Panasonic KW1M-H User manual

i
【KW1M-H (SD card type)】
Basic setting to measure by Eco-POWER METER
When wiring the main unit and the current transformer (CT) and setting the basic setting after power on,
you can measure the power
The basic setting of MODE1 is necessary to measure.
In order to use the other functions, the settings of the each parameter are necessary.
*Be sure to set calendar timer (clock) and
initialize memory of main unit before measuring.
Check demand
display
After measuring,
insert
SD memory card
Check log data
with option mode
Check alarm
output
Check measured
data via
communication
device
What to do
Measure Power
Mount / Connection
Settings
Count pulse
output from
other device
Output Alarm
Log data
Read out
log data
Wire the main unit
Connect the current transformer (CT)
Wire output
line
Collect data
via RS485
Prepare
SD memory
card
Wire
communication
line
Wire input
line
Power on the main unit
Set calendar timer and initialize memory of main unit (＊) (MODE4)
Set the parameter for
pulse measurement
Set log
setting
(MODE4)
Check measured
data with power
monitoring mode
Set alarm
output
(MODE1)
Check count value
with power
monitoring mode
Set
communication
setting
(MODE3)
Set the basic settings (MODE1)
Set log
setting
(MODE4)
p.14
p.26
p.21
p.14
p.24
p.26
p.26
How to use
6.2
6.2
6.3
5.2
5.4
7
3
3
3
3
3
Use demand
function
Set demand
settings
(MODE1,2)
P14,21
6.4

ii
Cautions for Your Safety
Read the manual carefully before installing, running and maintenance for proper operation.
Before using, master the knowledge of the equipment, safety information and all of other
notes.
This manual uses two safety flags to indicate different levels of danger.
WARNING A handling error could cause serious physical injury to an operator
and in the worst case could even be fatal.
●Always take precautions to ensure the overall safety of your system, so that
the whole
system remains safe in the event of failure of this product or other external factor.
●Do not use this product in areas with inflammable gas. It could lead to an explosion.
●Exposing this product to excessive heat or open flames
could cause damage to the
lithium battery or other electronic parts.
CAUTION A handling error could cause serious physical injury to an operator
or damage to the equipment.
●To preven
t abnormal exothermic heat or smoke generation, use this product at the
values less than the maximum of the characteristics and performance that are assured
in these specifications.
●Do not dismantle or remodel the product. It could lead to abnormal exothermic heat or
smoke generation.
●Do not touch the terminal while turning on electricity. It could lead to an electric shock.
●Use the external devices to function the emergency stop and interlock circuit.
●Connect the wires or connectors securely. The loose connection might cause abnormal
exothermic heat or smoke generation.
●
Do not allow foreign matters such as liquid, flammable materials, metals to go into the
inside of the product. It might cause exothermic heat or smoke generation.
●Do not undertake construction (such as connection and disconnection) while the power
supply is on.
●Do not use at secondary side circuit of inverter. It might cause exothermic
heat or
damage.
Copyright and trademark
●Panasonic Electric Works SUNX Co., Ltd. owns the copyright of this manual.
●We stiffly refuse the reproduction of without permission from this manual.
●Modbus Protocol is a communication protocol that the Modicon Inc.developed for PLC.
●O
ther company names and the product names are the trademarks or registered
trademarks of each company.

iii
Introduction
Thank you very much indeed for purchasing
‘KW1M-H Eco-POWER METER’.
In this manual, we explain the usage of ‘KW1M-H
Eco-POWER METER’ in detail.
Please use it correctly after understanding the content
enough.

iv
Table of Contents
Chapter 1 Unit’s Features and Structure ................................................................................................... 1
1.1 Unit’s Name and Model Numbers............................................................................................................ 1
1.1.1 Main unit......................................................................................................................................... 1
1.1.2 Option............................................................................................................................................. 1
1.1.3 Tool................................................................................................................................................. 2
1.1.4 Firmware......................................................................................................................................... 2
1.2 Measurement items ................................................................................................................................. 3
Chapter 2 Parts Name and Working..........................................................................................................4
2.1 Parts Names............................................................................................................................................ 4
2.2 Key’s Functions........................................................................................................................................ 4
Chapter 3 Wiring.........................................................................................................................................5
3.1 Terminal arrangement ............................................................................................................................. 5
3.2 Wiring Diagrams ...................................................................................................................................... 6
3.3 How to attach the Current Transformer (CT)........................................................................................... 7
3.4 For input connection ................................................................................................................................ 9
3.5 For Output connection ........................................................................................................................... 10
3.6 RS485 Communication.......................................................................................................................... 10
3.7 Low Voltage Directive............................................................................................................................ 11
Chapter 4 Settings....................................................................................................................................12
4.1 Operation procedure.............................................................................................................................. 12
4.2 Setting Mode Explanation...................................................................................................................... 15
4.2.1 MODE1 (Mode for setting each parameter for power measurement.)......................................... 15
4.2.2 MODE2 (Mode for setting of each parameter for pulse measurement)....................................... 22
4.2.3 MODE3 (Mode for setting of each parameter for serial communication)..................................... 25
4.2.4 MODE4 (Mode for setting of each parameter for optional function) ............................................ 27
4.2.5 Remove SD memory card............................................................................................................ 28
Chapter 5 Various Functions....................................................................................................................31
5.1 LOCK mode........................................................................................................................................... 31
5.2 Pulse output function ............................................................................................................................. 31
5.2.1 Output depends on integrated electric power .............................................................................. 31
5.2.2 Instantaneous electric power alarm ............................................................................................. 31
5.2.3 Current alarm................................................................................................................................ 31
5.2.4 Stand-by power alarm.................................................................................................................. 31
5.2.5 Output depends on count value ................................................................................................... 31
5.2.6 Demand alarm.............................................................................................................................. 31
5.2.7 Pulse-through............................................................................................................................... 31
5.3 Counter function..................................................................................................................................... 32
5.3.1 Operation mode............................................................................................................................ 32
5.3.2 Change the Preset Value............................................................................................................. 32
5.4 Log data writing function........................................................................................................................ 33
5.4.1 In case that you insert SD memory card...................................................................................... 33
5.4.2 In case that SD memory card is always inserted to card slot ...................................................... 33
5.4.3 Unit memory................................................................................................................................. 34
5.4.4 Format for written file.................................................................................................................... 35
5.4.5 File name and Saved folder ......................................................................................................... 37
5.4.6 Logging data................................................................................................................................. 38
5.5 Demand function.................................................................................................................................... 39
5.6 Clock Correction function....................................................................................................................... 41

v
Chapter 6 Display of each Value..............................................................................................................42
6.1 Working of Monitor Display.................................................................................................................... 42
6.2 Power Monitoring mode......................................................................................................................... 45
6.2.1 Integrated electric power.............................................................................................................. 45
6.2.2 Instantaneous electric power........................................................................................................ 45
6.2.3 Current.......................................................................................................................................... 46
6.2.4 Voltage ......................................................................................................................................... 46
6.2.5 Electricity Charge ......................................................................................................................... 47
6.2.6 Carbon dioxide conversion value................................................................................................. 47
6.2.7 Power factor ................................................................................................................................. 47
6.2.8 Frequency..................................................................................................................................... 48
6.2.9 Hour meter.................................................................................................................................... 48
6.2.10 Pulse input value........................................................................................................................ 49
6.3 Option mode .......................................................................................................................................... 50
6.3.1 Calendar/Timer............................................................................................................................. 50
6.3.2 Monthly integrated electric power (kWh)...................................................................................... 50
6.3.3 Daily integrated electric power (kWh) .......................................................................................... 51
6.3.4 Hourly integrated electric power (kWh)........................................................................................ 52
6.4 Demand monitoring mode ..................................................................................................................... 53
6.4.1 Demand power display................................................................................................................. 53
6.4.2 Ratio of estimated demand .......................................................................................................... 54
6.4.3 Demand log (D.LOG) ................................................................................................................... 55
6.4.4 Monthly max. demand log (D.MON)............................................................................................. 56
6.4.5 Max. demand (D.MAX)................................................................................................................. 57
6.5 Other indication...................................................................................................................................... 58
6.5.1 Power On indication ..................................................................................................................... 58
6.5.2 Indication while communication.................................................................................................... 58
Chapter 7 Communication........................................................................................................................59
7.1 Communication Procedures .................................................................................................................. 59
7.2 Communication timing ........................................................................................................................... 59
7.3 MEWTOCOL Communication................................................................................................................ 60
7.3.1 Overview of MEWTOCOL-COM (RS485).................................................................................... 60
7.3.2 Data Register List (MEWTOCOL)................................................................................................ 61
7.3.3 Error Codes.................................................................................................................................. 63
7.3.4 Command..................................................................................................................................... 63
7.4 MODBUS (RTU) Communication.......................................................................................................... 65
7.4.1 Overview of MODBUS (RTU)....................................................................................................... 65
7.4.2 Data Register List......................................................................................................................... 68
Chapter 8 Specifications ..........................................................................................................................71
8.1 Main unit ................................................................................................................................................ 71
8.2 Input Specifications................................................................................................................................ 71
8.2.1 Electric power input...................................................................................................................... 71
8.2.2 Pulse input.................................................................................................................................... 72
8.2.3 Pulse for demand monitor input ................................................................................................... 72
8.3 Output Specifications............................................................................................................................. 73
8.3.1 Pulse output (Transistor output)................................................................................................... 73
8.4 Communication Specifications............................................................................................................... 73
8.5 Main Unit Memory Specifications .......................................................................................................... 74
8.6 External Memory Specifications ............................................................................................................ 75
8.6.1 Demand power............................................................................................................................. 76
8.7 Self-diagnostic function.......................................................................................................................... 76
8.8 Power Failure Memory........................................................................................................................... 76
8.9 Applicable standard ............................................................................................................................... 77
8.10 Dedicated Current Transformer Specifications.................................................................................... 78
Chapter 9 Mounting..................................................................................................................................79
9.1 Dimensions............................................................................................................................................ 79
9.1.1 Main unit....................................................................................................................................... 79
9.2 How to mount to DIN rail........................................................................................................................ 80
9.3 How to connect / replace the battery..................................................................................................... 80
Chapter 10 Q&A.......................................................................................................................................81

vi
Cautions before using
■
Installation environment
◇
Do not use the Unit in the following environments.
・Where the unit will be exposed to direct sunlight and where the ambient temperature is outside
the range of -10 to 50 °C.
・Where the ambient humidity is outside the range of 30 to 85 % RH (at 20℃, non-condensing)
and where condensation might occur by sudden temperature changes
・Where inflammable or corrosive gas might be produced
・Where the unit will be exposed to excessive airborne dust or metal particles
・Where the unit will be exposed to water, oil or chemicals
・Where organic solvents such as benzene, paint thinner, alcohol, or strong alkaline solutions
such as ammonia or caustic soda might adhere to the product
・Where direct vibration or shock might be transmitted to the product, and where water might wet
the product
・Where the place near high-voltage cable, high-voltage device, power line, power device.
・Where the place near a machinery with transmission function such as amateur radio.
・Where the place near a machinery which occurs the big switching serge
◇
Please use the Unit according to the specifications described in this manual. Otherwise, it
may malfunction or cause fire and an electric shock.
・Connect to the power supply in compliance with the rating.
・Refer to the wiring diagram to ensure proper wiring for the power supply, input and output.
・Do not perform wiring or installation with a live line. It may also lead to circuit burnout or fire by
way of the secondary CT side opening.
■
Installation
・Installation and wiring must be performed by expert personnel for electrical work or electric
piping.
・The power supply terminal and voltage input terminal of the main unit is common. Therefore if
additional noise effects the power supply line, incorrect measurements may result.
・Eco-POWER METER is designed to be used in a control panel.
・Do not add an excess power to the display. It might break the inner liquid crystal.
■
As to measurement
･If there is some distortion by harmonic or waveform, it may not measure correctly.
Please check with the actual system before adopts it.
･This can’t measure the power that flows reverse such as a regenerative electric power.
If you measure a reverse power, it shows ‘0.00kW’ and it doesn’t count.
・It might not measure an instantaneous current such as an inrush current or an welding machine.
・When measuring the below loads, it might not satisfy with the accuracy guarantee.
Out of rating current, Load with low power factor,
Load with winding current, Load with ferromagnetic field
・Power factor operation is a method assuming balanced load. The error might be big when it
measures unbalanced load.
■
Static electricity
・Discharge static electricity touching the grounded metal etc. when you touch the unit.
・Excessive static electricity might be generated especially in a dry place.
■
Cleaning
・Wipe dirt of the main unit with soft cloth etc. When thinner is used, the unit might deform or be
discolored.

vii
■
Power supply
・Connect a breaker to the voltage input part for safety reasons and to protect the device.
The breaker that connects to the voltage input part must arrange at the position easily reached,
and display shows it is the breaker of the equipment.
・Do not turn on the power supply or input until all wiring is completed.
■
Before power on
Please note the following points when turning on power at the first time.
・Confirm there are neither wiring rubbish nor especially an electrical conduction when installed.
・Confirm neither the power supply wiring, the I/O wiring nor the power-supply voltage are wrong.
・Tighten the installation screw and the terminal screw surely.
・Use an electric wire applicable to the rated current.

KW1M-H Eco-POWER METER
1
Chapter 1 Unit’s Features and Structure
KW1M-H Eco-POWER METER is the suitable size wattmeter for installing in a control board.
It measures electrical power, voltage, current and so on using AC voltage and AC current input.
It also works ad an hour meter, which is measured power-on or power-off time.
1.1 Unit’s Name and Model Numbers
1.1.1 Main unit
Product name KW1M-H Eco-POWER METER SD card type
Model No.
AKW1121B
(CT connector color; Blue)
AKW1121
(CT connector color; Wihte)
Log function
Available
Demand function *
Available
Phase and Wire system
・
Single-phase two-wire
・Single-phase three-wire
・Three-phase three-wire
・Three-phase four-wire
Power supply 100-240V AC 50/60Hz
Measured voltage input ・400VAC
・100/200VAC
Measured current input 50A / 100A / 250A / 400A / 600A
Current transformer Dedicated CT type
Terminal type Screw Terminal (M3 + / - screw)
* Demand function by pulse input is available for Ver.1.20 or more.
Note) AKW1121B and AKW1121 are not compatible.
Please be aware that only AKW1121B and AKW4x0xB (CT) can be used together.
1.1.2 Option
Dedicated Current Transformer (CT) Clamp-on type
Product name
Rated
primary current
Connector
color
Model No
Dedicated current transformer for 5A/50A 5A / 50A
Blue
AKW4801B
White
AKW4801C
Dedicated current transformer for 100A 100A
Blue
AKW4802B
White
AKW4802C
Dedicated current transformer for 250A 250A
Blue
AKW4803B
White
AKW4803C
Dedicated current transformer for 400A 400A
Blue
AKW4804B
White
AKW4804C
Dedicated current transformer for 600A 600A
Blue
AKW4808B
White
AKW4808C
Note) AKW480xB and AKW480xC are not compatible.
Dedicated Current Transformer (CT) Through type
Product name
Rated primary
current
Connector
color
Model No
Dedicated current transformer for 50A/100A 50A / 100A
Blue
AKW4506B
White
AKW4506C
Dedicated current transformer for 250A/400A 250A / 400A
Blue
AKW4507B
White
AKW4507C
Dedicated current transformer for 600A 600A
Blue
AKW4508B
White
AKW4508C
Note) AKW450xB and AKW450xC are not compatible.

KW1M-H Eco-POWER METER
2
Others
Product name
Model No
Mounting rail AT8-DLA1
Fastening plate ATA4806
Battery *1)Required to back up memory and calendar AFPG804
Mounting frame AKW1822
Extension cable for CT 3m AKW4703
Extension cable for CT 5m AKW4705
*1) Included with the product when shipped.
1.1.3 Tool
Product name Functions Model No
Data collection software
KW Monitor ・
Monitoring and logging the measured
values.
Download from our website.
Free of charge
Power display tool
KW View
It makes graph by using data
from Eco-POWER METER
Download from our website.
Free of charge
Note) Members registration is required to download.
1.1.4 Firmware
For using the additional functions of KW1M-H
Functions
Supported version
- 600A CT input
Ver.1.05 or more
- Simple demand measurement
Ver.1.10 or more
- Demand measurement by pulse input
- Clock correction function (±30 sec./month) Ver.1.20 or more
- Remove SD memory card function
- Clock correction function (±1 sec./month) Ver.1.30 or more
- Pulse-through with pulse output
Ver.1.40 or more
Note) You can’t use the additional functions without the supported firmware.

KW1M-H Eco-POWER METER
3
1.2 Measurement items
Item
Unit
Data range (Display)
Integrated electric power (Active)
kWh/
MWh
0.00 to 9999.99MWh
(9-digit display) 0.00 to 9999999.99kWh
Instantaneous electric power (Active) kW 0.00 to 9999.99
Current R-current A 0.0 to 6000.0S-current
T-current
Voltage R(RS)-voltage V 0.0 to 9999.9S(RT)-voltage
T(TS)-voltage
Electricity charge *1 0.00 to 999999
Conversion value Carbon dioxide kg-CO20.00 to 999999
Power Factor
0.00 to 1.00
(Identify leading phase(－) and lagging phase)
(
Within the range of phase angle θ=-90 to 90 degree
)
Frequency Hz 47.5 to 63.0
Hour meter ON-time hour 0.0 to 99999.9
OFF-time
Pulse counter 0 to 999999
Integrated electric power converted
by pulse
kWh/
MWh
0.000kWh to 9999.99MWh
Demand *2
Present
demand
kW 0.00 to 9999.99
Estimated
demand
kW 0.00 to 9999.99
Ratio of
estimated
demand
% 0.0 to 9999.9
*1 Eco-POWER METER is designed chiefly to manage saving energy.
It is neither intended nor can it be legally used for billing.
*2 Please use this demand function as your standard. The demand value calculated with this function is
not guaranteed.

KW1M-H Eco-POWER METER
4
Chapter 2 Parts Name and Working
2.1 Parts Names
①MODE indicator Lighting when mode setting
②LOCK indicator Lighting while in lock mode
③OP. output indicator Lighting when pulse output
④Mode display Display mode in setting and measurement item with 16-seg
⑤
Display each value
With 7-seg
・Display each measured value
・Display each setting value
⑥POWER indicator Lighting while power on
⑦TX/RX indicator Blinking while communication
⑧<MODE> key
⑨<SET> key
⑩<SHIFT / ▽> key ①⑥
⑪<ITEM / △> key ②⑦
④
③
⑤
⑧⑪
⑨⑩
2.2 Key’s Functions
Key
Functions
<MODE> ・
Use to shift setting mode
<SET> ・Use to set each value entered
・Reset stand-by alarm while output the alarm
(only available while output the stand-by alarm)
<SET>
(continuous press 3-sec) ・All keys locked
・Release lock mode while in lock mode
<SHIFT/▽> ・To select measured value display (While monitoring)
・To select setting value (While setting mode)
<ITEM/△> ・To select measured value display (While monitoring)
・To select setting value (While setting mode)
<SET>+<MODE> ・
To reset the measured value
<SET>+<ITEM/△> ・To shift power monitoring mode and option mode
<SET>+<SHIFT/▽> ・To shift power monitoring mode and simple demand mode

KW1M-H Eco-POWER METER
5
Chapter 3 Wiring
Be sure to wire correctly according to the terminal arrangement and wiring diagrams.
After completing wiring, be sure to attach the terminal cover for safety reasons.
3.1 Terminal arrangement
No. Function
①
L
Power supply
②N
③N.C.
④
P1
Measured
voltage
input
⑤P0
⑥P2
⑦
P3
⑧＋RS485
⑨－
⑩E
⑪ ＋
Pulse output
⑫－
⑬＋Pulse input
⑭－
The input voltage to each terminal is as follows.
Terminal
Phase and wire
Terminal
Input voltage
Operating
power supply
Single-phase,
two-wire
①－②
100
-240VAC (100 – 240V～) (Line voltage)
Measured
voltage input
Single-phase,
two-wire
④－⑤ 0-440VAC ( 0-440V～) (Line voltage)
Single-phase,
three-wire
④－⑤－⑥ 0-220VAC ( 0-220V～：3W) (Phase voltage)
Three-phase,
three-wire
④－⑤－⑥ 0-440VAC ( 0-440V 3～) (Line voltage)
Three-phase,
four-wire
④－⑤－⑥－⑦ 0-254VAC ( 0-254V 3N～) (Phase voltage)
Caution for Wiring
1) Terminal fastening torque should be 0.5 to 0.6N･m. In case of using a crimping terminal, use it with
insulating sleeve applicable to M3 screw.
2) This has no built-in power switch, circuit breaker for power supply part. To protect the device, it is
necessary to install power switch and circuit breaker in the power supply circuit.
And this has no built-in power switch, circuit breaker or fuse for measured voltage input parts.
Therefore it is necessary to install them in the circuit near this unit.
3) We recommend a wire with the cross section of 0.75 to 1.25mm2for power supply line and measured
voltage input line.
4) Use flame-resistant cable for each wiring.

KW1M-H Eco-POWER METER
6
3.2 Wiring Diagrams
Please connect a breaker (3 to 15A) to the voltage input part for safety reasons and to protect the
device. Grounding the secondary side of VT (Voltage transformer) and CT (Current transformer) is not
necessary with low-voltage circuit.
◆When measuring a load with rated input voltage (100-200V system/ 400V system)
Single-phase two-wire system
*One current transformer (CT) is required.
Do not wire ⑥⑦terminals. They are connected internal.
Single-phase three-wire / Three-phase three-wire system
*Two current transformers are required.
Do not wire ⑦terminal. It is connected internal.
Three-phase four-wire system
*Three current transformers are required.

KW1M-H Eco-POWER METER
7
◆When measuring a load with exceed input voltage
Voltage transformer (VT) is needed when you measure a load with over rated input voltage (440V).
Use VT, those secondary rating is 110V.
Grounding the secondary side of VT and CT is not necessary with low-voltage circuit.
Single-phase two-wire system
Single-phase, three-wire system
Three-phase, three-wire system
Three-phase, four-wire system
◆Using the clock correction function by frequency of the measured voltage
It corrects the clock by using the measured voltage frequency input to P1-P0 as a reference
frequency.
When P1-P0 terminals are not connected or it set OFF for clock correction function, it doesn’t correct
the clock.
3.3 How to attach the Current Transformer (CT)
・One current transformer (CT) is needed to measure 1P2W system. Two CTs are needed to measure a
1P3W/3P3W system. Three CTs are needed to measure a 3P4W system. Using all CT should be the
same.
・Check beforehand that the thickness of the electric wire is smaller than the through-hole of the CT.
・When connecting CT, connect the secondary side to the terminal of the main unit first, and after that
wire the primary side to a load electric wire.
Incorrect order might cause an electric shock or break CT.
・The CT has polarity. Wire correctly according to the K and L marks.
Wrong direction can’t measure correctly.
・When closing clamp-on type CT, check that there is no foreign materials on the divided face. And
make sure it is closed securely once the wire is in place; if not the measurement value will be not
accurate.
・When CT’s cable is extended, it is possible to extend up to about 10m with the cable of AWG#22 or
more cross section under the environment without noise at all. Please use the thick cable as much as
possible. *Please check beforehand with the actual system in case of extending the cable.
･If there is some distortion by harmonic or waveform, it may not measure correctly. Please check with
the actual system before adopting it.
・Separate the wiring (strong electric part) of the measured voltage input terminal (operating power
supply terminal) from the CT cable. It may not satisfy the accuracy due to noise.
・Only same color housing of cable and connector of CT can be connected.
That of different color (blue and white) can't be connected.

KW1M-H Eco-POWER METER
8
◇To connect CT with secondary side current 5A
How to set for measuring by combination with CT (secondary side current 5A)
(1) Select 5A at CT type setting mode (CT-T).
(2) Set the primary current of measured CT (secondary side current 5A) at primary side current of
CT setting mode (CT-1).
<ex> If the measured CT is 400A/5A, set to’400’.
(3) Clamp the dedicated CT for 5A, which is connected to the main unit first, to secondary side of
the CT (secondary side current 5A). CT direction (K→L) should be set for the commercial CT
direction.
*Set the CT (secondary side current 5A) and the dedicated CT for 5A approximately 1m apart.
If the two CTs are set too close each other, it may not measure accurately due to magnetic
field interference.
(Connection example)
With Ammeter etc.
Without Ammeter
Secondary current
Breaker
Dedicated CT for 5A
Ammeter etc.
Power supply
CT with 2nd current 5A
L K
K
L
Eco-POWER
METER
Load
Secondary current
Breaker
Power supply
CT with 2nd current 5A
K
L
Load Dedicated CT for 5A
L K
Eco-POWER
METER
Shorted or resistor less than 0.1
Ω

KW1M-H Eco-POWER METER
9
3.4 For input connection
・Contact input
Use highly reliable metal plated contacts. Since the contact’s
bounce time leads directly to error in the count value, use
contacts with as short a bounce time as possible. In general,
select 30Hz for max. counting speed.
・Non-contact input (Transistor input)
Connect with an open collector. Use the transistor with the
following specifications. VCEO=20V min. IC=20mA min. ICBO=6μA max
Use transistors with a residual voltage of less than 1.5V when the transistor is ON.
＊Short-circuit impedance should be less than 1kΩ.
(When the impedance is 0Ω, drain current is approx. 7mA.)
Open-circuit impedance should be more than 100kΩ.
・Input wiring
Please wire up to 10m by using a shielded wire or a metallic electric wire tube individually.
If it is long, it may not work correctly due to floating capacitance of wire.
(Note)
Operating power supply input part and measured voltage input are not insulated to pulse input parts.
So the input equipment must have the power supply transformer in which the secondary side is not
grounded with the primary and secondary sides insulated, in order to prevent interference of the
power supply circuit when connecting the external input circuit. Be sure not to use an
auto-transformer.
⑬⑭
P.IN +
P.IN
－
Eco-POWER
METER
(＋)
(
－
)
Insulated
transformer
Input equipment
(sensor etc.)
Operating power supply
Measured voltage input
(Fig. A)
Good example
Eco-POWER
METER
(＋)
(
－
)
Eco-POWER
METER
Auto transformer
(Fig.B) No Good example
Do not ground the secondary side.
Do not use an auto-transformer.
Operating power supply
Measured voltage input
Operating power supply
Measured voltage input
Insulated
transformer
Input equipment
(sensor etc.)
Input equipment
(sensor etc.)
(＋)
(
－
)

KW1M-H Eco-POWER METER
10
3.5 For Output connection
・Since the transistor output is insulated from the internal circuit by a photo-coupler, it can be used both
as a plus common and minus common.
・Wire up to 100m for output connection.
If it is long, it may not work correctly due to floating capacitance of wire.
3.6 RS485 Communication
・When using shielded cable for the RS485 transmission line, ground one end.
Use a class D dedicated earth for grounding. Do not share a ground with other earth lines. (Fig.1)
・Be sure to connect with daisy chain the RS485 transmission line between each unit.
Do not use a splitter. (Fig.2)
・With a terminal station, RS485 (E) (No.10) and RS485 (-) (No.9) should be shorted.
*E terminal is not SG (signal ground) terminal. Do not ground shielded cable.
(Fig.1)
(Fig.2)
Power supply for Load
- +
Plus common
Eco-POWER METER
Pulse (－)
Pulse (+)
Minus common
11
- +
Eco-POWER METER
Power supply for Load
12
Pulse (－)
Pulse (+)
11
12
Load
Load
Correct wiring
○
Incorrect wiring
×
Terminal Terminal
station station

KW1M-H Eco-POWER METER
11
Recommended Cable
Use the transmission cables shown below for Eco-POWER METER RS485 communication system.
Cable
Conductor
Insulator
Cable
diameter Applicable cable
Size
Resistance
(at 20
℃）
Material Thickness
Twisted-
pair
with shield
1.25 mm2
(AWG16)
or more
Max.16.8 Ω /km
Polyethylene Max.
0.5 mm Approx. 8.5 mm
HITACHI
KPEV-S
1.25 mm2×1P
Belden Inc. 9860
0.5 mm2
(AWG20)
or more
Max.33.4 Ω /km
Polyethylene Max.
0.5 mm Approx. 7.8 mm
HITACHI
KPEV-S
0.5 mm2×1P
Belden Inc. 9207
VCTF
0.75 mm2
(AWG18)
or more
Max.25.1 Ω /km
PVC Max.
0.6 mm Approx. 6.6 mm
VCTF
0.75 mm2×2C
(JIS)
Cable
Section
Notes
1) Use shielded type twist cables.
2) Use only one type of the transmission cables.
2) Do not mix different types of the cables.
3) Use twist pair cables under a bad noise
environment.
Twisted-pair
with shield
VCTF
3.7 Low Voltage Directive
When using in the application confirming to EN61010-1/IEC61010-1, make sure to satisfy the following
conditions.
(1) Pulse output part secure only basic insulation. In order to secure reinforced (double) insulation
demanded by EN 61010-1/ IEC61010-1, secure basic insulation or more with load side and
reinforced (double) insulation with communication system side.
(2) Provide the voltage input part with an EN60947-1 or EN60947-3 compliant circuit breaker.
The breaker that connects to the voltage input part must arrange at the position easily reached,
and display shows it is the breaker of the equipment.
(3) Use a wire with basic insulation or more for a wire cramped (or connected) CT.
【Environmental conditions】
・Overvoltage category Ⅱ, Pollution degree ２
・Indoor use
・An ambient temperature of –10 to 50℃
・An ambient non-condensing humidity of 35 to 85%RH (at 20℃)
・Altitude of 2000m or less
【Mount the product in a place with】
・A minimum of dust, and an absence of corrosive gases
・No flammable, explosive gasses
・Few mechanical vibrations or shocks
・No exposure to direct sunlight
・No large capacity electromagnetic switches or cables through which large current is flowing
Conductor Insulator
Jacket
Shield
Jacket
Conductor Insulator