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KW2G-H Eco-POWER METER

Rating/ Performance

Measurement items
Power measurement (for AKW2010GB, AKW2020GB, AKW2110GB and AKW2160GB)

Item Unit Data display range
Integrated electric power (Active)*1 kWh/MWh 0.00 to 9999.99 kWh to 9999.99 MWh, 0.00 to 9999999.99 kWh (when 9-digit display)
Instantaneous
electric power
Active*2 kW −9999.99 to 0.000 to 9999.99
Reactive*2 kvar −9999.99 to 0.00 to 9999.99
Apparent kVA 0.00 to 9999.99
Current R-current A 0.000 to 6000.00
N/S-current A 0.000 to 6000.00 (calculated value)
T-current A 0.000 to 6000.00
Voltage R (RS)-voltage V 0.0 to 9999.9
S (RT)-voltage V 0.0 to 9999.9 (calculated value)
T (TS)-voltage V 0.0 to 9999.9
Electricity charge*3 0.00 to 999999
Conversion carbon
dioxide value
kg-CO2 0.00 to 999999
Power factor*2 Displayed on
the main unit
−1.00 to 1.00 (without identify leading phase and lagging phase)
Frequency Hz 47.5 to 63.0
Pulse counter*4 0 to 999999

*1 KW2G / KW2G-H can measure regeneration electric power. Integrated electrical power is not integrated (not subtracted) when detecting regeneration electric power.
*2 While detecting regeneration electric power, minus is displayed on instantaneous active electric power and power factor.
*3 Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing.
*4 Displayed digit of pulse counter differs according to the pre-scale set by pre-scale setting mode.

Pulse input (for AKW2152G)

Item Data display range
Pulse counter value* 0 to 999999

* The number of displayed digit of pulse count value differs according to the pre-scale set by pre-scale setting mode.

Analog input (for AKW2182G)

Item Data display range
Converted digital value* −999999 to 9999999

* The number of displayed digits of the converted digital values differs according to the preset decimal point position.

Hour Meter (excluding AKW2182G)

Item Unit Data display range
OFF-time*1 h(Hour) 0.0 to 99999.9
ON-time1*1
ON-time2*1
Maintenance-time*2
Actual-hours
Rate of ON-time1*1 % 0.0 to 100.0
Rate of ON-time2*1
*1 Excluding AKW2152G
*2 Maintenance time by using pulse input cannot be measured with AKW2110GB or AKW2160GB
*3 Hour meter function can be used only with main unit and one expansion unit.

Accuracy (for AKW2010GB, AKW2020GB, AKW2110GB and AKW2160GB)

Item Specifications
Accuracy
(without error
in CT and VT)
Instantaneous electric power,
Integrated electric power,
Electricity charge and
Conversion value
Within ± (2.0 % F.S. + 1 digit)
(at +20 ℃ +68 , rated input, rated frequency, power factor 1)
*Accuracy coverage: 10 to 100 % of rated current
Current Within ± (1.0 % F.S. + 1 digit)
(at +20 ℃ +68 , rated input, rated frequency, power factor 1)
*Accuracy coverage: 10 to 100 % of rated current
Voltage Within ± (1.0 % F.S. + 1 digit)
(at +20 ℃ +68 , rated input, rated frequency, power factor 1)
Temperature characteristics Within ± (1.0 % F.S. + 1 digit)
(Range of -10 to +50 ℃ +14 to +122, rated input, power factor 1)
Hour meter ±(0.01% +1 digit) Monthly accuracy: ±280 sec. (at +20℃ +68℉)
Frequency characteristics Within ± (1.0 % F.S. + 1 digit)
(Frequency change ± 5 % based on rated frequency, rated input, power factor 1)

General specifications

Item Specifications
Rated operating voltage 100 to 240 V AC (Add to main unit)
Rated frequency 50 / 60 Hz common
Rated power consumption Main unit: 6 VA, Expansion unit (Power measurement, Power measurement and Pulse output, and Analog input): 0.5 VA / unit, Expansion unit (Pulse input): 1.0 VA /unit (240 V AC at +25 ℃ +77 )
Allowable operating voltage range 85 to 264 V AC (85 % to 110 % of rated operating voltage)
Allowable momentary power-off time 10 ms
Ambient temperature -10 to +50 ℃ +14 to +122 (-25 to +70 ℃ -13 to +158 at storage)
Ambient humidity 30 to 85 % RH (at +20 ℃ +68 ) non-condensing
Display method LCD with backlight (green), Upper: 5-digit (7-segment 1-digit + 16-segment 4-digit), Lower: 6-digit (7-segment)
Number of connectable expansion units Max. 7 units
Power failure memory method EEPROM (more than 1,000,000 overwrite), Memory items: setting value and integral measuring value
Weight Main unit (Standard type): 180 g approx.
Main unit (SD card type): 185 g approx.
Expansion unit (Power measurement): 80 g approx.
Expansion unit (Power measurement and Pulse output, Pulse input and Analog input): 85 g approx.

Memory specifications of main unit (for AKW2020GB)

Item Specifications
Logging functions File type 1
(instantaneous value)
*1
Save
cycle
15 min (00 hr. 00 min 00 sec after the day) (fixed)
Saved
data
(Instantaneous value) Integrated electric power (1) (2), Instantaneous active electric power (1) (2), Instantaneous reactive electric power (1) (2), Instantaneous apparent electric power (1) (2), R-current (1), R (T)-current (2), S (N)-current, R/RS-voltage (1), R (T/TS)-voltage (2), RT-voltage, Power factor (1) (2), Frequency, Count value, Converted digital value for CH0, Converted digital value for CH1, Pulse count value for CH0 and Pulse count value for CH1
Saved
data
amount
96 records per file (max. approx. 8 days worth of data)
File type 2
(difference value)
*1
Save
cycle
15 min (00 hr. 00 min 00 sec after the day) (fixed)
Saved
data
(Difference value) Integrated electric power (1) (2), Count value, Pulse count value for CH0 and Pulse count value for CH1
Saved
data
amount
96 records per file (max. approx. 8 days worth of data)
File type 3
(instantaneous
value detail)
*1
Save
cycle
Select among 1 min, 5 min, 10 min, 15 min, 30 min, or 60 min
(Saved timing)
When 1 min is selected: 00 sec after the minute
When 10 min is selected: 00, 10, 20, 30, 40, 50 min after the hour
When 60 min is selected: 00 min after the hour
When 5 min is selected: 00, 05, 10, 15, 20, 25, 30... min after the hour
When 15 min is selected: 00, 15, 30, 45 min after the hour
Saved
data
Integrated electric power (1) (2), Instantaneous active electric power (1) (2), Instantaneous reactive electric power (1) (2), Instantaneous apparent electric power (1) (2), R-current (1), R (T)-current (2), S (N)-current, R/RS-voltage (1), R (T/TS)-voltage (2), RT-voltage, Power factor (1) (2), Frequency, Count value, Converted digital value for CH0, Converted digital value for CH1, Pulse count value for CH0 and Pulse count value for CH1
Saved
data
amount
Max. 720 records, 12 hours approx. worth of data (when the save cycle is set to one minute)
Main unit display Integrated electric power by day (latest data covering 8 days period) / Integrated electric power by hour (latest data covering 12 hours period)
Calendar timer function Time accuracy Monthly accuracy: ±30 sec (at +25 ℃ +77 )
Content of battery backup Time measurement and Log data
Battery life*2 2 years approx. (at +25 ℃ +77 , in power-off state)

*1 Using the setting mode, you can select whether or not to write to the SD memory card for each of file types 1, 2, and 3. Files can be created for each unit.
*2 When the battery gets low, the BATT display will start flashing. Please replace the battery in accordance with the battery replacing procedure. Also, battery life will be shortened if the main unit is used in a high temperature environment.
* While measuring, data is collected in the memory of main unit. If, while measuring, the memory capacity of main unit is reached, data will be overwritten in succession starting from the oldest data. Initialization of the main unit memory is possible.

External memory specifications (for AKW2020GB)
<SD memory card slot>

Item Specifications
Support media SD memory card*1
Supported format standards SD / SDHC standard conformance

*1Please use the SLC type SD memory card.
*UHS standard SDHC memory cards are not supported.
Log data may not be written to the SD memory card if an SD memory card without operational confirmation is used.
*The use of UPS (Uninterruptible Power Supply) is recommended because data damage may occur in case of instant power failure during writing.
*Refer to the user manual regarding SD memory card handling.

<Precautions when handling the SD memory card>
Data saved to the SD memory card may be lost in the following cases. Be aware that Panasonic Industrial Devices SUNX Co., Ltd. assumes no responsibility for any loss or direct / indirect damage of registered data.

1) If the SD memory card is misused by the customer or a third party
2) If the SD memory card is effected by electrostatic / electronic noise
3) If the card is removed or the main unit is turned OFF while the main unit SD memory card access LED is flashing (reading data).

* It is recommended to save important data to other media and always perform backup.

Communication specifications

Item Specifications
RS-485 communication USB communication*5
Protocol MEWTOCOL / Modbus RTU (selectable with setting mode) -
Transmission function - Computer link (MEWTOCOL)
Isolation status Isolated with the internal circuit Isolated with the internal circuit
Number of connected units 99 units Max.*1*2 -
Transmission distance 1200 m 3.937 ft Max.*3 -
Transmission speed 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps
(selectable with setting mode)
12 Mbps (Full-speed)
Transmission format Data length: 8-bit / 7-bit (selectable with setting mode)*4
Parity: Not available / Odd number / Even number (selectable with setting mode)
Stop bit: 1-bit / 2-bit (selectable with setting mode)
-
Communication method Half-duplex -
Synchronous system Synchronous communication method -
Ending resistance 120 Ω approx. (built-in) -
*1 For RS-485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE Co.,Ltd.).
*2 When using SI-35, SI-35USB or PLC from our company (which can be connected up to 99 units), up to 99 Eco-POWER METER can be connected.
In case using this system with the other devices, up to 31 Eco-POWER METER can be connected.
*3 Please check with the actual devices when some commercial devices with RS-485 interface are connected. The number of connected devices, transmission distance, and transmission speed may be different according to using transmission line.
*4 With Modbus RTU protocol, it works only with 8-bit.
*5 When using the USB port, install the dedicated USB driver.

Pulse input specifications (for AKW2010GB, AKW2020GB and AKW2152G)

Item Specifications
Input mode Addition (Fixed)
Max. counting speed 50 kHz / 30 Hz (Select with setting mode)
Pulse input
(Min. input signal width)
0.01 ms (When 50 kHz selected) /
16.7 ms (When 30 Hz selected),
ON : OFF ratio = 1 : 1
Input signal Contact / No contact (open collector)
• Impedance when shorted: Max. 1 kΩ
• Residual voltage when shorted: Max. 2 V
• Impedance when open: Min. 100 kΩ
Output mode HOLD (Over count)
Prescale Decimal
point
Setting possible up to under 3-digit
Range 0.001 to 100.000 (Set with setting mode)

Analog input specifications (for AKW2182G)

Item Specifications
Number of input points 2 channels
Input range (Select with setting mode) Voltage 0 to 5 V / 1 to 5 V
Current 0 to 20 mA / 4 to 20 mA
Converted digital value 0 to 4000 (decimal number)*
Resolution 1/4000 (12 bits)
Overall precision ±1 % F.S. or less (-10 to 55 ℃ +14 to 131 )
Input impedance Voltage 440 kΩ
Current 125 Ω
Absolute maximum input Voltage - 0.3 to +10 V
Current - 2 to + 30 mA
Input protection Diode

* Digital conversion value differs according to the scaling conversion value set by setting mode.
If the analog input value exceeds the upper or lower limit, the digital value will preserve the upper or lower limit.

Pulse output (Transistor output) specifications
(for AKW2010GB, AKW2020GB and AKW2160GB)

Item Specifications
Number of output point 1 point
Insulation method Photo coupler
Output type /
Output capacity
Open collector / 100 mA 30 V DC
Pulse width
(when pulse output with
integrated active
electric power selected)
1 to 100 ms (selectable with setting mode)
ON state voltage drop 1.5 V or less
OFF state leakage current 100 μA or less
Pulse output unit*1 0.001 kWh, 0.01 kWh, 0.1 kWh, 1 kWh, 10 kWh, 100 kWh / Power alarm(AL-P) / Current alarm(AL-C) / Stand-by power alarm(AL-S) / Counter(Cnt) / General purpose output(OUT) / Error alarm(Error)
(selectable with setting mode)
General purpose output Level output / Repeat cycle output / One-shot output
(selectable with setting mode)
Output ON-time,
Output OFF-time
0.1 to 10.0 sec. (selectable with setting mode)
*1 General-purpose output (OUT) and Error alarm (Error) are possible using main unit software AKW2010GB Ver. 1.05 or later and AKW2020GB Ver. 1.02 or later and expansion unit software AKW2160GB Ver.1.01 or later.
*2 For normal operation of other functions, to switch on minimal pulse width of 1 to 10 ms, the maximum pulse output interval is 25 ms.
Consequently, a minimum measurable pulse unit output setting of 40 pulses or less per 1 second is recommended.

[How to calculate]
Unit for pulse output: PL-P > Max. measurement power (kW) / 3,600 sec × 40 pulse/sec
When the pulse output unit is 0.001, the maximum power that can be properly measured by pulse output is 144 kW (3,600 sec × 40 pulse/sec × 0.001).

Note:

(1) Count errors may occur if the pulse output is set to 40 pulses or more per 1 second.
(2) If the pulse output OFF time is set too short, count errors by connected counters, PLCs (Programmable Logic Controllers) may occur.
*3 These count output specifications are only for the main unit.

<SD memory card handling precautions>
To format SD memory cards, please download and use the formatting software available on the Panasonic website.open new window
The file system on a SD memory card that was formatted using standard PC software does not comply with the SD memory card standard.

Data saved on an SD memory card may be lost in the following cases. Please note that Panasonic Industrial Devices SUNX is not responsible for any losses of recorded data and other direct and indirect damages.
1) When a customer or a third party incorrectly uses the SD memory card
2) When the SD memory card is affected by static electricity or electrical noise
3) When the SD memory card is taken out or the power is turned off while the SD memory card access LED of the unit is flashing (during data writing)
* It is recommended that you constantly back up important data to another medium.

We recommend using this Eco-POWER METER with inserting SD memory card.
If it is not inserted, log data for 8 days will be saved in the internal memory.

We recommend that move or delete logging data in the folder created by KW2G-H regularly (every 1-month). When inserting SD memory card, delete the logging data in the folder created by KW2G-H.

When you turn off the Eco-POWER METER, remove the SD memory card first. If not, it might damage the Eco-POWER METER and SD memory card.

When you turn on the power again, it may access to SD memory card for 25 minutes according to the log data in the internal memory.

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