Business > Industrial Devices > Automation Controls Top > FA Sensors & Components > Energy Management Solutions > Eco Series (Simple Watt-Hour Meter/ Simple Power-On Counter/ Power-On Hour Meter) > KW1M-R Eco-POWER METER > Rating/ Performance
Discontinued
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Item | Unit | Data display range | |
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Instantaneous electric power (Active) | kW | 0.00 to 9999.99 | |
Integrated electric power (Active) | kWh/MWh | 0.00 to 9999.99 MWh 0.00 to 9999999.99 kWh (when 9-digit display) |
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Current | R-current | A | 0.0 to 6000.0 |
S-current | A | 0.0 to 6000.0 | |
T-current | A | 0.0 to 6000.0 | |
Voltage | R (RS)-voltage | V | 0.0 to 9999.9 |
S (RT)-voltage | V | 0.0 to 9999.9 | |
T (TS)-voltage | V | 0.0 to 9999.9 | |
Electricity charge (Note 1) | - | 0.00 to 999999 | |
Conversion carbon dioxide value | kg-CO2 | 0.00 to 999999 | |
Power factor | - | 0.00 to 1.00 [Identify leading phase (–) or lagging phase] (Only in range of phase angle θ = –90° to +90°) |
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Frequency | - | 47.5 to 63.0 Hz | |
Hour meter | ON-time | h (Hour) | 0.0 to 99999.9 |
OFF-time | h (Hour) | 0.0 to 99999.9 | |
Pulse counter | - | 0 to 999999 |
Note 1: | Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing. |
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Item | Specifications | ||
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Rated operating voltage | 100-240V AC | ||
Rated frequency | 50/60Hz common | ||
Rated power consumption | AKW1000: 5VA, AKW1131: 8VA (240V AC at 25℃) |
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Inrush current | Max. 30A (240VAC at 25℃) | ||
Allowable operating voltage range |
85-264V AC (85% to 110% of rated operating voltage) | ||
Allowable momentary power-off time |
10ms | ||
Ambient temperature | -10 to +50℃ (-25℃ to +70℃ at storage) | ||
Ambient humidity | 30 to 85%RH (at 20℃ non-condensing) | ||
Breakdown voltage (initial) |
Between the isolated circuits: 2000V for 1min |
A)Outer edge (enclosure) - All terminals B)Between Insulated circuit <AKW1000> ・Operating power supply terminals - RS232C terminals ・Operating power supply terminals - RS485 terminals ・RS232C terminals - RS485 terminals <AKW1131> (Note 1) ・Operating power supply terminals - Analog input terminals ・Operating power supply terminals - Pulse input terminal ・RS485-All other terminals ・Pulse output terminals - All other terminals |
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Insulation resistance (initial) |
Between the isolated circuits: 100MΩor more (measured at 500V DC) |
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Vibration resistance | 10 to 55Hz (1cycle/min) single amplitude : 0.375mm(1h on 3 axes) | ||
Shock resistance | Min. 294m/s2 (5 times on 3 axes) | ||
Display method | LCD with backlight Upper: Green 4-digit, 16-segment, letters H: 6.5mm Lower: Amber 6-digit, 7-segment, letters H: 7.5mm |
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Power failure memory method |
AKW1000 | FROM(more than 100,000 overwrite) Memory items:Setting value, Error Log |
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AKW1131 | EEPROM (more than 1,000,000 overwrite) Memory items:Setting value, Measuring value |
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Size | 75 x 90 x 50 mm | ||
Weight | AKW1000: approx.160g AKW1131:approx.170g (Without antenna and battery) |
Note 1: | Analog input terminals: No.3, No.4, No.5 and No. 6 |
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Item | Specifications | |
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Phase and wire system | Single-phase two-wire system Single-phase three-wire system Three-phase three-wire system Three-phase four-wire system (common) |
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Input voltage |
Rating | Single-phase two-wire : 0-440V AC (Line voltage) Single-phase three-wire : 0-220V AC (Phase voltage) Three-phase three-wire : 0-440V AC (Line voltage) Three-phase four-wire : 0-254V AC (Phase voltage) |
Allowable measurement voltage |
Up to 120% of rated input voltage Single-phase two-wire : 0-528V AC (Line voltage) Single-phase three-wire : 0-264V AC (Phase voltage) Three-phase three-wire : 0-528V AC (Line voltage) Three-phase four-wire : 0-300V AC (Phase voltage) |
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VT ratio | 1.00 to 99.99 (Set with setting mode) *Voltage transformer (VT) is required when you measure a load with voltage over 440VAC (Allowable measurement voltage). *Secondary voltage rating of VT is 110V. |
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Input current |
Primary side rating |
<Using the dedicated CT> ・5A/50A/100A/250A/400A/600A (Select with setting mode) <Using a CT with the secondary side current 5A> ・1 to 4000A (Set with setting mode) *Use a CT with secondary side current of 5A when measure 600A or more. |
Special functions |
Cut-off current | 1.0 to 50.0%F.S (Set with setting mode) |
Cut-off voltage | Below 5% of rating voltage Special (Rating voltage x 0.05 x VT ratio) (Fixed) |
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Current threshold for hour meter |
1.0 to 100.0%F.S. | |
Accuracy (without error in CT and VT) |
Indication accuracy |
Instantaneous electric power / Integrated electric power / Electricity charge / Conversion value |
Within ± (2.0 % F.S. + 1 digit) (at 20 ℃, rated input, rated frequency, power factor 1) In case of 5 A CT mode, within ± (2.5 % F.S. + 1 digit) *Accuracy coverage: 5 to 100% of rated current |
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Current | ||
Within ± (1.0 % F.S. + 1 digit) In case of 5 A CT mode, within ± (2.5 % F.S. + 1 digit) (at 20 ℃ rated input, rated frequency, power factor 1) *Accuracy coverage: 5 to 100 % of rated current |
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Voltage | ||
Within ± (1.0 % F.S. + 1 digit) (at 20 ℃ rated input, rated frequency, power factor 1) |
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Hour meter | ||
±(0.01%+1digit) (at 20℃) Monthly accuracy: ±260 sec.(for your reference) [In case power on start or current energizing ±(0.01%+1s+1 digit) (at 20℃)] |
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Temperature characteristics |
Within ± (1.0 % F.S.+ 1 digit) In case of 5 A CT mode, within ± (1.5 % F.S. + 1 digit) (Range of -10 to 50 ℃, rated input, power factor 1) |
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Frequency characteristics |
Within ± (1.0 % F.S. + 1 digit) In case of 5 A CT mode, within ± (1.5 % F.S. + 1 digit) (Frequency change ± 5 % based on rated frequency, rated input, power factor 1) |
Item | Specifications | |
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Input mode | Addition (Fixed) | |
Max. counting speed | 2kHz /30Hz (Select with setting mode) | |
Pulse input | Min. input signal width: 0.25ms (When 2kHz selected) /16.7ms (When 30Hz selected) ON:OFF ratio = 1 : 1 |
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Input signal | Contact / No contact (open collector) ・Impedance when shorted: Min. 1kΩ ・Residual voltage when shorted: Max. 2V ・Impedance when open: Min. 100kΩ |
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Output mode | HOLD (Over count) | |
Prescale | Decimal point | under 3-digit |
Range | 0.001 to 100.000 (Set with setting mode) |
Item | Specifications |
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Number of output point | 1 point |
Insulation method | Optical coupler |
Output type | Open collector |
Output capacity | 100mA 30V DC |
Pulse width | approx. 100ms |
ON state voltage drop | 1.5V or less |
OFF state leakage current | 100μA or less |
Pulse output unit | 0.001/0.01/0.1/1/10/100kWh/Alarm(AL-P)/ Current alarm(AL-C) /Stand-by alarm (AL-S) /Counter(Cnt) (Selectable with setting mode) |
Note 1: | We recommend the setting of minimum unit for pulse output for measurement shown as below. |
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RS232C communication <only AKW1000>
Item | Specifications | |
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Interface | Conforming to RS232C | |
Protocol | MEWTOCOL/MODBUS(RTU) (Note 1) | |
Transmission distance | 15m (max.) | |
Transmission speed | 115200/57600/38400/19200/9600/4800/2400/1200bps (selectable with setting mode) |
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Transmission Format |
Data length | 8bit/7bit (selectable with setting mode) |
Parity | Not available / Odd number / Even number (selectable with setting mode) | |
Stop bit | 1bit (fixed) | |
Communication method | Half-duplex | |
Synchronous system | Synchronous communication method | |
Flow control | Available / Not available (selectable with setting mode) (Note 2) | |
Data buffer | Max.data size send/receive at one time ・MEWOCOL: 2048 byte ・MODBUS(RTU): 256 byte |
Note 1: | For 1:1 topology of AKW1000, it can communicate regardless the protocol. (Only communication between AKW1000 and AKW1000) |
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Note 2: | If flow control is executed, the other device needs to support flow control. |
RS485 communication
Item | Specifications | |
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Interface | Conforming to RS485 | |
Protocol | MEWTOCOL/MODBUS(RTU) (Note 5) (Note 6) | |
Isolation status | Isolated with the internal circuit | |
Number of connected units | 99 (max.) (Note 3) (Note 4) | |
Transmission distance | 1200m (max.) (Note 1) | |
Transmission speed |
AKW1000 | 115200/57600/38400/19200/9600/4800/2400/1200bps (selectable with setting mode) |
AKW1131 | 38400/19200/9600/4800/2400bps (selectable with setting mode) | |
Transmission Format |
Data length | 8bit/7bit (selectable with setting mode) (Note 4) |
Parity | Not available / Odd number / Even number (selectable with setting mode) | |
Stop bit | 1bit (fixed) | |
Communication method | Half-duplex | |
Synchronous system | Synchronous communication method | |
Ending resistancel | approx. 120Ω(built-in) | |
Data buffer | Max.data size send/receive at one time ・MEWOCOL: 2048 byte ・MODBUS(RTU): 256 byte (Note 7) |
Note 1: | 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. |
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Note 2: | For RS485 converter on the computer side, we recommend SI-35 and SI-35USB. (from LINE EYE Co., Ltd.) |
Note 3: | 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. |
Note 4: | With MODBUS (RTU) protocol, it works only with 8bit. |
Note 5: | For 1:1 topology of AKW1000, it can communicate regardless the protocol. (Only communication between AKW1000 and AKW1000) |
Note 6: | AKW1131 can’t be used for data communication from RS485. It may cause malfunctions. |
Note 7: | For AKW1131, the maximum number of reading points are 26 (57-byte), the maximum number of writing points is 23 (55-byte). |
Wireless communication
Item | Specifications |
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Wave type | Direct sequence spread spectrum (DS-SS) |
Transmission distance | Approx. 100m (straight, obstacle-free distance) |
Wave output | 1mW |
Frequency | 2405 to 2480 MHz |
Number of channel | 16 channels (selectable vacant channel automatically by auto scan function) |
Transmission speed | 250kbps |
Communication style | 1:N topology Auto routing method (N= max.249) |
Repeater function | 8 repeaters (between master and slave) (Note 1) |
Note 1: | There is no setting for letting it work as repeater, comfirm actual number of repeaters by KW Network Monitor. |
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■Frequency
There are 16 channels of communication channel with 5MHz separation.
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Use the transmission cables shown below for Eco-POWER METER RS485 communication system.
Cable | Conductor | Insulator | Cable diameter |
Applicable cable | ||
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Size | Resistance (at 20℃) |
Material | Thickness | |||
Twisted-pair with shield |
1.25 mm2 (AWG16) or more |
Max.16.8Ω/km | Polyethylene | Max. 0.5 mm | Approx. 8.5 mm |
HITACHI KPEV-S 1.25 mm2 x 1P Twisted- Belden Inc. 9860 |
0.5 mm2 (AWG20) or more |
Max.33.4Ω/km | Polyethylene | Max. 0.5 mm | Approx. 7.8 mm |
HITACHI KPEV-S 0.5 mm2 x 1P Belden Inc. 9207 |
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VCTF | 0.75 mm2 (AWG18) or more |
Max.25.1Ω/km | PVC | Max. 0.6 mm | Approx. 6.6 mm |
VCTF 0.75 mm2 x 2C (JIS) |
Cable | Twisted-pair with shield | VCTF |
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Section |
Note 1: | Use shielded type twist cables. |
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Note 2: | Use only one type of the transmission cables. Do not mix different types of the cables. |
Note 3: | Use twist pair cables under a bad noise environment. |
Item | Specifications |
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Calendar timer | Time accuracy (Monthly accuracy) ±240 seconds (at -10℃) ±70 seconds (at 25℃) ±240 seconds (at 50℃) |
Backup contents by battery | Time measurement |
Battery life (Note 1) | About 2 years (at 25℃) (when no power) |
Note 1: | When battery power is reduced,”BATT” is blinking. Replace battery according to the procedures. Battery life will be shorten if using this under high-temperature. |
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