For Electric Power Monitoring
KW2M SERIES
Eco-POWER METER
Energy saving and electric power quality monitoring with multiple circuits.
Main unit
KW2M-X
AKW264100A
Expansion unit
AKW272100A
4 units in total
■ One unit can measure two circuits. Up to three
expansion units may be connected for the
required number of circuits.
Main unit
Expansion unit
Up to 3 units can be added
Up to 8 circuits (three-phase four-wire), or up to 24 circuits
(single-phase two-wire)
■ Wire-saving and space-saving
Reduced man-hours through wire-saving. Easy wiring with push-in connectors. (Ø2.6mm single-core cables)
Power
supply
Measured
voltage
Power
supply
Conventional model
RS485
KW2M
Measured
voltage
ex) 4 circuits
Reduced
approx.
Electric power monitoring
48% (wiring)
57% (space)
CT
CT
RS485
4units 62 wiring
Main unit + 1 expansion unit 32 wiring
486 mm (assuming the space between devices to be 34 mm)
210mm
■ Internal memory(KW2M-X）
■ Ethernet communication
● Equipped with two Ethernet communication ports,
so devices can be daisy chained without adding a HUB.
● Connectable to both KW Watcher and Central monitoring system / SCADA at the same time.
● Measured data can be saved in CSV files
and visualized by KW Watcher.
Central monitoring
system SCADA
HUB
PC
Visualization software,
KW Watcher can be downloaded
for free from our website.
* Registry of customer information is required.
* For KW2M-A , DLL or ELC is required
to use "KW Watcher".
Ethernet
* Ethernet is a registered trademark of Fuji Xerox Co.,Ltd. and Xerox Corporation.
■ Web server functionality
Web server functionality allows operational settings of the device and upgrading the version of the main unit's firmware
without conventional dedicated software tools. Also real-time monitoring is possible with KW2M-X.
Real-time Monitoring Screen
Measurement Screen
※KW2M-X (AKW264100A) only
■ Web Creator (KW2M-X)
By uploading screens (content) that are setup as desired by the user with Control Web Creator to KW2M-X, the information in the KW2M-X internal Web server
can be monitored on a browser.
You, too, are a Web content creator
[ Control Web Creator ]
This is a graphics creation tool that allows you to easily design Web content that is published by the KW2M-X. You
can creatively design content by arranging Web components such as switches, lamps and meters on the screen and
then setting the properties. Your content will be linked toinformation in the KW2M-X without any knowledge of HTML.
Menu bar
AKW264100A
Web component property settings
Abundant Web component library
Tablet
Creation
area
Ethernet
Wi-Fi router
PC
* Wi-Fi is a registered trademark of Wi-Fi Alliance.
* Please provide commercially available products.
■ Same style of operation as the program display image creation tool
■ Components can be arranged by dragging and dropping.
■ Detailed component settings are easy using properties.
■ Components don’t lose quality when enlarged
or reduced, and you can color them as desired.
■ Images can be pasted in.
* Key unit (sold separately) is required to use Control Web Creator.
■ Power quality measurements (THD , harmonics up to the 31st order , and unbalance)
■ Hour meter function
■ IEC61010-1 CAT Ⅲ
■ Type
Product name
KW2M-A/KW2M-X
Eco-POWER METER
Phase and wire system
KW2M-A（standard type） Single-phase two-wire system
Main unit
Single-phase three-wire system
KW2M-X
（memory type）
Three-phase three-wire system
Three-phase four-wire system
Expansion unit
Operating power supply Input measured voltage
100 to 240 V AC
50/60 Hz
0 to 690V AC
* When UL standard is
supported
0 to 300V AC
Applicable current sensor *1
CT with secondary side
output 1A or 5A
Model No.
AKW263100A
AKW264100A
AKW272100A
*1 Dedicated current sensor (CT) cannot be used. Please use a general-purpose CT with a secondary side current 1A or 5A.
■ Web screen creation tools *1
Product name
Descriptions
Control Web Creator
Windows version. Downloadable free of charge from our website. Please purchase Key unit separately.
AFPSWC
Key unit*2
License key for Control Web Creator. 1 license. For USB port.
AFPSWCKEY
*1 Only for AKW264100A
*2 Key unit is required to create Web content. You do not need Key unit to view Web content on a browser.
0RGHO No.
Electric power monitoring
Tool bar
For Electric Power Monitoring
■ Specifications
Use safely and correctly after carefully reading the product specification manual, user manual, and operational instruction manual.
Measurement items
Accuracy
Item
Data display range
Instantaneous power
Integral power (import)
Integral power for each
time zone (4 zone ) (import)
Integral power (export)
Integral power for each
time zone (4 zone) (export)
Active
Reactive
Apparent
Active
Reactive
Apparent
Active
Reactive
Apparent
Active
Reactive
Active
Reactive
Current
Power quality
N-phase when 3P4W
Voltage (Phase and Line voltage)
Power factor
Frequency
Pulse count value
Power conversion value
Unbalanced current
Each phase
Unbalanced voltage
Each phase
Current THD (total harmonic distortion)
Each phase
Voltage THD (total harmonic distortion)
Each phase
Current harmonics (2nd to 31st)
Each phase
Phase
Voltage harmonics (2nd to 31st)
Line
ON
OFF
Hour-meter measurement
Standby
Maintenance
Active
Reactive
Apparent
Present demand
(Present value (inst. value) / Maximum demand) Active (export)
Reactive (export)
Current
−999.99GW to 0.000kW to 999.99GW
0.000kWh ~ 9999.9PWh
0.000 to 99.999kA
0.00 to 999.99kV
−1.000 to 0.000 to 1.000
0.00Hz to 99.99Hz
0.000 to 99999999
0.000kWh to 9999.9PWh
0.00% to 300.00%
0.00% to 300.00%
0.00% to 400.00%
0.00% to 400.00%
0.00% to 400.00%
0.00% to 400.00%
0.00% to 400.00%
0.0h to 99999.9h
0.0h to 99999.9h
0.0h to 99999.9h
0.0h to 99999.9h
0.000 kW to 999.9MW
Electric power monitoring
Ambient temperature
Ambient humidity
50/60Hz
15VA
（240V AC）
10ms
Operation: -10 to +50℃ 14 to 122°F
Storage: -25 to +70℃ −13 to 158°F
Insulation resistance(initial)
Vibration resistance
0.2%
* Single-phase three-wire system 2 (N) phase voltage,
three-phase three-wire system between 3-1 voltage,
three-phase four-wire system line voltage is 0.5%
* The tolerances of CT sensor and VT (instrument voltage transformer) are not included.
* 1 IEC62053 is the international standard for electrical power measuring devices.
* 2 Current less than 5% of rated value may be outside of accuracy assurance range
according to CT setting (maximum tolerance: 0.5%).
Demand monitoring and specifications
Demand type
Demand monitor input type
Current transformer input
Pulse input *1 (set with setting mode)
Demand time span
Demand measurement item
Demand data update cycle
1 to 60 min. (set with setting mode)
Present demand
1 min.
Present demand (Active / Reactive / Apparent
/ Active (export) / Reactive (export) / Current)
Display
Saved data
Web server specifications
Simultaneous access number
Web browser *1
● Enclosure - All terminals
● Between primary and secondary insulated
circuits (Double insulation is supported)
(1) Power supply terminals – other terminals
(2) Voltage input terminal – other terminals
Between the isolated circuits: 100 MΩ or more
10 to 150 Hz (7.5 minutes/cycle)
Single amplitude: 0.75 mm 0.030 in (1 h on 3 axes)
Save cycle
5-min.
instantaneous
value
Saved data
500, 1000, 2000, 3000 ms (set with setting mode)
Saved data
10 to 55 Hz (1 minute/cycle)
Single amplitude: 0.375 mm 0.015 in (1 h on 3 axes)
Min. 294 m/s2 (5 times on 3 axes)
Internal memory
Under 2,000 m 6,562 ft
Overvoltage category
Ⅲ
Pollution degree
2
Range
Calendar timer
*1
*1 Only AKW264100A
15-min.
instantaneous
value
Main unit: 85×140×65 mm 3.346×5.512×2.559 in
Expansion unit: 85×70×65 mm 3.346×2.756×2.559 in
Approx. 450 g (Main unit)
Approx. 200 g (Expansion unit)
Weight
Google Chrome
Mozilla Firefox
Safari
Google Chrome
Main unit memory specifications (for AKW264100A)
Display updating time cycle
Dimensions W/H/D
iOS *2
Android *2 Google Chrome
Black-and-white LCD with backlight (graphic form)
Sea level altitude
6 sessions
* Windows is the trademark of Microsoft Corporation in USA and other companies.
Google Chrome and Android are the trademarks of Google Inc.
Firefox is the trademark of Mozilla Foundation in USA and the other companies.
Safari and OS X are the trademark or the registered trademark of Apple Inc. of USA.
iOS is the trademark or the registered trademark of Cisco in USA ans the other companies.
*1 Use OS and browser with the latest version.
*2 System Web is not supported.
Display method
Power failure memory method
Max.demand, Monthly max. demand
(Latest 13 months)*2
*1 Only CH1 of main unit is available.
Only current transformer input is available for CH2 of main unit and expansion unit.
*2 Only AKW264100A
Write timing
Saved data
amount
Save cycle
Shock resistance
・IEC61557-12 Compliant demand
1. Sliding block interval demand
2. Fixed block interval demand
3. Current demand
30 to 85% RH (at 20℃ 68°F) with non-condensing
Between the isolated circuits: 2000 V/1 min
Breakdown voltage(initial)
Voltage
100 to 240V AC
30 A or less (240 V AC at 25℃)
Allowable momentary power-off time
0.2% *2
* Single-phase three-wire system 2 (N) phase current, three-phase
three-wire system 2 (S) phase current, 0.5%
Windows
Specifications
Inrush current
Current
0.000kWh to 9999.9PWh
Item
Nominal power consumption
Electrical power
0.000kWh ~ 9999.9PWh
General specifications
Rated frequency
Specification
0.5%
Active electric power Compliant Class 0.5S (IEC 62053-22) *1
Reactive electric power Compliant Class 2 (IEC 62053-23)
0.000kWh to 9999.9PWh
* The data display range is the numerical value range which can be displayed by the main unit's display
section and is not the allowable measurement range.
* If the voltage to be measured is not the rated (commercial) frequency, it may take time for THD (total
harmonic distortion) to stabilize.
* Please use this demand function as your standard.
The demand value calculated with this function is not guaranteed.
Supply voltage range
Item
Demand
January 1, 2015 00:00:00 to December 31, 2099 23:59:59
(leap year supported)
Time accuracy
Monthly accuracy max. 15 sec. (at 25°C)
Back up period
About 1 month
(by secondary battery *When power off after 48-hour or
more of power on time, at 23°C)
96 records for 1 file (for one-day) (Max. 60 days)
Write timing
15 minutes
All items excluding for harmonics and conversion
value for integral active power
Every hour xx:15:05 (fixed)
Saved data
amount
2976 records for 1 file (for one-month) (Max. 24
months)
Save cycle
1 minute
Present demand
(active power, reactive power, apparent power,
active power(export), reactive power(export))
Pulse conversion value for integral power,
Present current demand (1), (2), (3)
Every hour xx:25:05 (fixed)
Saved data
Write timing
Saved data
amount
Saved data
Power quality
5 minutes
R-current, S-current,T-current, N-current, Average of current
R-voltage (L1-N), S-voltage (L2-N), T-voltage (L3-N),
Average of phase-voltage,
RS-voltage (L1-L2), ST-voltage (L2-L3), TR-voltage (L3-L1)
Average of line-voltage
Pulse count value
Every hour xx:05:05 (fixed)
Write timing
Saved data
amount
1000 records for 1 file (Max. 100 files)
Power interruption, Over voltage, Under voltage, Over
current, Under current
(with time stamp of event occurrence and occurrence period)
Every hour xx:35:05 (fixed)
1000 records for 1 file (Max. 100 files)
Use safely and correctly after carefully reading the product specification manual, user manual, and operational instruction manual.
Communication specifications (for AKW263100A and AKW264100A)
〈RS485〉
Interface
Communication method
Synchronous system
Isolation status
Number of connected unit
Transmission distance
Transmission speed
Data length
Parity
Stop bit
〈Ethernet〉
Number of communication ports
Interface
Connector type
Transmission speed
Transmission
Transmission method
specifications
Max. segment length
Communication cable
Protocol (DNS, DHCP)
MEWTOCOL, MODBUS (RTU)
(select with setting mode)
Protocol
Transmission
format
Conforming to RS485
Half-duplex
Synchronous communication method
Isolated with the internal circuits
99 units (max.) *1
1,200 m 3,937 ft *2
115200, 57600, 38400, 19200, 9600, 4800, 2400 bps
(select with setting mode)
Setting, Monitoring measured values,
Web customization *2*3
Web server
8bit (fixed)
Not available / Odd number / Even number (select with setting mode)
1bit, 2bit (select with setting mode)
2
IEEE802.3u, 100BASE-TX / 10BASE-T
RJ45
100 Mbps / 10 Mbps
Base band
100m 328ft
UTP (category 5)
TCP/IP, UDP/IP
Auto-negotiation function *1
MDI/MDI-X auto-crossover function
Function
Dedicated communication
MEWTOCOL, MODBUS(TCP) (2 session for each)
*1 For RS485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE Co.,Ltd.). When using
SI-35, SI-35USB or PLC from our company (which can be connected up to 99 units), up to 99 can be connected. In case
using this system with the other devices, up to 31 can be connected.
*2 Please check with the actual devices when some commercial devices with RS485 interface are connected. The number of
connected devices, transmission distance, and transmission speed may be different according to using transmission line.
*Ethernet is the trademark of Xerox of USA.
*This product has the software developed by OpenSSL Project in order to use
OpenSSL Toolkit. (http://www.openssl.org/)
*1 It changes the transmission speed automatically with auto-negotiation function.
*2 Control Web Creator is necessary to customize the webpage.
*3 Only AKW264100A
Output specifications (for AKW263100A and AKW264100A)
Input specifications (for AKW263100A and AKW264100A)
Item
Specifications
Output points
Insulation method
Output type
Output capacity
Two channels * Non-insulated between channels
PhotoMOS relay
1a
100 mA, 30 V AC/DC
Output mode
・Pulse by integral power
・Output by alarm or events (set with setting mode)
Pulse Output by
integral power
Pulse width
Pulse output unit
Type
Alarm output
Event output
Item
Specifications
Input points
Insulation method
1 channel
Input dedicated insulation (insulated with other function terminals)
Connection point / non-voltage a contact or open
collector (operated by internal power source)
Input method
Input signal
・Impedance during short-circuit: 1 kΩ or less
Non-voltage
(short- circuit current, approx. 1 0 m A o r less)
input
・Residual voltage during short-circuit: 3 V or less
・Impedance while open: 100 kΩ or more
Input mode
Pulse input
Synchronized with input from outer device *1
Measure maintenance time *1
1 ms to 100 ms (set with setting mode)
0.001 kWh / 0.01 kWh / 0.1 kWh / 1 kWh /
10 kWh / 100 kWh
Stand-by alarm/ Under voltage alarm/ Over voltage alarm/
Power interruption alarm/ Under current alarm/
Over current alarm/ Active power alarm/ Reactive power alarm/
Apparent power alarm/ PF alarm/ Over frequency alarm/
Under frequency alarm/ Voltage harmonics alarm/
Current harmonics alarm/ Voltage THD alarm/
Current THD alarm/ Unbalanced voltage alarm/
Unbalanced current alarm/Power demand alarm/
Current demand alarm/ Counter output/
Level output (external control) / Time control *1
Maximum counting speed
2000 Hz / 30 Hz
0.25 ms (2000 Hz selected) / 16.7 ms (30 Hz selected)
ON : OFF ratio＝1:1
Minimum input signal width
Decimal point
Range
Output mode (during pulse output selection)
Protection element
Pre-scale setting
Alarm reset
Self-reset (according to the setting) / Manual-reset
Protection element
Varistor *2
Display
Lighting alarm mark
Alarm output
Output signal ・Normal: OFF・Alarm: ON
Output capacity 100 mA, 30 V AC/DC
Pulse
input
Up to three decimal points can be selected
0.001 to 100.000 (set with setting mode)
HOLD
Zener diode
Pulse input
1,000 to 99,000 pulse/kWh Arbitrary setting
(External pulse converter required)
Pulse rate
0.001 to 100.000 kWh/pulse
Pulse
input
condition
2000Hz
Pulse width
Pulse interval
0.25 ms or more
0.5 ms or more (OFF time 0.25 ms or more)
30Hz
Pulse width
Pulse interval
16.7 ms or more
33.4 ms or more (OFF time 16.7 ms or more)
Operation voltage / current 5 V DC 10 mA
*1 Only AKW264100A
*2 Varistor is mounted internal as a protection element.
Install a protective device in case of using at the place where it effects by surge.
*1 Only AKW264100A
■ Dimensions (unit: mm in)
Tolerance ± 1.0 ± 0.04
AKW272100A
Main unit
Hook: 2 points
Use these hooks when
connecting an expansion unit.
Connector label
Remove when
connecting an expansion unit.
140 5.512
Terminal cover
70 2.756
Terminal cover
(2.646)
20 0.787
DIN rail (sold separately)
45 1.772
(20 0.787)
35.4
1.394
48.8 1.921
65 2.559
(67.2) (with DIN rail)
85 3.346
20 0.787
DIN hook
Use these hooks when
connecting an expansion unit.
Hook: 2 points
Use these hooks when
connecting an expansion unit.
Connector label
Remove when
connecting an expansion unit.
DIN rail (sold separately)
45 1.772
(20 0.787)
85 3.346
Terminal cover
Expansion unit
35.4
1.394
AKW263100A / AKW264100A
Terminal cover
DIN hook
Use these hooks
when connecting
an expansion unit.
48.8 1.921
65 2.559
(67.2) (with DIN rail)
(2.646)
Electric power monitoring
■ Specifications
