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Accura 2700M Integrated Incoming-Unit Module
Accura 2700M is installed in the MCC incoming unit and performs the primary functions of the Smart Motor Management System. It measures the total power consumption of the MCC by sensing the voltage and current of the incoming line. It also monitors the power of each motor unit by transmitting sampled voltage data to all connected Accura 2750P[C] modules via internal communication cables. Through the internal communication network, Accura 2700M delivers and receives measurement data, motor control commands, and operating status information to and from multiple Accura 2750P[C] modules in the MCC. It also exchanges the same data with multiple Accura 2750LC[I] modules in the LOP(Local Operating Panel) through Accura 2750LCG. Accura 2700M sends this data to Accura 2700D, enabling users to monitor the operating status of all motors from the MCC front panel. It connects to the host system via Ethernet and RS-485 communication.

Connection to Accura 2750P[C]
Transmits incoming line voltage data to multiple Accura 2750P[C] modules
Collects measurement and operating data for each motor unit from multiple Accura 2750P[C] modules
Proprietary protocol	2 ports with identical functions (UNIT1, UNIT2)
2 ports for ring topology	Supports communication redundancy
Connector type	RJ45 connector
Communication cable	Ethernet cable Cat.5e FTP, STP, SFTP
Number of connectable Accura 2750P[C] modules	Maximum 30 (ring topology)
Communication cable length	Between Accura 2700M and Bridge-Socket	Maximum 1 m (for Accura 2700M device redundancy)
	Between Accura 2700M and Unit-Socket	Standard: within 3 m, Maximum 10 m¹
	Between Unit-Sockets	Maximum 3 m
	Between Unit-Socket and Accura 2750P[C]	Maximum 1.5 m
	Total ring network length	Maximum 90 m
Power Measurement of MCC Incoming Line
Measures and analyzes the power characteristics of the entire MCC by sensing the incoming-line voltage and current
Measurement Parameter
Voltage	Line-to-neutral voltage (per phase/average, maximum), Line-to-line voltage (each line-to-line/average, maximum)
	Fundamental voltage (per phase/average)
	Harmonics (per phase, up to the 50th order), THD (per phase, maximum)
	Vector diagram (phasor diagram)
	Symmetrical components (positive-, negative-, zero-sequence components, maximum), Unbalance (IEC, NEMA, maximum)
	Dip(Sag), Swell
Frequency	Instantaneous, maximum, minimum
Current	RMS (per phase/average, maximum), Fundamental (per phase/average)
	Harmonics (per phase, up to the 50th order), THD (per phase, maximum), TDD (per phase, maximum)
	Vector diagram (phasor diagram)
	Symmetrical components(positive-, negative-, zero-sequence, maximum), Unbalance(IEC, NEMA, maximum)
	Demand current (per phase, average), Peak demand current (per phase, average)
	Crest Factor (per phase, maximum), K-factor (per phase, maximum)
Power	Active, Reactive, Apparent(per phase/ total, maximum)
	Demand active power (per phase/total), Peak demand active power (per phase/total)
Power factor	Per phase, total
Active energy	Three-phase total (Received, Delivered, Sum, Net)
Reactive energy	Three-phase total (Positive, Negative, Sum, Net)
Apparent energy	Three-phase total
External Communication with Host System
Ethernet communication	100 Base-TX(100 Mbps/Full Duplex), Modbus TCP protocol Accura 2700M device redundancy	2 ports with identical functions (ETHERNET1, ETHERNET2)
	2 ports: Ethernet switching, RSTP	Communication redundancy using a ring topology
	Connector type	RJ45 connector
	Communication cable	Ethernet cable Cat.5e FTP, STP, SFTP
	Communication cable wiring method	Star, Daisy-chain, Ring
RS-485 communication	1,200 - 115,200 bps², Modbus RTU protocol	1 port (Ta, Tb)
	Connector type	Screw-type terminal (pluggable)
	Communication cable	UL 2919 RS-485 1P/2P 24 AWG
Connection to Accura 2700D
Communication with the HMI module	100 Base-TX(100 Mbps/Full Duplex) Proprietary protocol	1 port (DISPLAY A2700D)
	Connector type	RJ45 connector
	Communication cable³	Ethernet cable Cat.5e FTP(F/UTP)
	Communication cable length	3 m
	Power supply through the communication cable
Connection to Accura 2750LCG
Communication with the LOP control module	Proprietary protocol	2 ports with identical function (A2750LCG-1, A2750LCG-2)
	2 ports	Supports Accura 2750LCG device redundancy
	Connector type	RJ45 connector
	Communication cable	Ethernet cable Cat.5e FTP, STP, SFTP
	Communication cable length	Maximum 300 m
Power Supply
Rated voltage(Us)	110 - 240 V AC 50/60 Hz, 110 - 300 V DC
Operating voltage range	0.8 x Us - 1.1 x Us

1. The recommended cable length is within 3 m. In ring topology configurations, the allowable cable length is up to 10 m if the total cable length in the ring does not exceed 90 m.
2. At 115,200 bps, a master can communicate with up to 16 slave devices at a maximum distance of 600 m.
3. A communication cable for the display module is included with Accura 2700D. For redundant configurations of Accura 2700M, an additional display module communication cable must be ordered.

Accura 2700M Integrated Incoming-Unit Module

Power Supply
Port name	L+, N-, G (Earth Ground)
Connector type	Screw-type terminal (pluggable)
Wire specifications	2.1 - 3.5 mm² (14 - 12 AWG)
Rated voltage (Us)	110 - 240 V AC 50/60 Hz, 110 - 300 V DC
Operating voltage range	0.8 x Us - 1.1 x Us
Rated power consumption	Maximum 15 VA (AC 220 V, 25 °C) during supercapacitor charging and when connected to Accura 2700D
Rated insulation voltage (Ui)	300 V (at pollution degree 2)
Rated impulse voltage (Uimp)	4 kV
Inrush current	Peak 31 A, duration no more than 1 ms (AC 220 V)
	Peak 11 A, duration no more than 200 μs (DC 110 V)
External input fuse rating	2 A, 500 V
Allowable instantaneous power outage time	Minimum 10 seconds (with built-in supercapacitor)
Voltage Input
Port name	V1, V2, V3, VN
Connector type	Terminal block M4
Wire specification	2.1 - 5.0 mm² (14 - 10 AWG)
Measuring range (Accuracy guaranteed)	AC 65 - 300 V direct L-N (line-to-neutral voltage)	Accuracy IEC 61557-12 Class 0.5
	AC 110 - 520 V direct L-L (line-to-line voltage)
Minimum measured value	AC 5 V direct L-N (line-to-neutral voltage)
Sampling	512 samples/cycle
Rated voltage	520 V
Rated insulation voltage (Ui)	520 V (Overvoltage category III, pollution degree 2)
Rated impulse voltage (Uimp)	8 kV
Frequency measurement	42 - 69 Hz
Impedance	6 MΩ (L-N: V1/V2/V3-Vn)
Burden	0.01 VA/phase @220 V
Current Input
Port name	I1, I2, I3, IN
Connector type	Terminal block M4 (internal busbar)
Wire specification	2.1 - 5.0 mm² (14 - 10 AWG)
Rated current	5 A @ CT 5 A
	1 A @ CT 1 A
Maximum input current	10 A @ CT 5 A (twice the rated current)
	2 A @ CT 1 A (twice the rated current)
Measuring range (Accuracy guaranteed)	50 mA - 10 A @ CT 5 A	Accuracy IEC 61557-12 Class 0.2
	50 mA - 2 A @ CT 1 A
Minimum measured value	20 mA @ CT 5 A (minimum settable value: 5 mA)
	5 mA @ CT 1 A (minimum settable value: 5 mA)
Sampling	256 samples/cycle
Overcurrent capacity	1,000 % of the rated current for 1 second	200 % of the rated current (continuous)
Burden	Maximum 0.01 VA/phase @ 10 A
Communication with the Host System
Ethernet communication	100Base-TX (100 Mbps/Full Duplex), Modbus TCP Supports Accura 2700M device redundancy	2 ports with identical functions (ETHERNET1, ETHERNET2)
	2 ports: Ethernet switching¹, RSTP²	Supports communication redundancy via a ring topology
	Connector type	RJ45 connector
	Communication cable	Ethernet cable Cat 5e FTP, STP, SFTP ³
	Communication cable length	Maximum 100 m
	Communication cable wiring method	Star, Daisy-chain, Ring topology
	Maximum number of connectable devices in a daisy chain	20
RS-485 communication	1,200 - 115,200 bps, Modbus RTU protocol	1 port (Ta, Tb)
	Connector type	Screw-type terminal (pluggable)
	Communication cable	UL 2919 RS-485 1P/2P 24 AWG
	Communication cable length	Maximum 1,219 m (4,000 ft)
	Maximum number of connectable devices	32 per bus⁴
Connection to Modules
Connection to Accura 2700D, the HMI module	100Base-TX (100 Mbps/Full Duplex) Proprietary protocol	1 port (DISPLAY A2700D)
	Connector type	RJ45 connector
	Communication cable	Ethernet cable Cat.5e FTP(F/UTP)⁵
	Communication cable length	3 m⁶
	Power supply via the communication cable
Connection to Accura 2750P[C]: the motor protection[control] module through the Unit-Socket	Proprietary protocol	2 ports with identical functions (UNIT1, UNIT2)
	2 ports for ring topology	Supports communication redundancy
	Connector type	RJ45 connector
	Communication cable	Ethernet cable Cat.5e FTP, STP, SFTP³
	Number of connectable Accura 2750P[C] modules	Maximum 30 (ring topology)
	Cable length between Accura 2700M and Bridge-Socket	Maximum 1 m (for Accura 2700M device redundancy)
	Cable length between Accura 2700M and Unit-Socket	Standard: within 3 m, Maximum: 10 m⁷
	Cable length between Unit-Sockets	Maximum 3 m
	Cable length between Unit-Socket and Accura 2750P[C]	Maximum 1.5 m
	Total cable length for the entire ring network	Maximum 90 m
Connection to Accura 2750LC[I], the LOP control module via Accura 2750LCG	Proprietary protocol	2 ports with identical functions (A2750LCG-1, A2750LCG-2)
	Two ports for connecting two Accura 2750LCG modules	Supports Accura 2750LCG device redundancy
	Connector type	RJ45 connector
	Communication cable	Ethernet cable Cat.5e FTP, STP, SFTP³
	Communication cable length	Maximum 300 m per port
Management Function
Management of Accura 2750P[C]	Maximum number of connectable modules in a ring topology: 30
	Management function	Performs the MCC server function in response to the host system's requests
		Automatically assigns unit IDs and detects the insertion or withdrawal of motor units
		Transmits incoming-unit voltage data
		Collects measurement and operational status data from each module
		Provides module setup information via Accura 2700D and communication
		Sends digital output(DO) control commands to the modules
		Transmits Accura 2750PC control logic data via communication
		Supports the auto-restart function of Accura 2750PC after a power outage or recovery
Management of Accura 2750LC[I]	Maximum number of modules connectable via Accura 2750LCG: 30 (15 per ring, 2 rings supported)
	Management function	Transmits current, power and operational status data from the motor unit
		Transmits motor-unit control commands
Event	Monitored item	Voltage dip/swell

1. The built-in Ethernet switch allows Ethernet connections among Accura 2700M modules without the need for an external switch.
2. RSTP(Rapid Spanning Tree Protocol), IEEE 802.1D-2004.
3. FTP(Foiled Shielded Twisted Pairs), STP(Braided Shielded Twisted Pairs), SFTP(Braided Foiled Shielded Twisted Pairs)
4. At 115,200 bps, a master can communicate with up to 16 slave devices at a maximum distance of 600 m.
5. It is provided with the product. FTP(F/UTP): Foiled Shielded Twisted Pairs
6. A communication cable for the display module is included with Accura 2700D. For redundant configurations of Accura 2700M, an additional display module communication cable must be ordered.
7. The recommended cable length is within 3 m. In ring topology configurations, the allowable cable length is up to 10 m if the total cable length in the ring does not exceed 90 m.

General Specifications

Environmental Condition
Operating temperature	-20 - 60 °C (-4 - 140 ℉)
Storage temperature	-40 - 85 °C (-40 - 185 ℉)
Operating humidity	5 - 95 % (non-condensing)
Operating altitude	Up to 2,000 m
Operating environment	Pollution degree 2
General
Warranty period	2 years
Vibration
Accura 2700M, Accura 2700D, Accura 2750P[C], Accura 2750INV/VOL, Accura 2750D[C/CI], Accura 2750LCG, Accura 2750LC, Unit-Socket, Bridge-Socket	10 - 150 Hz, 20 m/s² (Panel mounting)	IEC 60068-2-6
Shock
All modules	15 g / 11 ms	IEC 60068-2-27
Heat Resistance
All product cases	V0	UL 94
	960 °C	IEC 60695-2-11
Membrane Accura 2750D[C/CI] LCD Window	V2	UL 94
	650 °C	IEC 60695-2-11
EMC Immunity	IEC 61326-1, IEC 6100-3-2, IEC 61000-3-3
Electrostatic discharge immunity	8 kV / air	IEC 61000-4-2
	4 kV / contact
Radiated radio-frequency electromagnetic field immunity	10 V/m	IEC 61000-4-3
Electrical Fast Transient/Burst	2 kV/5 kHz(power)	IEC 61000-4-4
	1 kV/5 kHz(signal)
Surge immunity	2 kV(line-earth)	IEC 61000-4-5
	1 kV(line-line)
Immunity to conducted disturbances induced by radio-frequency field	10 V	IEC 61000-4-6
Power frequency magnetic field immunity	30 A/m	IEC 61000-4-8
Voltage dips, short interruptions and voltage variations immunity	0 %, 1 cycle	IEC 61000-4-11
	40 %, 10/12 cycles
	70 %, 25/30 cycles
	80 %, 250/300 cycles¹
EMC Emission	EN 55011
Conducted emission and radiated emission	Class A Group

1. Short interruptions

-	Voltage IEC61557-12 Class 0.5
-	Current IEC61557-12 Class 0.2
-	Power IEC62053-22 Class 0.5S
-	Demand, Peak Demand
-	Harmonics, THD, TDD, Phasor, Unbalance

-	Ethernet 2-port[Switch]
-	Ring connection[RSTP protocol]