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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

KW1M-R Eco-POWER METER

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Discontinued

	March 31, 2013

Rating/ Performance

Rating/ Performance

MEASUREMENT ITEMS

Item		Unit	Data display range
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)
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°)
Frequency		-	47.5 to 63.0 Hz
Hour meter	ON-time	h (Hour)	0.0 to 99999.9
Hour meter	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.

Note 1:	Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing.

SPECIFICATIONS

Main unit specifications

Item		Specifications
Rated operating voltage		100-240V AC
Rated frequency		50/60Hz common
Rated power consumption		AKW1000: 5VA, AKW1131: 8VA (240V AC at 25℃)
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
Insulation resistance (initial)		Between the isolated circuits: 100MΩor more (measured at 500V DC)
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
Power failure memory method	AKW1000	FROM(more than 100,000 overwrite) Memory items:Setting value, Error Log
Power failure memory method	AKW1131	EEPROM (more than 1,000,000 overwrite) Memory items:Setting value, Measuring value
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

Note 1:	Analog input terminals: No.3, No.4, No.5 and No. 6

Electric power input specifications <only AKW1131>

Item		Specifications
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)
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)
	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.
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)
	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
		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
		Voltage
		Within ± (1.0 % F.S. + 1 digit) (at 20 ℃ rated input, rated frequency, power factor 1)
		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℃)]
	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)
	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)

Pulse input specifications (only AKW1131)

Item		Specifications
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
Input signal		Contact / No contact (open collector) ・Impedance when shorted: Min. 1kΩ ・Residual voltage when shorted: Max. 2V ・Impedance when open: Min. 100kΩ
Output mode		HOLD (Over count)
Prescale	Decimal point	under 3-digit
Prescale	Range	0.001 to 100.000 (Set with setting mode)

Pulse output specifications (Transistor output) <only AKW1131>

Item	Specifications
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.

Output pulse: 4 pulses or less per 1sec
Count errors may occur if pulse output unit is set so that 4 or more pulses are output per 1 second.
- How to calculate -
Unit for pulse output: PL-P > Max. measurement power (kW) / 3,600 sec × 4 pulse/sec

Note 1:	We recommend the setting of minimum unit for pulse output for measurement shown as below.

Communication specifications

RS232C communication <only AKW1000>

Item		Specifications
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)
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)

Note 2: If flow control is executed, the other device needs to support flow control.

Note 1:	For 1:1 topology of AKW1000, it can communicate regardless the protocol. (Only communication between AKW1000 and AKW1000)
Note 2:	If flow control is executed, the other device needs to support flow control.

RS485 communication

Item		Specifications
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)
Transmission speed	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.

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).

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.
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
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.

Note 1:	There is no setting for letting it work as repeater, comfirm actual number of repeaters by KW Network Monitor.

■Frequency
There are 16 channels of communication channel with 5MHz separation.

Communication channel	Frequency
AUTO	Auto selection from 2405 to 2480MHz
1ch	2405MHz
2ch	2410MHz
3ch	2415MHz
4ch	2420MHz
5ch	2425MHz
6ch	2430MHz
7ch	2435MHz
8ch	2440MHz
9ch	2445MHz
10ch	2450MHz
11ch	2455MHz
12ch	2460MHz
13ch	2465MHz
14ch	2470MHz
15ch	2475MHz
16ch	2480MHz

Recommended Cable

Use the transmission cables shown below for Eco-POWER METER RS485 communication system.

Cable	Conductor		Insulator		Cable diameter	Applicable cable
Cable	Size	Resistance (at 20℃）	Material	Thickness	Cable diameter	Applicable cable
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 mm²x 1P Twisted- Belden Inc. 9860
Twisted-pair with shield	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
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
Section

Note 1: Use shielded type twist cables.

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.

Note 1:	Use shielded type twist cables.
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.

Calendar timer specifications <only AKW1000/AKW1000>

Item	Specifications
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.

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.

Rating/ Performance

If you have any questions, please select the option below to contact us or find answers.