CT Cable: KM20-CTF-CB3 (3 m)
22.The Power Monitor is a Class A product (for use in industrial
environments).
In residential environment areas it may cause radio interference. If
it causes radio interference, the user may be required to take
adequate measures to reduce interference.
1. Make sure that all parameters are set suitably for the
measurement target.
2. This product is not a Special Measuring Instrument that has
passed testing by a specified body under the Measurement Act of
Japan. It cannot be used to certify power consumption under
Japanese law.
3. Do not use solvents, such as paint thinners, to clean the product.
Use commercially available alcohol instead.
4. Make sure the rated voltage is reached within 2 s after the power
is turned ON.
Otherwise, the product may not operate correctly.
5. When discarding the product, properly dispose of it as industrial
waste according to all applicable local ordinances.
6. If a water-proof structure is required, install the enclosed
Waterproof Packing.
Depending on the application environment, the Waterproof
Packing can deteriorate, shrink, or harden. We recommend that
you replace it periodically.
Waterproof Packing: Y92S-29 (sold separately)
7. Remove the protective film from the front of the product before
using the product.
8. Wire the middle row (terminals 11 to 15) last.
Refer to “Terminal Arrangement” on page 6.
9. Reception interference may occur if the KM50 is installed near
radios, televisions, or other wireless devices.
10
KM50-C1-FLK
Dimensions
(Unit: mm)
Smart Power Monitor
6
Panel Mounting Dimensions
Terminal cover
(E53-COV17)
Waterproof Packing
(Y92S-29)
45 + 00.6
91
48
1.5
78
KM50-C
P
48
OUT1 STOP
UP
58
44.8 48.8
11
6
12
7
13
8
14
9
15
10
45 + 00.6
• Use M3.5 crimp terminals.
• The mounting panel must be 1 to 5mm thick.
• When mounting KM50-C Power Monitors side by side,
provide sufficient space between them.
• Reference separation: 60 mm (top, bottom, left, and right)
• Make sure that the rated ambient temperature of the
KM50-C Power Monitor is not exceeded when more than
one Power Monitor is mounted.
SHIFT MODE ENTER
Mounting Adapter (enclosed)
(Y92F-30)
CTs
KM20-CTF-5A
KM20-CTF-50A
CT inner diameter
10 R5
33
39 7.9 7.4
CT inner diameter
10
R5
22.9
9.5 8.5
28.9
R8
R7.5
7.5
5.57
25.3
25.5
3
3
41.3
48
40
40.5
KM20-CTF-100A
KM20-CTF-200A
CT inner diameter
11
29.4
37.4 14.5
16
CT inner diameter
R10
24
R8
44.9
55.9 24
R9
R8
14.2
3
30.5
35.5
6
53.7
75.7
46
52.5
KM20-CTF-400A/600A
KM20-CTF-CB3 (Special CT Cable)
CT inner diameter
37
R18.5
CT end
Power Monitor end
35.5
62.5
73.5
Shrinking tube
R13
35.5
6
92.5
3m
54
11
KM50-C1-FLK
Special CTs and CT Cable
• Use only the CTs and CT Cable specified by OMRON.
• If any other CTs or CT Cables are used, normal measurements will
not be possible.
• The Special CTs have polarity.
Connect the Special CT correctly, connecting the 1S or 3S terminal
on the Power Monitor to the k terminal on the CT and the 1L or 3L
terminal on the Power Monitor to the l terminal on the CT.
• Do not ground the Special CTs. Failure may occur.
Special CTs for the KM20-B40 and KM20-B40FLK
Rated primary current of 5 A: KM20-CTF-5A
Rated primary current of 50 A: KM20-CTF-50A
Rated primary current of 100 A: KM20-CTF-100A
Rated primary current of 200 A: KM20-CTF-200A
Rated primary current of 400 A: KM20-CTF-400A
Rated primary current of 600 A: KM20-CTF-600A
KM20-CTF-series CT Cable
KM20-CTF-CB3 (3 m)
12
KM50-C1-FLK
Optional Accessories
(Unit: mm)
Mounting Bracket Dimensions
92
KM50-OPT-ED1
To mount the KM50-E
45
DIN Track mounting plate
56
131.1
121.6
68
45
45
60
4-M4
121.6
15
DIN Track mounting plate
position change screw holes
60
96
70
To mount the KM50-C
Four, 4.5-dia. direct-mounting screw holes
Four, M3 magnet mounting screw holes
56.5
92
KM50-OPT-EM1
To mount the KM50-E
45
Magnet
128.4
121.6
68
45
56.5
45
121.6
70 96
60
To mount the KM50-C
15
60
56
4-M4
45
KM50-OPT-CD1
45
DIN Track mounting plate
66.7
45
112.7
103.2
56
4-M4
48
25
45 96
64.2
25
48
Four, 4.5-dia.
direct-mounting screw holes
45
45
13
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses regarding the Products unless Omron’s analysis confirms that the Products
were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate
modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2015.9
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2015 All Right Reserved.
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