AKW2020GB | KW2G-H Eco-Power Meter(Discontinued)

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Spec Detail As of September 29, 2023

Item	Specifications
Product Number	AKW2020GB
Part Number	AKW2020GB

Measurement items Power measurement

Item	Specifications
Integrated electric power(Active):kWh/MWh	0.00 to 9999.99 kWh to 9999.99 MWh, 0.00 to 9999999.99 kWh (when 9-digit display) (Note):measure regeneration electric power. Integrated electrical power is not integrated (not subtracted) when detecting regeneration electric power.
Power measurement:Instantaneous electric power:Active:kW	-9999.99 to 0.000 to 9999.99 (Note):While detecting regeneration electric power, minus is displayed on instantaneous active electric power and power factor.
Instantaneous electric power:Reactive:kvar	-9999.99 to 0.00 to 9999.99 (Note):While detecting regeneration electric power, minus is displayed on instantaneous active electric power and power factor.
Instantaneous electric power:Apparent:kVA	0.00 to 9999.99
Current:R-current:A	0.000 to 6000.00
Current:N/S-current:A	0.000 to 6000.00 (calculated value)
Current:T-current:A	0.000 to 6000.00
Voltage:R(RS)-voltage:V	0.0 to 9999.9
Voltage:S(RT)-voltage:V	0.0 to 9999.9 (calculated value)
Voltage:T(TS)-voltage:V	0.0 to 9999.9
Electricity charge	0.00 to 999999
Conversion carbon dioxide value:kg-CO2	0.00 to 999999
Power factor:Displayed on the main unit	-1.00 to 1.00 (without identify leading phase and lagging phase) (Note):While detecting regeneration electric power, minus is displayed on instantaneous active electric power and power factor.
Frequency:Hz	47.5 to 63.0
Pulse count value	0 to 999999 (Note):Displayed digit of pulse counter differs according to the pre-scale set by pre-scale setting mode.

Measurement items Hour Meter

Item	Specifications
OFF-time:Hour	0 to 99999.9
ON-time 1:Hour	0 to 99999.9
ON-time 2:Hour	0 to 99999.9
Maintenance time:Hour	0 to 99999.9 (Note):Maintenance time by using pulse input cannot be measured
Actual work time:Hour	0 to 99999.9
Ratio of ON-time 1:%	0.0 to 100.0
Ratio of ON-time 2:%	0.0 to 100.0

Accuracy

Item	Specifications
Accuracy (without error in CT and VT) : Integrated electric power and Instantaneous electric power	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
Accuracy (without error in CT and VT) : 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
Accuracy (without error in CT and VT) : Voltage	Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉, rated input, rated frequency, power factor 1)
Accuracy (without error in CT and VT) : Temperature characteristics	Within ± (1.0 % F.S. + 1 digit) (Range of -10 to +50 ℃ +14 to +122℉, rated input, power factor 1)
Accuracy (without error in CT and VT) : Hour meter	±(0.01% +1 digit) Monthly accuracy: ±280 sec. (at +20℃ +68℉)
Accuracy (without error in CT and VT) : 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	100-240V 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	85-264 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 memory 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

Item	Specifications
Logging functions : File type 1 (instantaneous value) : Save cycle	15 min (00 hr. 00 min 00 sec after the day)(fixed) (Note): 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh.
Logging functions : File type 1 (instantaneous value) : Saved data	(Instantaneous value) Integrated electric power ①②, Instantaneous active electric power ①②, Instantaneous reactive electric power ①②, Instantaneous apparent electric power ①②, R-current ①, R (T)-current ②, S (N)-current, R/RS-voltage ①, R (T/TS)-voltage ②, RT-voltage, Power factor ①②, Frequency, Count value, Converted digital value for CH0, Converted digital value for CH1, Pulse count value for CH0 and Pulse count value for CH1 (Note 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh. (Note 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.
Logging functions : File type 1 (instantaneous value) : Saved data amount	96 records per file (max. approx. 8 days worth of data) (Note): 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh.
Logging functions : File type 2 (difference value) : Save cycle	15 min (00 hr. 00 min 00 sec after the day)(fixed) (Note): 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh.
Logging functions : File type 2 (difference value) : Saved data	(Difference value) Integrated electric power (1)(2), Count value, Pulse count value for CH0 and Pulse count value for CH1 (Note 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh. (Note 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.
Logging functions : File type 2 (difference value) : Saved data amount	96 records per file (max. approx. 8 days worth of data) (Note): 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh.
Logging functions :File type 3 (instantaneous value detail) : 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 minuteWhen 10 min is selected: 00, 10, 20, 30, 40, 50 min after the hourWhen 60 min is selected: 00 min after the hourWhen 5 min is selected: 00, 05, 10, 15, 20, 25, 30... min after the hourWhen 15 min is selected: 00, 15, 30, 45 min after the hour (Note): 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh.
Logging functions :File type 3 (instantaneous value detail) : Saved data	Integrated electric power ①②, Instantaneous active electric power ①②, Instantaneous reactive electric power ①②, Instantaneous apparent electric power ①②, R-current ①, R (T)-current ②, S (N)-current, R/RS-voltage ①, R (T/TS)-voltage ②, RT-voltage, Power factor ①②, Frequency, Count value, Converted digital value for CH0, Converted digital value for CH1, Pulse count value for CH0 and Pulse count value for CH1 (Note 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh. (Note 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.
Logging functions :File type 3 (instantaneous value detail) : Saved data amount	Max. 720 records, 12 hours approx. worth of data (when the save cycle is set to one minute) (Note): 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. 'Integrated electric power' is logged with the unit of 0.01kWh.It doesn't log it with the unit of 0.001kWh.
Logging functions : 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 years approx. (at +25 ℃ +77 ℉, in power-off state) (Note): 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. * 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.

External memory specifications (SD memory card slot)

Item	Specifications
Support media	SD memory card (Note): Panasonic buisiness-use SD memory card is recommended.
Supported format standards	SD / SDHC standard conformance
Remark	* 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 US memory card handling. 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(RS-485 communication)

Item	Specifications
Protocol	MEWTOCOL / Modbus RTU(selectable with setting mode)
Transmission function	-
Isolation status	Isolated with the internal circuit
Number of connected units	99 units max. (Note 1): For RS-485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE Co.,Ltd.). (Note 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.
Transmission distance	1200 m 3.937 ft max. (Note): 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.
Transmission speed	2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps (selectable with setting mode)
Transmission format	Data length: 8-bit / 7-bit (selectable with setting mode)(Note) Parity: Not available / Odd number / Even number (selectable with setting mode) Stop bit: 1-bit / 2-bit (selectable with setting mode) (Note):With Modbus RTU protocol, it works only with 8-bit.
Communication method	Half-duplex
Synchronous system	Synchronous communication method
Ending resistance	120 Ω approx. (built-in)

Communication specifications(USB communication)

Item	Specifications
Protocol	－
Transmission function	Computer link (MEWTOCOL)
Isolation status	Isolated with the internal circuit
Number of connected units	－
Transmission distance	－
Transmission speed	12 Mbps (Full-speed)
Transmission format	－
Communication method	－
Synchronous system	－
Ending resistance	－
Remark	When using the USB port, install the dedicated USB driver.

Pulse input specifications

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
Prescale : Range	0.001 to 100.000 (Set with setting mode)

Analog input specifications

Item	Specifications
Number of input points	2 channels
Input range (Select with setting mode) : Voltage	0 to 5 V / 1 to 5 V (selectable with setting mode)
Input range (Select with setting mode) : Current	0 to 20 mA / 4 to 20 mA (selectable with setting mode)
Converted digital value	0 to 4,000 (decimal number) (Note):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.
Resolution	1/4,000 (12 bits)
Overall precision	±1 % F.S. or less (-10 to +55℃ +14 to 131℉)
Input impedance : Voltage	440 kΩ
Input impedance : Current	125 Ω
Absolute maximum input : Voltage	- 0.3 to +10 V
Absolute maximum input : Current	- 2 to + 30 mA
Input protection	Diode

Pulse output (Transistor output) specifications

Item	Specifications
Number of output point	1 point
Insulation method	Optical 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) (Note) : The min. pulse output cycle is 25ms in order to work correctly and output 1 to 10ms pulse output.
ON state voltage drop	1.5 V or less
OFF state leakage current	100 μA or less
Pulse output unit	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)(Note 3) / General purpose output(OUT) / Error alarm(Error) (Note 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. (Note 2) : The min. pulse output cycle is 25ms in order to work correctly and output 1 to 10ms pulse output. (Note 3) : These count output specifications are only for the main unit and expansion unit AKW2160GB.
General purpose output	Level output / Repeat cycle output / One-shot output (Selectable with setting mode) (Note): In order to use the general purpose output, it is necessary to set the output status ON or OFF via communications. In addition it doesn't work with the on-time and off-time set to under 0.1s.
Output ON-time, Output OFF-time	0.1 to 10.0s (Selectable with setting mode)

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Accessories (Option) As of September 29, 2023

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