Fuji Electric FRENIC-MEGA How to use

STARTING GUIDE
FRENIC MEGA
High Performance Multifunction
Inverter
3 ph 400 V 0.4 to 220 kW
SG_MEGA_EN_1.3.0

Index Version Date Applied by
0.4.0 Version for proofreading 16.11.07 Andreas Schader,
0.5.0 European Version 06.02.08 Andreas Schader
0.6.0 Second proofreading 19.02.08 Andreas Schader
0.7.0 Information added and some corrections made,
reduced version made 26.05.08 David Bedford
1.0 Version approved 26.06.08 David Bedford
1.1 Small corrections in chapter 6
Capacities above 220 kW added 4.06.08 David Bedford
1.2 Functions corresponding to ROM 1000 (third
software version) added 03.11.08 David Bedford
1.3.0 Comments added in note 3 and 4 of page 9
(chapter 3) 02.09.10 Carlos Poyatos

CONTENTS
Chapter Page
1. SAFETY INFORMATIONAND CONFORMITY TO STANDARDS 1
2. MOUNTING THE INVERTER 4
3. WIRING THE INVERTER 6
4. OPERATION USING THE KEYPAD 17
5. QUICK START COMMISSIONING 19
6. FUNCTION CODES 26
7. TROUBLESHOOTING 36
8. SPECIFICATIONSAND EXTERNALDIMENSIONS 37
9. OPTIONS 39

Preface
Thank you for purchasing our FRENIC-Mega series of inverters.
This product is designed to drive three-phase induction motors for many types of application.
Read through this manual and be familiar with correct handling and operation of this product.
Improper handling may result in an incorrect operation, a short life, or even a failure of this
product as well as the motor.
Deliver this manual to the end user of this product. Keep this manual in a safe place until this
product is discarded.
Listed below there are the other materials related to the use of the FRENIC-Mega. Read
them in conjunction with this manual if necessary.
• FRENIC-Mega User's Manual (MEH278a)
• FRENIC-Mega Instruction Manual (INR-SI47-1223a-E)
• RS-485 Communication User's Manual (MEH448c)
• FRENIC-Mega Catalogue (MEH655)
The materials are subjected to change without notice. Be sure to obtain the latest editions for
use.

Chapter 1: Safety Information and conformity to standards
1
Chapter 1 SAFETY INFORMATION AND CONFORMITY TO STANDARDS
1.1 Safety precautions
Read this manual thoroughly before proceeding with installation, connections (wiring), operation, or maintenance and inspection. Ensure you have sound
knowledge of the device and familiarize yourself with all safety information and precautions before proceeding to operate the inverter.
Safety precautions are classified into the following two categories in this manual.
Failure to heed the information indicated by this symbol may lead to dangerous conditions, possibly resulting in death
or serious bodily injuries.
Failure to heed the information indicated by this symbol may lead to dangerous conditions, possibly resulting in minor
or light bodily injuries and/or substantial property damage.
Failure to heed the information contained under the CAUTION title can also result in serious consequences. These safety precautions are of utmost
importance and must be observed at all times.
Application
• The FRENIC-Mega is designed to drive a three-phase induction motor. Do not use it for single-phase motors or for other purposes.
Fire or an accident could occur.
• The FRENIC-Mega may not be used for a life-support system or other purposes directly related to the human safety.
• Though the FRENIC-Mega is manufactured under strict quality control, install safety devices for applications where serious accidents or property
damages are foreseen in relation to the failure of it. An accident could occur.
Installation
• Install the inverter on a base made of metal or other non-flammable material. Otherwise, a fire could occur.
• Do not place flammable object nearby. Doing so could cause fire.
• Inverters with a capacity of 30 kW or above, whose protective structure is IP00, involve a possibility that a human body may touch the live
conductors of the main circuit terminal block. Inverters to which an optional DC reactor is connected also involve the same. Install such inverters in
an inaccessible place. Otherwise, electric shock or injuries could occur.
• Do not support the inverter by its front cover during transportation. Doing so could cause a drop of the inverter and injuries.
• Prevent lint, paper fibers, sawdust, dust, metallic chips, or other foreign materials from getting into the inverter or from accumulating on the heat
sink.
• When changing the positions of the top and bottom mounting bases, use only the specifiedscrews. Otherwise, a fire or an accident might result.
• Do not install or operate an inverter that is damaged or lacking parts. Doing so could cause fire, an accident or injuries.
Wiring
• If no zero-phasecurrent (earth leakage current) detective device such as a ground-fault relayis installed in the upstream power supply line in order
to avoid the entire power supply system's shutdown undesirable to factory operation, install a residual-current-operated protective device
(RCD)/earth leakage circuit breaker (ELCB) individually to inverters to break the individual inverter power supply lines only.
Otherwise, a fire could occur.
• When wiring the inverter to the power source, insert a recommended molded case circuit breaker (MCCB) or residual-current-operated protective
device (RCD)/earth leakage circuit breaker (ELCB) (with overcurrent protection) in the path of each pair of power lines to inverters. Use the
recommended devices within the recommended current capacity.
• Use wires in the specified size.
• Tighten terminals with specified torque. Otherwise, a fire could occur.
• When there is more than one combination of an inverter and motor, do not use a multicore cable for the purpose of handling their wirings together.
• Do not connect a surge killer to the inverter's output (secondary) circuit. Doing so could cause a fire.
• Be sure to connect an optional DC reactor (DCR) when the capacity of the power supply transformer exceeds 500 kVA and is 10 times or more the
inverter rated capacity. Otherwise, a fire could occur.
• Ground the inverter in compliance with the national or local electric code.
• Be sure to ground the inverter's grounding terminals G. Otherwise, an electric shock or a fire could occur.
• Qualified electricians should carry out wiring.
• Be sure to perform wiring after turning the power OFF. Otherwise, an electric shock could occur.

Chapter 1: Safety Information and conformity to standards
2
• Be sure to perform wiring after installing the inverter unit. Otherwise, an electric shock or injuries could occur.
• Ensure that the number of input phases and the rated voltage of the product match the number of phases and the voltage of the AC power supply
to which the product is to be connected. Otherwise, a fire or an accident could occur.
• Do not connect the power supply wires to output terminals (U, V, and W).
• When connecting a braking resistor, never connect it toterminals other than terminals P(+) and DB. Doing so could cause fire or an accident.
• In general, sheaths of the control signal wires are not specifically designed to withstand a high voltage (i.e., reinforced insulation is not applied).
Therefore, if a control signal wire comes into direct contact with a live conductor of the main circuit, the insulation of the sheath might break down,
which would expose the signal wire to a high voltage of the maincircuit. Make surethat thecontrol signal wires will not come into contact with live
conductors of the main circuit. Doing so could cause an accident or an electric shock.
• Before changing the switches or touching the control circuit terminal symbol plate, turn OFF the power and wait at least five minutes for inverters
with a capacity of 22 kW or below, or at least ten minutes for inverters with a capacity of 30 kW or above. Make sure that the LED monitor and
charging lamp are turned OFF. Further, make sure, using a multimeter or a similarinstrument, that the DC link bus voltage between theterminals
P(+) and N(-) has dropped to the safe level (+25 VDC or below). Otherwise, an electric shock could occur.
• The inverter, motor and wiring generate electric noise. Be careful about malfunction of the nearby sensors and devices. To prevent them from
malfunctioning, implement noise control measures. Otherwise an accident could occur.
Operation
• Be sure to mount the front cover before turning the power ON. Do not remove the cover when the inverter power is ON.
Otherwise, an electric shock could occur.
• Do not operate switches with wet hands. Doing so could cause electric shock.
• If the auto-reset function has been selected, the inverter may automatically restart and drive the motor depending on the cause of tripping. Design
the machinery or equipment so that human safety is ensured at the time of restarting. Otherwise, an accident could occur.
• If the stall prevention function (current limiter), automatic deceleration(anti-regenerative control), or overload prevention control has been selected,
the inverter may operate with acceleration/deceleration or frequency different from the commanded ones. Design the machine so that safety is
ensured even in such cases.
• The key on the keypad is effective only when the keypad operation is enabled with function code F02 (= 0, 2 or 3). When the keypad operation
is disabled, prepare an emergency stop switch separately for safe operations.
Switching the run command source from keypad (local) to external equipment (remote) by turning ON the "Enable communications link" command
LE disables the key. To enable the key for an emergency stop, select the STOP key priority with function code H96 (= 1 or 3).
• If any of theprotective functions have been activated, first remove the cause. Then, after checking that the all run commands are set to OFF, release
the alarm. If the alarm is released while any run commands are set to ON, the inverter may supply the power to the motor, running the motor.
Otherwise, an accident could occur.
• If you enable the "Restart mode after momentary power failure" (Function code F14 = 3 to 5), then the inverter automatically restarts running the
motor when the power is recovered. Design the machinery or equipment so that human safety is ensured after restarting.
• If the user configures the function codes wrongly without completely understanding this Instruction Manual and the FRENIC-Mega User's Manual,
the motor may rotate with a torque or at a speed not permitted for the machine.
An accident or injuries could occur.
• Even though the inverter has interrupted power to the motor, if the voltage is applied tothe main circuit input terminals L1/R, L2/S and L3/T, voltage
may be output to inverter output terminals U, V, and W.
An electric shock may occur.
• The inverter can easily accept high-speed operation. When changing the speed setting, carefully check the specifications of motors or equipment
beforehand.
Otherwise, injuries could occur.
• Do not touch the heat sink and braking resistor because they become very hot. Doing so could cause burns.
• The DC brake function of the inverter does not provide any holding mechanism. Injuries could occur.
• When the inverter is controlled withthe digital input signals, switching run or frequency command sources with the related terminal commands (e.g.,
SS1, SS2, SS4, SS8, Hz2/Hz1, Hz/PID, IVS, and LE) may cause a sudden motor start or an abrupt change in speed.
An accident or injuries could occur.

Chapter 1: Safety Information and conformity to standards
3
Maintenance and inspection, and parts replacement
• Before proceeding to the maintenance/inspection jobs, turn OFF the power and wait at least five minutes for inverters with a capacity of 22 kW or
below, or at least ten minutes for inverters with a capacity of 30 kW or above. Make sure that the LED monitor and charging lamp are turned OFF.
Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between the terminals P(+) and N(-) has dropped to the
safe level (+25 VDC or below).
Otherwise, an electric shock could occur.
• Maintenance, inspection, and parts replacement should be made only by qualified persons.
• Take off the watch, rings and other metallic objects before starting work.
• Use insulated tools.
Otherwise, an electric shock or injuries could occur.
• Never modify the inverter.
Doing so could cause an electric shock or injuries.
Disposal
• Treat the inverter as an industrial waste when disposing of it.
Otherwise injuries could occur.
GENERAL PRECAUTIONS
Drawings in this manual may be illustrated without covers or safety shields for explanation of detail parts. Restore the covers and shields in the original
state and observe the description in the manual before starting operation.
Icons
The following icons are used throughout this manual.
This icon indicates information which, if not heeded, can result in the inverter not operating to full efficiency, as well as information
concerning incorrect operations and settings which can result in accidents.
This icon indicates information that can prove handy when performing certain settings or operations.
This icon indicates a reference to more detailed information.
1.2 Conformity to European standards
The CE marking on Fuji Electric products indicates that they comply with the essential requirements of the Electromagnetic Compatibility (EMC) Directive
2004/108/EC issued by the Council of the European Communities and the Low Voltage Directive 2006/95/EC.
Inverters with built-in EMC filter that bear a CE marking are in conformity with EMC directives. Inverters having no built-in EMC filter can be in conformity
with EMC directives if an optional EMC compliant filter is connected to them.
General purpose inverters are subject to the regulations set forth by the Low Voltage Directive in the EU. Fuji Electric declares the inverters bearing a CE
marking are compliant with the Low Voltage Directive.
FRENIC Mega inverters are in accordance with the regulations of following council directives and their amendments:
EMC Directive 2004/108/EC (Electromagnetic Compatibility)
Low Voltage Directive 2006/95/EC (LVD)
For assessment of conformity the following relevant standards have been taken into consideration:
EN61800-3:2004
EN61800-5-1:2003
The FRENIC-MEGA inverters are categorized as category C2 or C3 according to the EN61800-3:2004. When you use these products in the
domestic environment, you may need to take appropriate countermeasures to reduce or eliminate any noise emitted from these products.

Chapter 2: Mounting the inverter
4
Chapter 2 MOUNTING THE INVERTER
2.1 Operating Environment
Install the inverter in an environment that satisfies the requirements listed in Table 2.1.
Table 2.1 Environmental Requirements
Item Specifications
Site location Indoors
Ambient
temperature -10 to +50°C(Note 1)
Relative
humidity 5 to 95% (No condensation)
Atmosphere The inverter must not be exposed to dust, direct
sunlight, corrosive gases, flammable gases, oil mist,
vapor or water drops.
Pollution degree 2 (IEC60664-1) (Note 2)
The atmosphere can contain a small amount of salt.
(0.01 mg/cm2or less per year)
The inverter must not be subjected to sudden
changes in temperature that will cause condensation
to form.
Altitude 1,000 m max. (Note 3)
Atmospheric
pressure 86 to 106 kPa
3 mm (Max. amplitude) 2 to less than 9 Hz
9.8 m/s29 to less than 20 Hz
2 m/s220 to less than 55 Hz
Vibration
1 m/s255 to less than 200 Hz
2.2 Installing the Inverter
(1) Mounting base
Install the inverter on a base made of metal or other non-flammable
material. Do not mount the inverter upside down or horizontally.
Install the inverter on a base made of metal or other non-flammable
material.
Otherwise, a fire could occur.
(2) Clearances
Ensure that the minimum clearances indicated in Figure 2.1 are
maintained at all times. When installing the inverter in the panel o
f
your system, take extra care with ventilation inside the panel as the
ambient temperature easily rises. Do not install the inverter in a small
panel with poor ventilation.
When mounting two or more inverters
When mounting two or more inverters in the same unit or panel,
basically lay them out side by side. When mounting them necessaril
y
one above the other, be sure to separate them with a partition plate o
r
the like so that any heat radiating from an inverter will not affect the
one/s above.
As long as the ambient temperature is 40°C or lower, inverters with a
capacity of 22 kW or below can be mounted side by side without any
clearance between them.
Table 2.2 Output Current Derating Factor
in Relation to Altitude
Altitude Output current
derating factor
1000 m or lower 1.00
1000 to 1500 m 0.97
1500 to 2000 m 0.95
2000 to 2500 m 0.91
2500 to 3000 m 0.88
(Note 1) When inverters are mounted side-
by-side without any clearance between
them (22 kW or below), the ambien
t
temperature should be within the range
from -10 to +40°C.
(Note 2) Do not install the inverter in an
environment where it may be exposed to
lint, cotton waste or moist dust or dirt which
will clog the heat sink of the inverter. If the
inverter is to be used in such an
environment, install it in a dustproof panel
of your system.
(Note 3) If you use the inverter in an
altitude above 1000 m, you should apply an
output current derating factor as listed in
Table 2.2.
*For the inverters with a capacity of 1.5
kW or below and 30 kW or above,
maintain 50 mm clearance to the right
and left sides, 100 mm to the front.
Figure 2.1 Mounting Direction and
Required Clearances

Chapter 2: Mounting the inverter
5
When employing external cooling
In external cooling, the heat sink, which dissipates about 70% of the
total heat (total loss) generated into air, is situated outside the
equipment or the panel. The external cooling, therefore, significantly
reduces heat radiating inside the equipment or panel.
To employ external cooling for inverters with a capacity of 22 kW or
below, use the external cooling attachment option; for those with a
capacity of 30 kW or above, simply change the positions of the
mounting bases.
Figure 2.2 External Cooling
Prevent lint, paper fibers, sawdust, dust, metallic chips, or other foreign materials from getting into the inverter
or from accumulating on the heat sink.
Otherwise, a fire or accident could occur.
To utilize external cooling for inverters with a capacity of 30 kW or above, change the positions of the top and bottom mounting bases from the
edge to the center of the inverter as illustrated in Figure 2.3.
Screws differ in size, length and count for each inverter. Be sure to refer to the table below.
Table 2.3 Screw Count and Tightening Torque
Inverter type Base fixing screw
(Screw type and q'ty) Case fixing screw (Screw type and q'ty) Tightening torque (N•m)
FRN30G1S-2/FRN37G1S-2
FRN30G1S-4to FRN55G1S-4
M6 x 20
5 pcs for upper side,
3 pcs for lower side
M6 x 20
2 pcs for upper side 5.8
FRN45G1S-2/FRN55G1S-2
FRN75G1S-4M6 x 20
3 pcs each for upper and lower sides M6 x 12 3 pcs for upper side 5.8
Note: A box () in the above table replaces J, E orA depending on the shipping destination.
1) Remove all of the base fixing screws from the top and bottom of the inverter. Also remove the case fixing screws from the top. (On the bottom
are no case fixing screws.)
2) Move the top mounting base to the center of the inverter and secure it with the base fixing screws (2 or 3 pcs), using case fixing screw holes.
(After the movement of the top mounting base, 5 or 3 screws are left unused.)
3) Move the bottom mounting base to the center of the inverter and secure it with the base fixing screws.
Figure 2.3 Changing the Positions of the Top and Bottom Mounting Bases
When changing the positions of the top and bottom mounting bases, use only the specified screws.
Otherwise, a fire or accident could occur.

Chapter 3: Wiring the inverter
6
Chapter 3 WIRING THE INVERTER
Follow the procedure below. (In the following description, the inverter has already been installed.)
3.1 Removing and mounting the front cover and the wiring guide
(1) For inverters with a capacity of 22 kW or below
First loosen the front cover fixing screw, slide the cover downward holding its both sides, tilt it toward you, and then pull it upward, as shown below.
While pressing the wiring guide upward, pull it out toward you.
After carrying out wiring, put the wiring guide and the front cover back into place in the reverse order of removal.
Figure 3.1 Removing the Front Cover and the Wiring Guide
(2) For inverters with a capacity of 30 to 75 kW
Loosen the four front cover fixing screws, hold the cover with both hands, slide it upward slightly, and pull it toward you, as shown below.
Open the keypad enclosure.
After carrying out wiring, align the screw holes provided in the front cover with the screws on the inverter case, then put the front cover back into place
in the reverse order of removal.
Tightening torque: 1.8 N•m (M4)
3.5 N•m (M5)
Figure 3.2 Removing the Front Cover
3.2 Terminal arrangement diagram and screw specifications
3.2.1 Arrangement of main circuit terminals
The table and figures given below show the terminal screw sizes, tightening torque and terminal arrangements. Note that the terminal arrangements differ
depending on the inverter types. In each of the figures, two grounding terminals ( G) are not exclusive to the power supply wiring (primary circuit) or motor
wiring (secondary circuit).
Table 3.1 Main Circuit Terminal Properties
Power
supply
voltage
Nominal
applied motor
(kW)
Inverter type HD/LD
mode
Terminal
screw
size
Tightening
torque
(N·m)
Grounding
screw
size
Tightening
torque
(N·m)
Refer to:
0.4 FRN0.4G1S-4
0.75 FRN0.75G1S-4M3.5 1.2 M3.5 1.2 Figure A
1.5 FRN1.5G1S-4
2.2 FRN2.2G1S-4
Three-
phase
400 V
4.0 FRN4.0G1S-4
HD
M4 1.8 M4 1.8 Figure B

Chapter 3: Wiring the inverter
7
Table 3.1 Main Circuit Terminal Properties (continued)
Power
supply
voltage
Nominal
applied motor
(kW)
Inverter type HD/LD
mode
Terminal
screw
size
Tightening
torque
(N·m)
Grounding
screw
size
Tightening
torque
(N·m)
Refer to:
5.5 HD
FRN5.5G1S-4LD
7.5 HD
FRN7.5G1S-4LD
11 HD
FRN11G1S-4LD
M5 3.5 M5 3.5 Figure C
15 HD
FRN15G1S-4LD
18.5 HD
FRN18.5G1S-4LD
22 HD
FRN22G1S-4LD
M6 5.8 M6 5.8 Figure D
30 HD
FRN30G1S-4LD
37 HD
FRN37G1S-4LD
45 HD
FRN45G1S-4LD
55 HD
FRN55G1S-4LD
M8 13.5 Figure E
75 HD
Three-
phase
400 V
90 FRN75G1S-4LD M10 27
M8 13.5
Figure F
Terminal R0, T0: Screw size M3.5, Tightening torque 1.2 N·m (for all types)
Terminal R1, T1: Screw size M3.5, Tightening torque 1.2 N·m (75 kW or above)
3.2.2 Arrangement of control circuit terminals (common to all inverter types)

Chapter 3: Wiring the inverter
8
3.3 Switching connectors
The switching connectors are located on the power printed circuit board (power PCB) as shown below.
Figure 3.3 Location of Switching Connectors and Auxiliary Power Input Terminals
Power switching connectors (CN UX) (for 400 V class series with 75 kW or above)
The 400 V class series with 75 kW or above is equipped with a set of switching connectors (male) which should be configured according to the power
source voltage and frequency. By factory default, a jumper (female connector) is set to U1. If the power supply to the main power inputs (L1/R, L2/S, L3/T)
or the auxiliary fan power input terminals (R1, T1) matches the conditions listed below, change the jumper to U2.
Connector
configuration
Power source
voltage
398 to 440 V/50 Hz, 430 to 480 V/60 Hz
(Factory default)
380 to 398 V/50 Hz
380 to 430 V/60 Hz
The allowable power input voltage fluctuation is within -15% to +10% of the power source voltage.
Fan power supply switching connectors (CN R and CN W) (for 200 V class series with 37 kW or above and 400 V class series with 75 kW or above)
The standard FRENIC-MEGA series accepts DC-linked power input in combination with a PWM converter. The 200 V class series with 37 kW or above and
400 V class series with 75 kW or above, however, contain AC-driven components such as AC fans. To supply AC power to those components, exchange
the CN R and CN W connectors as shown below and connect the AC power line to the auxiliary fan power input terminals (R1, T1).
Connector
configuration
Use conditions When not using terminal R1 or T1
(Factory default)
When using terminals R1 and T1
• Feeding the DC-linked power
• Combined with a PWM converter
By factory default, the fan power supply switching connectors CN R and CN W are set on
the FAN and NC positions, respectively. Do not exchange them unless you drive the inverter with
a DC-linked power supply.
Wrong configuration of these switching connectors cannot drive the cooling fans, causing a heat sink
overheat alarm
0h1 or a charger circuit alarm pbf .
A
uxiliary power input terminals
Power switching connectors
(
CN UX
)
A
uxiliary fan power input
terminals
Keypad enclosure
Fan power supply switching
connectors (CN R and
CN W)
Power PCB
CN UX (red)
CN W (white)
CN R (red)
CN W (white)
CN R (red)
CN UX (red)

Chapter 3: Wiring the inverter
9
3.4 Wiring of main circuit terminals, grounding terminals and control circuit terminals
*1 Install a recommended molded case circuit breaker (MCCB) or residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB) (with overcurrent
protection function) in the primary circuit of the inverter to protect wiring. Ensure that the circuit breaker capacity is equivalent to or lower than the recommended capacity.
*2 Install a magnetic contactor (MC) for each inverter to separate the inverter from the power supply, apart from the MCCB or RCD/ELCB, when necessary.
Connect a surge absorber in parallel when installing a coil such as the MC or solenoid near the inverter.
*3 To retain an alarm output signal ALM issued on inverter's programmable output terminals by the protective function or to keep the keypad alive even if the main power has shut
down, connect these terminals to the power supply lines. Without power supply to these terminals, the inverter can run. These terminals are available in FRN1.5G1 or above.
*4 Normally no need to be connected. Use these terminals when the inverter is equipped with a high power-factor, regenerative PWM converter RHC series (hereinafter called
PWM converter). These terminals are available in FRN37G1-2 or above or FRN75G.
*5 When connecting an optional DC reactor (DCR), remove the jumper bar from the terminals P1 and P(+).
LD-mode inverters with a capacity of 55 kW and inverters with 75 kW or above are equipped with a DC reactor (DCR) as standard. Be sure to connect the DCR.
Use a DCR when the capacity of the power supply transformer exceeds 500 kVA and is 10 times or more the inverter rated capacity, or when there are thyristor-driven loads in
the same power supply line.
*6 Inverters with a capacity of 7.5 kW or below have a built-in braking resistor (DBR) between the terminals P(+) and DB.
When connecting an external braking resistor (DBR), remove the built-in one.
*7 A grounding terminal for a motor. Use this terminal if needed.
*8 For control signal wires, use twisted or shielded-twisted wires. When using shielded-twisted wires, connect the shield of them to the common terminals of the control circuit. To
prevent malfunction due to noise, keep the control circuit wiring away from the main circuit wiring as far as possible (recommended: 10 cm or more). Never install them in the
same wire duct. When crossing the control circuit wiring with the main circuit wiring, set them at right angles.

Chapter 3: Wiring the inverter
10
*9 The connection diagram shows factory default functions assigned to digital input terminals [X1] to [X7], [FWD] and [REV], transistor output terminals [Y1] to [Y4], and relay
contact output terminals [Y5A/C] and [30A/B/C].
*10 Switching connectors in the main circuits. For details, refer to " Switching connectors" later in this section.
*11 Slide switches on the control printed circuit board (control PCB). Use these switches to customize the inverter operations. For details about the slide switch setting, refer to
Section 3.5 “Setting up the slide switches.”
*12 When using the Enable input function, be sure to remove the jumper wire from terminals [EN] and [PLC]. For opening and closing the hardware circuit between terminals [EN]
and [PLC], use safety components such as safety relays and safety switches that comply with EN954-1, Category 3 or higher. Be sure to use shielded wires exclusive to
terminals [EN] and [PLC]. Do not put them together with any other control signal wire in the same shielded core. Ground the shielding layer. When not using the Enable input
function, keep the terminals between [EN] and [PLC] short-circuited with the jumper wire (factory default).
Table 3.2 Main circuit terminals and grounding terminals description and wiring.
Recommended wire size (mm2)
Main terminal
MCCB or
RCD/ELCB *1
Rated current
Main power
input *2
[L1/R, L2/S, L3/T]
Inverter’s
grounding [ G]
Power supply voltage
Nominal applied motor
Inverter type
HD/LD mode
W/
DCR
W/o
DCR
W/
DCR
W/o
DCR
Inverter outputs *2
[U, V, W]
DC reactor
[P1, P(+)] *2
Braking resistor
[P(+) ,DB] *2
Control circuit
Aux. control power
supply [R0, T0]
Aux. fan power
supply [R1, T1]
0.4 FRN0.4G1-4
0.75 FRN0.75G1-45
1.5 FRN1.5G1-4
5
10
2.2 FRN2.2G1-415
1
4.0 FRN4.0G1-4E
HD
10 20 1.5
1 1
5.5 HD 15 30
1
2.5 1.5 1.5
FRN5.5G1-4LD
7.5 HD 20 40 1.5 4 2.5 2.5
FRN7.5G1-4LD
11 HD 30 50 4 6 4 4
FRN11G1-4LD
15 HD 60 10 6 6
FRN15G1-4LD
18.5 HD
40
75
6
10
FRN18.5G1-4LD
22 HD 50 100 10
16 10
16
FRN22G1-4LD
30 HD 75 16 25 16
FRN30G1-4LD
1
37 HD
125
35 25
25
FRN37G1-4LD
45 HD
100
150
25
50 35 35
FRN45G1-4LD
1.5
55 HD 125 200 35 70 50 70
FRN55G1-4LD — 2.5
—
75 HD 175 70 — 70 95
Three-phase 400 V
90 FRN75G1-4LD 200
—
95 — 95 50×2 4
0.65
to
0.82
2.5
2.5
A box () in the above table replaces S or E depending on the enclosure.
A box () in the above table replaces A or E depending on the shipping destination.
*1 The frame size and model of the MCCB or RCD/ELCB (with overcurrent protection) will vary depending on
the power transformer capacity. Refer to the related technical documentation for details.
*2 The recommended wire size for main circuits is for the 70°C 600 V PVC wires used at a surrounding
temperature of 40°C.
Connecting/disconnecting wires to/from a control circuit terminal
Strip the wire end by 8 to 10 mm as shown below.
Strip length of wire end 8 to 10 ㎜
Type of screwdriver (tip shape) Flat (0.6 x 3.5 ㎜)
For strand wires, the strip length specified above should apply after twisting of them.
If the strip length is out of the specified range, the wire may not be firmly clamped or may be short-circuited with other wires.

Chapter 3: Wiring the inverter
11
Twist the end of the stripped wires for easy insertion and insert it firmly into the wire inlet on the control circuit terminal. If the insertion is difficult, hold
down the clamp release button on the terminal with a flat screwdriver.
When disconnecting the wires from the terminal, hold down the clamp release button on the terminal with a flat screwdriver and pull out the wires.
Connecting wire to terminal Disconnecting wire from terminal
Table 3.3 Symbols, Names and Functions of the Control Circuit Terminals
Classifi-
cation
Symbol Name Functions
[13] Potentio-
meter
power
supply
Power supply (+10 VDC) for frequency command potentiometer
(Variable resistor: 1 to 5kΩ)
The potentiometer of 1/2 W rating or more should be connected.
[12]
[V2]
Analog
setting
voltage
inputs
(1) The frequency is commanded according to the external voltage input.
• 0 to ±10 VDC/0 to ±100% (Normal operation)
• +10 to 0 VDC/0 to 100% (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback signal, auxiliary
frequency command setting, ratio setting, torque limiter level setting, or analog input
monitor can be assigned to this terminal.
(3) Hardware specifications
• Input impedance: 22kΩ
• The maximum input is ±15 VDC, however, the voltage higher than ±10 VDC is
handled as ±10 VDC.
• Inputting a bipolar analog voltage (0 to ±10 VDC) to terminal [12] requires setting
function code C35 to "0."
• Inputting a bipolar analog voltage (0 to ±10 VDC) to terminal [V2] requires setting
function code C45 to "0."
[C1] Analog
setting
current
input
(1) The frequency is commanded according to the external current input.
• 4 to 20 mA DC/0 to 100% (Normal operation)
• 20 to 4 mA DC/0 to 100 % (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback signal, auxiliary
frequency command setting, ratio setting, torque limiter level setting, or analog input
monitor can be assigned to this terminal.
(3) Hardware specifications
• Input impedance: 250Ω
• The maximum input is +30 mA DC, however, the current larger than +20 mA DC is
handled as +20 mA DC.
[C1] PTC/NTC
thermis-
tor input
(1) Connects PTC (Positive Temperature
Coefficient)/NTC (Negative
Temperature Coefficient) thermistor for
motor protection. Ensure that the slide
switch SW5 on the control PCB is
turned to the PTC/NTC position (see
Section 3.5 "Setting up the slide
switches").
The figure shown at the right illustrates
the internal circuit diagram where SW5
(switching the input of terminal [C1]
between C1 and PTC/NTC) is turned
to the PTC/NTC position. For details
on SW5, refer to Section 3.5 "Setting
up the slide switches." In this case,
you must change data of the function
code H26.
Figure 3.4 Internal Circuit Diagram
(SW5 Selecting PTC/NTC)
Analog input
[11] Analog
common
Common for analog input/output signals ([13], [12], [C1], [V2], [FM1] and [FM2]).
Isolated from terminals [CM] and [CMY].
Wires Flat screwdrive
r
Wires
Wire inlet
Clamp release button

Chapter 3: Wiring the inverter
12
Item Min. Max.
ON level 0 V 2 V
Operating
voltage
(SINK) OFF level 22 V 27 V
ON level 22 V 27 V
Operating
voltage
(SOURCE) OFF level 0 V 2 V
Operating current at
ON
(Input voltage is at 0 V)
2.5 mA 5 mA
(For [X7]) (9.7 mA) (16 mA)
Allowable leakage
current at OFF −0.5 mA
Table 3.3 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi-
cation
Symbol Name Functions
- Since low level analog signals are handled, these signals are especially susceptible to the external
noise effects. Route the wiring as short as possible (within 20 m) and use shielded wires. In
principle, ground the shielded sheath of wires; if effects of external inductive noises are
considerable, connection to terminal [11] may be effective. As shown in Figure 3.5, be sure to
ground the single end of the shield to enhance the shield effect.
- Use a twin-contact relay for low level signals if the relay is used in the control circuit. Do not
connect the relay's contact to terminal [11].
- When the inverter is connected to an external device outputting the analog signal, the external
device may malfunction due to electric noise generated by the inverter. If this happens, according
to the circumstances, connect a ferrite core (a toroidal core or equivalent) to the device outputting
the analog signal or connect a capacitor having the good cut-off characteristics for high frequency
between control signal wires as shown in Figure 3.6
- Do not apply a voltage of +7.5 VDC or higher to terminal [C1]. Doing so could damage the internal
control circuit.
Analog input
Figure 3.5 Connection of Shielded Wire Figure 3.6 Example of Electric Noise Reduction
[CM] Digital
input
common
Two common terminals for digital input signals
These terminals are electrically isolated from the terminals [11]s and [CMY].
[X1] Digital
input 1
[X2] Digital
input 2
[X3] Digital
input 3
[X4] Digital
input 4
[X5] Digital
input 5
[X6] Digital
input 6
[X7] Digital
input 7
[FWD] Run
forward
command
Digital input
[REV] Run
reverse
command
(1) Various signals such as "Coast to a stop," "Enable external alarm trip," and "Select
multi-frequency" can be assigned to terminals [X1] to [X7], [FWD] and [REV] by
setting function codes E01 to E07, E98, and E99. For details, refer to Chapter 6.
(2) Input mode, i.e. SINK/SOURCE, is changeable by using the slide switch SW1.
(Refer to Section 3.5 "Setting up the slide switches.") The factory default for FRN_ _
_G1-2A/4A is SINK, and for FRN_ _ _G1-4E, SOURCE.
(3) Switches the logic value (1/0) for ON/OFF of the terminals [X1] to [X7], [FWD], or
[REV]. If the logic value for ON of the terminal [X1] is 1 in the normal logic system,
for example, OFF is 1 in the negative logic system and vice versa.
(4) Digital input terminal [X7] can be set up as a pulse train input terminal.
Maximum wiring length 20 m
Maximum input pulse 30 kHz: When connected to a pulse generator with open
collector transistor output. (Needs a pull-up or
pull-down resistor. See note below.)
100 kHz: When connected to a pulse generator with
complementary transistor output
Note: Stray capacitance on the wiring between the pulse generator and the inverter
may disable transmission of the pulse train. As a countermeasure against this
problem, insert a pull-up resistor between the open collector output signal (terminal
[X7]) and the power source terminal (terminal [PLC]) if the switch selects the SINK
mode input; insert a pull-down resistor between the output signal and the digital
common terminal (terminal [CM]) if the switch selects the SOURCE mode input. A
recommended pull-up/down resistor is 1kΩ2 W. Check if the pulse train is correctly
transmitted because stray capacity is significantly affected by the wire types and
wiring conditions.
(Digital input circuit specifications)
Figure 3.7 Digital Input Circuit

Chapter 3: Wiring the inverter
13
Item Min. Max.
ON level 22 V 27 V
Operating
voltage
(SOURCE) OFF level 0 V 2 V
Operating current at
ON
(Input voltage is at 24 V)
5 mA 10 mA
Allowable leakage
current at OFF −0.5 mA
Table 3.3 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi-
cation
Symbol Name Functions
[EN] Enable
input
(1) Safety stop function that is compliant with EN954-1, Category 3. This terminal allows
the hardware circuit to stop the inverter's output transistor and coast the motor to a
stop.
(2) This terminal is exclusively used for the source mode input. When it is short-circuited
with terminal [PLC], the Enable input is ON (ready for inverter run); when it is opened,
the inverter coasts the motor to stop. This terminal is not interlocked with the slide
switch SW1.
(3) By factory default, terminals [EN] and [PLC] are short-circuited with each other using
a jumper wire, disabling this function. To enable it, be sure to remove the jumper wire.
For details of connection to this terminal and precautions, refer to the Instruction Manual.
<Terminal [EN] circuit specification>
[PLC]
Photocoupler
[CM]
<Control circuit>
5.4kΩ
+24 VDC
[EN]
5.4kΩ
[PLC] PLC
signal
power
(1) Connects to PLC output signal power supply.
Rated voltage: +24 VDC (Allowable range: +22 to +27 VDC), Maximum 100 mA DC
(2) This terminal also supplies power to the load connected to the transistor output
terminals. Refer to "Transistor output" described later in this table for more
information
Using a relay contact to turn [X1] to [X7], [FWD], or [REV] ON or OFF
Figure 3.8 shows two examples of a circuits that use a relay contact to turn control signal input [X1] to
[X7], [FWD], or [REV] ON or OFF. In circuit (a), the slide switch SW1 has been turned to SINK,
whereas in circuit (b) it has been turned to SOURCE. To configure this kind of circuit, use a highly
reliable relay.
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+24 VDC
SOURCE
SINK
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+24 VDC
SOURCE
SINK
(a) With the switch turned to SINK (b) With the switch turned to SOURCE
Figure 3.8 Circuit Configuration Using a Relay Contact
Digital input
Using a programmable logic controller (PLC) to turn [X1] to [X7], [FWD], or [REV] ON or OFF
Figure 3.9 shows two examples of a circuit that use a programmable logic controller (PLC) to turn
control signal input [X1] to [X7], [FWD], or [REV] ON or OFF. In circuit (a), the slide switch SW1 has
been turned to SINK, whereas in circuit (b) it has been turned to SOURCE. In circuit (a) below,
short-circuiting or opening the transistor's open collector circuit in the PLC using an external power
supply turns ON or OFF control signal [X1] to [X7], [FWD], or [REV]. When using circuit (a), observe
the following:
- Connect the + node of the external power supply (which should be isolated from the PLC's power) to
terminal [PLC] of the inverter.
- Do not connect terminal [CM] of the inverter to the common terminal of the PLC.

Chapter 3: Wiring the inverter
14
Table 3.3 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi-
cation
Symbol Name Functions
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+24 VDC
Programmable
logic controll er
SOURCE
SINK
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+24 VDC
Programmable
logic controller
SOURCE
SINK
(a) With the switch turned to SINK (b) With the switch turned to SOURCE
Digital input
Figure 3.9 Circuit Configuration Using a PLC
For details about the slide switch setting, refer to Section 3.5 “Setting up the slide switches.”
Analog output
[FM1]
[FM2]
Analog
monitor
Both terminals output monitor signals for analog DC voltage (0 to +10 V) or analog DC
current (+4 to +20 mA). The output form (VO/IO) for each of [FM1] and [FM2] can be
switched with the slide switches on the control PCB and the function codes.
Output form
Terminal Terminal function is
specified by Analog DC
voltage
Analog DC
current
Content is
specified by
Slide switch SW4 VO1 IO1
[FM1] Function code F29 0 1
Function code
F31
Slide switch SW6 VO2 IO2
[FM2] Function code F32 0 1
Function code
F35
* Input impedance of the external device: Min. 5kΩ(at 0 to 10 VDC output)
(While the terminal is outputting 0 to 10 VDC, it is capable of driving up to two analog
voltmeters with 10 kΩimpedance.)
* Input impedance of the external device: Max. 500Ω(at 4 to 20 mA DC output)
* Adjustable range of the gain: 0 to 300%
[Y1] Transistor
output 1
[Y2] Transistor
output 2
(1) Various signals such as inverter running, speed/freq. arrival and overload early
warning can be assigned to any terminals, [Y1] to [Y4] by setting function code E20
to E24. Refer to Chapter 6.
(2) Switch the logic value (1/0) for ON/OFF of the terminals between [Y1] to [Y4], and
[CMY]. If the logic value for ON between [Y1] to [Y4] and [CMY] is 1 in the normal
logic system, for example, OFF is 1 in the negative logic system and vice versa.
(Transistor output circuit specification)
Photocoupler
<Control circuit>
[Y1]
to
[Y4]
[CMY]
31 to 35 V
Voltage
Current
Figure 3.10 Transistor Output Circuit
Item Max.
ON level 2 V
Operation
voltage OFF level 27 V
Maximum current
at ON
50 mA
Leakage current
at OFF
0.1 mA
[Y3] Transistor
output 3
Figure 3.11 shows examples of connection between the control circuit and a PLC.
[Y4] Transistor
output 4
- When a transistor output drives a control relay, connect a surge-absorbing
diode across relay’s coil terminals.
- When any equipment or device connected to the transistor output needs to
be supplied with DC power, feed the power (+24 VDC: allowable range:
+22 to +27 VDC, 100 mA max.) through the [PLC] terminal. Short-circuit
between the terminals [CMY] and [CM] in this case.
[CMY] Transistor
output
common
Common terminal for transistor output signals
This terminal is electrically isolated from terminals [CM] and [11]s.
Transistor output
Connecting programmable logic controller (PLC) to terminal [Y1], [Y2], [Y3] or [Y4]
Figure 3.11 shows two examples of circuit connection between the transistor output of the inverter’s
control circuit and a PLC. In example (a), the input circuit of the PLC serves as a SINK for the control
circuit output, whereas in example (b), it serves as a SOURCE for the output.

Chapter 3: Wiring the inverter
15
Table 3.3 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi-
cation
Symbol Name Functions
C0
+24 VDC
Programmable
logic controller
SINK input
Photocoupler
<Control circuit>
[Y1]
to
[Y4]
[CMY]
31 to
35 V
Current
C0
Programmable
logic controller
SOURCE input
+24 VDC
Photocoupler
<Control circuit>
[Y1]
to
[Y4]
[CMY]
31 to
35 V
Current
(a) PLC serving as SINK (b) PLC serving as SOURCE
Transistor output
Figure 3.11 Connecting PLC to Control Circuit
[Y5A/C] General
purpose
relay
output
(1) A general-purpose relay contact output usable as well as the function of the
transistor output terminal [Y1], [Y2], [Y3] or [Y4].
Contact rating: 250 VAC 0.3 A, cos φ= 0.3, 48 VDC, 0.5 A
(2) Switching of the normal/negative logic output is applicable to the following two
contact output modes: "Active ON" (Terminals [Y5A] and [Y5C] are closed (excited)
if the signal is active.) and "Active OFF" (Terminals [Y5A] and [Y5C] are opened
(non-excited) if the signal is active while they are normally closed.).
Relay output
[30A/B/C] Alarm
relay
output
(for any
error)
(1) Outputs a contact signal (SPDT) when a protective function has been activated to
stop the motor.
Contact rating: 250 VAC, 0.3A, cos φ= 0.3, 48 VDC, 0.5A
(2) Any one of output signals assigned to terminals [Y1] to [Y4] can also be assigned to
this relay contact to use it for signal output.
(3) Switching of the normal/negative logic output is applicable to the following two
contact output modes: "Active ON" (Terminals [30A] and [30C] are closed (excited)
if the signal is active.) and "Active OFF" (Terminals [30A] and [30C] are opened
(non-excited) if the signal is active while they are normally closed.).
[DX+]/
[DX-]/
[SD]
RS-485
communi-
cations
port 2
(Terminals
on control
PCB)
A communications port transmits data through the RS-485 multipoint protocol between
the inverter and a personal computer or other equipment such as a PLC.
(For setting of the termination resistor, refer to Section 3.5 “Setting up the slide
switches.”)
RJ-45
connec-
tor for the
keypad
RS-485
communi-
cations
port 1
(Standard
RJ-45
connector)
(1) Used to connect the inverter with the keypad. The inverter supplies the power to the
keypad through the pins specified below. The extension cable for remote operation
also uses wires connected to these pins for supplying the keypad power.
(2) Remove the keypad from the standard RJ-45 connector and connect the RS-485
communications cable to control the inverter through the PC or PLC (Programmable
Logic Controller). For setting of the termination resistor, refer to Section 3.5 “Setting
up the slide switches.”
Figure 3.12 RJ-45 Connector and its Pin Assignment*
* Pins 1, 2, 7, and 8 are exclusively assigned to power lines for the remote
keypad and multi-function keypad, so do not use those pins for any other
equipment.
Communications
USB
connec-
tor
USB port
(On the
keypad)
A USB port connector (Mini-B) that connects an inverter to a personal computer.
FRENIC Loader software running on the computer supports editing the function codes,
transferring them to the inverter, verifying them, test-running an inverter and monitoring
the inverter running status.
- Route the wiring of the control circuit terminals as far from the wiring of the main circuit as possible.
Otherwise electric noise may cause malfunctions.
- Fix the control circuit wires with a cable tie inside the inverter to keep them away from the live parts
of the main circuit (such as the terminal block of the main circuit).

Chapter 3: Wiring the inverter
16
3.5 Setting up the slide switches
Switching the slide switches located on the control PCB allows you to customize the operation mode of the analog output terminals, digital I/O terminals,
and communications ports. The locations of those switches are shown in Figure 3.13.
To access the slide switches, remove the front cover so that you can see the control PCB. For inverters with a capacity of 30 kW or above, open also the
keypad enclosure.
For details on how to remove the front cover and how to open and close the keypad enclosure, refer to Section 3.1 " Removing and mounting the front
cover and the wiring guide."
Table 3.4 lists function of each slide switch.
Table 3.4 Function of Each Slide Switch
Switch Function
SW1
Switches the service mode of the digital input terminals between SINK and SOURCE.
▪This switches the input mode of digital input terminals [X1] to [X7], [FWD] and [REV] to be used as SINK or SOURCE
mode.
▪The factory default for FRN_ _ _G1-2A/4A is SINK, for FRN_ _ _G1-4E, SOURCE.
SW2
Switches the termination resistor of RS-485 communications port on the inverter ON and OFF.
(RS-485 communications port 2, on the control PCB)
▪If the inverter is connected to the RS-485 communications network as a termination device, turn SW2 to ON.
SW3
Switches the termination resistor of RS-485 communications port on the inverter ON and OFF.
(RS-485 communications port 1, for connecting the keypad)
▪To connect a keypad to the inverter, turn SW3 to OFF. (Factory default)
▪If the inverter is connected to the RS-485 communications network as a termination device, turn SW3 to ON.
SW4/SW6
Switches the output form of analog output terminals [FM1] and [FM2] between voltage and current.
When changing the setting of SW4 and SW6, also change the data of function codes F29 and F32, respectively.
[FM1] [FM2]
Output form SW4 Data of F29 SW6 Data of F32
Voltage output (Factory default) VO1 0 VO2 0
Current output IO1 1 IO2 1
SW5
Switches the property of the analog input terminal [C1] between analog setting current input, PTC thermistor input, and
NTC thermistor input.
When changing this switch setting, also change the data of function code H26.
Function SW5 Data of H26
Analog setting current input
(Factory default) C1 0
PTC thermistor input PTC/NTC 1 (alarm) or 2 (warning)
NTC thermistor input PTC/NTC 3
Figure 3.13 shows the location of slide switches on the control PCB for the input/output terminal configuration.
Switch configuration and factory default
SW1* SW2 SW3 SW4/SW6 SW5
Factory
default
SINK
OFF
OFF
VO1/VO2
C1
---
SOURCE
ON
ON
IO1/IO2 PTC/NTC
*The factory default for FRN_ _ _G1-2A/4A is SINK,
for FRN_ _ _G1-4E, SOURCE.
Figure 3.13 Location of the Slide Switches on the Control PCB
To move a switch slider, use a tool with a narrow tip. If the slider is in an ambiguous position, the circuit is unclear whether it
is turned ON or OFF and the digital input remains in an undefined state. Be sure to place the slider so that it contacts eithe
r
side of the switch.