KM1 Series

Multi-circuit Smart Power Monitor for back panel application

The KM1 platform enables the visualization of power consumption for back panel applications utilizing a master-slave concept. Up to four slave units can be connected to a master unit for simultaneous measurement of electric and non-electric parameters.

Installation time consistently reduced.
Mounting space reduced up to 24% compared to traditional monitoring products.
Reduced number of devices: one platform can measure up to 36 circuits.
Wiring reduced due to high speed innerbus communication and the power supply voltage from the master.
Customizable platform for any applications
Integrated Energy classification due to customizable internal thresholds
High precision measurements even for currents below 5% of the nominal value.
No VT required / Up to 7 pulse inputs accepted to collect also non electrical information
Equipped with temperature input
Free configuration tool KM//KE1 settings
Dual system monitoring with one unit

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Specifications & ordering info

Ordering information

Smart power monitors

Unit type	Unit category	Power supply voltage	Communications	Order code
Dual power system measurement unit	Measurement master	100 to 240 VAC	RS-485	KM1-PMU2A-FLK
Power measurement unit	Measurement master			KM1-PMU1A-FLK
Pulse/temperature input unit	Function slave			KM1-EMU8A-FLK
CT extension unit	CT extension slave	Power supplied from the measurement master unit	-	KE1-CTD8E
DeviceNet communications unit	Communications slave	100 to 240 VAC	RS-485 or DeviceNet	KE1-DRT-FLK

Options (Order separately)

Separate or In-panel current transformer (CT)

Rated primary current	Rated secondary current	Installation	Order code
5 A	Special output	Installed separately	KM20-CTF-5A
50 A			KM20-CTF-50A
100 A			KM20-CTF-100A
200 A			KM20-CTF-200A
400 A			KM20-CTF-400A
600 A			KM20-CTF-600A
5 A/50 A		In-panel (penetration type)	KM20-CTB-5A/50A

Note: CT cables are not included with the CTs.

Current transformer (CT) cable

Specification	Order code
3-m cable	KM20-CTF-CB3

Note: Use the CT cable specified by OMRON or one manufactured by JST Mfg. Co.
You can also use a 1.25-B3A crimping terminal or AWG22 power cable.

Related devices (Sold separately)

Communications interface converter

Dimensions (mm)	Communications conversion	Power supply voltage	Order code
30 × 80 × 78 (W×H×D)	RS-232C, USB <-> Half-duplex RS-485	100 to 240 VAC	K3SC-10 AC100-240
30 × 80 × 78 (W×H×D)	RS-232C, USB <-> Half-duplex RS-485	24 VAC/DC	K3SC-10 AC/DC24

Specifications

Ratings

Item		Master unit		Slave unit
Item		KM1-PMU2A-FLK (Dual power systems)	KM1-PMU1A-FLK (Single power system)	KM1-EMU8A-FLK (Pulses/temperatures)	KE1-CTD8E (CT extension unit)
Applicable phase wiring method		Single-phase two wire, single-phase three wire and three-phase three wire	Single-phase two wire, single-phase three wire, three-phase three wire and three-phase four wire	-	Single-phase two wire, single-phase three wire, three-phase three wire and three-phase four wire
Maximum number of CT connections		4	3	-	8
Selectable types of CT capacities		2 types	1 type	-	Two types per Slave Unit
Power supply	Rated power supply voltage	100 to 240 VAC, 50/60 Hz			-
	Allowable supply voltage range	85% to 110% of rated power supply voltage			-
	Power supply allowable frequency range	45 to 65 Hz			-
	Power consumption	Standalone: 10 VA max., Maximum expansion: 14 VA max.		10 VA max.	-
Input	Rated input voltage	100 to 480 VAC (single-phase, 2-wire): Line voltage 100/200 VAC (single-phase, 3-wire): Phase voltage/line voltage 100 to 480 VAC (3-phase, 3-wire): Line voltage	100 to 480 VAC (single-phase, 2-wire): Line voltage 100/200 VAC (single-phase, 3-wire): Phase voltage/line voltage 100 to 480 VAC (3-phase, 3-wire): Line voltage 58 to 277 VAC (3-phase, 4-wire): Phase voltage	-
	Rated input current (CT)	(5, 50, 100, 200, 400, or 600 A)		-	(5, 50, 100, 200, 400, or 600 A)
	Rated input power	With 5-A CT: 4 kW With 50-A CT: 40 kW With 100-A CT: 80 kW With 200-A CT: 160 kW With 400-A CT: 320 kW With 600-A CT: 480 kW		-
	Rated input frequency	50/60 Hz			-
	Allowable input frequency range	45 to 65 Hz			-
	Allowable input voltage	110% of rated input voltage (continuous)		-
	Allowable input current	120% of rated input current (continuous)		-	120% of rated input current (continuous)
Ambient operating temperature		−10 to 55°C (with no condensation or icing)
Storage temperature		−25 to 65°C (with no condensation or icing)
Ambient operating humidity		25% to 85%
Storage humidity		25% to 85%
Altitude		2,000 m max.

Performance

Item		Master unit		Slave unit
Item		KM1-PMU2A-FLK (Dual power systems)	KM1-PMU1A-FLK (Single power system)	KM1-EMU8A-FLK (Pulses/temperatures)	KE1-CTD8E (CT extension unit)
Accuracy1	Voltage	±1.0% FS, ±1 digit; or, ±2.0% FS, ±1 digit for voltage across Vtr under the same conditions		-
	Current	±1.0% FS, ±1 digit However, the accuracy is ±2.0% FS, ±1 digit for the phase-S current for a three-phase, three wire circuit and the phase-N current for a single-phase, three wire circuit under the same conditions.		-	±1.0% FS, ±1 digit
	Current			-	However, the accuracy is ±2.0% FS, ±1 digit for the phase-S current for a three-phase, three wire circuit and the phase-N current for a single-phase, three wire circuit under the same conditions.
	Power (active power and reactive power)	Active power and reactive power ±2.0% FS, ±1 digit (Power factor = 1)		-	Active power and reactive power ±2.0% FS, ±1 digit (Power factor = 1)
	Frequency	±0.3 Hz ±1 digit		-
	Power factor2	±5.0% FS at an ambient temperature of 23° C, rated input, rated frequency, and a power factor of 0.5 to 1 to 0.5		-	±5.0% FS at an ambient temperature of 23° C, rated input, rated frequency, and a power factor of 0.5 to 1 to 0.5
	Temperature	-		±5°C two hours after the power supply is turned ON (after performing any adjustments for the ambient temperature)	-
RS-485	Protocols	Communications protocol setting: Compoway/F or Modbus
	Sync method	Start-stop
	Node number setting	CompoWay/F: 0 to 99, Modbus:1 to 99 When a switch operation is performed to set the protocol to Modbus when the node number is set to 0, the node number is automatically changed to 1.
	Baud rate	9,600 bps, 19,200 bps, or 38,400 bps
	Transmission code	CompoWay/F: ASCII, Modbus: Binary
	Data length3	CompoWay/F: 7 bits, 8 bits; Modbus: 8 bits
	Stop bits3	CompoWay/F: 1 bits or 2 bits; Modbus: 1 bit with priority, 2 bits without priority
	Parity	Even, odd, or none
	Maximum transmission distance	500 m
	Maximum number of nodes	CompoWay/F: 31, Modbus: 99
	Communication items	Refer to the relevant communication specification manuals
USB		USB 1.1 compatible

Special CTs
Current Transformer (CT) Cable

Configuration	Installed separately						In-panel (penetration type)
Model	KM20-CTF-5A	KM20-CTF-50A	KM20-CTF-100A	KM20-CTF-200A	KM20-CTF-400A	KM20-CTF-600A	KM20-CTB-5A/50A
Rated primary current	5 A	50 A	100 A	200 A	400 A	600 A	5 A/50 A
Rated secondary current	1.67 mA	1.67 mA	33.3 mA	66.7 mA	66.7 mA	66.7 mA	1.67 mA/16.7 mA
Secondary winding	3,000 turns				6,000 turns	9,000 turns	3,000 turns
Applicable frequency	10 Hz to 5 kHz
Insulation resistance	Between output terminals and case: 50 MΩ min. (at 500 VDC)
Dielectric strength	Between output terminals and case: 2,000 VAC for 1 minute
Protective element	7.5-V clamp element
Allowable number of connections/disconnections	100 times
Inner diameter (mm)	10		16	24	37		10
Operating temperature and humidity ranges	−20 to 60° C, 85% max. (with no condensation)
Storage temperature and humidity ranges	−30 to 65° C, 85% max. (with no condensation)

KM-series Power monitor models

Series name		KM1 Series
Model		KM1-PMU_A-FLK	KE1-CTD8E	KM1-EMU8A-FLK
Dimensions (mm)		45 × 96 × 90 (W×H×D) (maximum width of 45 × 5 when five Units are linked together)
Applicable phase wiring method	Single-phase, two wire	OK	OK	-
	Single-phase, three wire	OK	OK	-
	Three-phase, three wire	OK	OK	-
	Three-phase, four wire	PMU1A only	OK	-
	400-V direct measurement	OK	-	-
Power Monitor power supply		100 to 240 VAC	Provided from the Master Unit	100 to 240 VAC
Measured items	Total power consumption	OK	OK	-
	Active power	OK	OK	-
	Instantaneous reactive power	OK	OK	-
	Current	OK	OK	-
	Voltage	OK	-	-
	Power factor	OK	OK	-
	Frequency	OK	-	-
	Pulse count	-	-	OK (Can be changed with event input.)
	Temperature	-	-	OK

KE1-DRT-FLK DeviceNet communications unit

Item	Specification
Communications	Remote I/O communications (I/O assignment settings with simple assignment settings or the Configurator) Message communications
Connection configuration	Can be a combination of multidrops and T-branching (for both main and branch lines).
Baud rate	500, 250, or 125 kbps (automatically detected)
Rated primary current	5 dedicated lines (2 signal lines, 2 power lines, and 1 shield)
Communications distance	Baud rate	Maximum network length4	Branch line length	Total for all branch lines
	500 kbps	100 m max. (100 m max.)	6 m max.	39 m max.
	250 kbps	250 m max. (100 m max.)	6 m max.	78 m max.
	125 kbps	500 m max. (100 m max.)	6 m max.	156 m max.

1. Based on JISC1111, without special CT error, at ambient temperature of 23° C, rated input, and rated frequency. Applicable to 2nd, 3rd, 5th, 7th, 9th, 11th, and 13th harmonics.

2. Power factor formula: Power factor = Active power/Apparent power

3. The set value may change when the protocol is changed to Modbus. Check the set values if you change the DIP switch settings.

4. Numbers in parentheses are the lengths for thin cable.

1. Based on JISC1111, without special CT error, at ambient temperature of 23° C, rated input, and rated frequency. Applicable to 2nd, 3rd, 5th, 7th, 9th, 11th, and 13th harmonics.

2. Power factor formula: Power factor = Active power/Apparent power

3. The set value may change when the protocol is changed to Modbus. Check the set values if you change the DIP switch settings.

4. Numbers in parentheses are the lengths for thin cable.

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