Mitsubishi FR-S520-0.1K to 3.7K(-R)(-C) User manual

S500
TRANSISTORIZED INVERTER
Thank you for choosing this Mitsubishi Transistorized inverter.
If this is the first time for you to use the FR-S500 series, please read through
this instruction manual (basic) carefully and use the inverter safely.
If you are going to use the inverter for higher-level applications, the FR-S500
instruction manual (detailed) [IB(NA)-0600027] is separately available from
where you purchased the inverter or your Mitsubishi sales representative.
INSTRUCTION MANUAL (BASIC)
FR-
FR-S520-0.1K to 3.7K(-R)(-C)
FR-S520-0.1K to 3.7K-NA(R)
FR-S520S-0.1K to 1.5K(-R)
FR-S520S-0.2K to 1.5K-EC(R)
CONTENTS
1. CONNECTION OF PERIPHERAL DEVICES......................................2
2. INSTALLATION METHOD ..................................................................4
3. SPECIFICATIONS OF WIRING AND TERMINALS ............................5
4. OPERATION/CONTROL...................................................................15
5. ADJUSTMENT OF THE FREQUENCY SETTING
POTENTIOMETER AND INDICATOR ..............................................21
6. FUNCTION LIST ...............................................................................25
7. ERRORS AND PROTECTIVE FUNCTIONS.....................................37
8. SPECIFICATIONS.............................................................................40
9. OUTLINE DRAWINGS......................................................................44
Appendix 1 Instructions for Compliance with the European
Standards...........................................................................46
Appendix 2 Instructions for compliance with U.S. and Canadian
Electrical Codes..................................................................48

A - 1
This instruction manual (basic) provides handling information and precautions for
use of the equipment.
Please forward this instruction manual (basic) to the end user.
This instruction manual uses the International System of Units (SI). The
measuring units in the yard and pound system are indicated in parentheses as
reference values.
This section is specifically about safety matters
Do not attempt to install, operate, maintain or inspect the inverter until you have
read through this instruction manual (basic) and appended documents carefully
and can use the equipment correctly. Do not use the inverter until you have a
full knowledge of the equipment, safety information and instructions.
In this instruction manual (basic), the safety instruction levels are classified into
"WARNING" and "CAUTION".
WARNING Assumes that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.
CAUTION Assumes that incorrect handling may cause hazardous
conditions, resulting in medium or slight injury, or may
cause physical damage only.
Note that even the CAUTION level may lead to a serious consequence
according to conditions. Please follow the instructions of both levels because
they are important to personnel safety.
1. Electric Shock Prevention WARNING
!While power is on or when the inverter is running, do not open the front
cover. You may get an electric shock.
!Do not run the inverter with the front cover removed. Otherwise, you may
access the exposed high-voltage terminals or the charging part of the
circuitry and get an electric shock.
!If power is off, do not remove the front cover except for wiring or periodic
inspection. You may access the charged inverter circuits and get an electric
shock.
!Before starting wiring or inspection, check for residual voltages with a meter
etc. more than 10 minutes after power-off.
!Earth the inverter.
!Any person who is involved in the wiring or inspection of this equipment
should be fully competent to do the work.
!Always install the inverter before wiring. Otherwise, you may get an electric
shock or be injured.
!Perform setting dial and key operations with dry hands to prevent an electric
shock.
!Do not subject the cables to scratches, excessive stress, heavy loads or
pinching. Otherwise, you may get an electric shock.
!Do not change the cooling fan while power is on.
It is dangerous to change the cooling fan while power is on.
!When you have removed the front cover, do not touch the connector above
the 3-digit monitor LED display. Doing so can cause an electric shock.

A - 2
2. Fire Prevention CAUTION
!Mount the inverter to incombustible material. Mounting it to or near
combustible material can cause a fire.
!If the inverter has become faulty, switch off the inverter power. A continuous
flow of large current could cause a fire.
!Do not connect a resistor directly to the DC terminals P(+), N(−). This could
cause a fire.
3. Injury Prevention CAUTION
!Apply only the voltage specified in the instruction manual to each terminal to
prevent damage etc.
!Ensure that the cables are connected to the correct terminals. Otherwise,
damage etc. may occur.
!Always make sure that polarity is correct to prevent damage etc.
!While power is on and for some time after power-off, do not touch the inverter
or brake resistor as they are hot and you may get burnt.
4. Additional instructions
Also note the following points to prevent an accidental failure, injury, electric
shock, etc.
(1) Transportation and installation CAUTION
!When carrying products, use correct lifting gear to prevent injury.
!Do not stack the inverter boxes higher than the number recommended.
!Ensure that installation position and material can withstand the weight of the
inverter. Install according to the information in the Instruction Manual.
!Do not operate if the inverter is damaged or has parts missing.
!When carrying the inverter, do not hold it by the front cover or setting dial; it
may fall off or fail.
!Do not stand or rest heavy objects on the inverter.
!Check the inverter mounting orientation is correct.
!Prevent screws, wire fragments, other conductive bodies, oil or other
flammable substances from entering the inverter.
!Do not drop the inverter, or subject it to impact.

A - 3
CAUTION
!Use the inverter under the following environmental conditions:
Ambient
temperature -10°C to + 50°C (14°F to 122°F) (non-freezing)
Ambient humidity 90%RH or less (non-condensing)
Storage
temperature -20°C to +65°C (-4°F to 149°F) *
Ambience Indoors (free from corrosive gas, flammable gas,
oil mist, dust and dirt)
Environment
Altitude,
vibration
Maximum 1000m (3280.80feet) above sea level
for standard operation. After that derate by 3% for
every extra 500m (1640.40feet) up to 2500m
(8202.00feet) (91%).
5.9m/s2or less (conforming to JIS C0911)
*Temperatures applicable for a short time, e.g. in transit.
(2) Wiring CAUTION
!Do not fit capacitive equipment such as power factor correction capacitor,
radio noise filter or surge suppressor to the output of the inverter.
!The connection orientation of the output cables U, V, W to the motor will
affect the direction of rotation of the motor.
(3) Trial run CAUTION
!Check all parameters, and ensure that the machine will not be damaged by a
sudden start-up.
(4) Operation WARNING
!When you have chosen the retry function, stay away from the equipment as it
will restart suddenly after an alarm stop.
!The [STOP] key is valid only when the appropriate function setting has been
made. Prepare an emergency stop switch separately.
!Make sure that the start signal is off before resetting the inverter alarm. A
failure to do so may restart the motor suddenly.
!The load used should be a three-phase induction motor only. Connection of
any other electrical equipment to the inverter output may damage the
equipment.
!Do not modify the equipment.

A - 4
CAUTION
!The electronic overcurrent protection does not guarantee protection of the
motor from overheating.
!Do not use a magnetic contactor on the inverter input for frequent
starting/stopping of the inverter.
!Use a noise filter to reduce the effect of electromagnetic interference.
Otherwise nearby electronic equipment may be affected.
!Take measures to suppress harmonics. Otherwise power harmonics from the
inverter may heat/damage the power capacitor and generator.
!When parameter clear or all clear is performed, each parameter returns to
the factory setting. Re-set the required parameters before starting operation.
!The inverter can be easily set for high-speed operation. Before changing its
setting, fully examine the performances of the motor and machine.
!In addition to the inverter's holding function, install a holding device to ensure
safety.
!Before running an inverter which had been stored for a long period, always
perform inspection and test operation.
(5) Emergency stop CAUTION
!Provide a safety backup such as an emergency brake which will prevent the
machine and equipment from hazardous conditions if the inverter fails.
(6) Maintenance, inspection and parts replacement
CAUTION
!Do not carry out a megger (insulation resistance) test on the control circuit of
the inverter.
(7) Disposing of the inverter CAUTION
!Treat as industrial waste.
(8) General instructions
Many of the diagrams and drawings in this instruction manual (basic) show the
inverter without a cover, or partially open. Never run the inverter in this status.
Always replace the cover and follow this instruction manual (basic) when
operating the inverter.

1
Japanese Power Supply Harmonic Suppression Guideline
The "harmonic suppression guideline for household appliances and general-
purpose products" issued by the Ministry of International Trade and Industry in
September, 1994 applies to the FR-S500 series. By installing the FR-BEL or FR-
BAL power factor improving reactor, this product complies with the "harmonic
suppression techniques for transistorized inverters (input current 20A or less)"
established by the Japan Electrical Manufacturers' Association.
Product Checking and Parts Identification
Unpack the inverter and check the capacity plate on the front cover and the rating
plate on the inverter side face to ensure that the product agrees with your order
and the inverter is intact.
Part names and plates
Front cover
Operation panel
Wiring cover
Serial number
Rating plate
Inverter type
FR - S520 -K-0.1
Capacity plate
Input rating
Output rating
Serial number
Inverter type
Inverter type
R
Represents
the inverter
capacity "kW ". Standard structure
Symbol Protective Structure
None
C
S520
Symbol Voltage Class
Three-phase 200V class With RS-485 communication
function
Totally enclosed structure
IP40
Only for Japanese version
S520S Single-phase 200V class None
Symbol Version
Japanese
specification
NA North American
specification
EC European
specification
•
Removal and reinstallation of the front cover
Remove the front cover by pulling it toward
you in the direction of arrow.
To reinstall, match the cover to the inverter
front and install itstraight.
•
Removal and reinstallation of the wiring cover
The cover can be removed easily by pulling it
toward you.
To reinstall, fit the cover to the inverter along
the guides.
FR-S520(S)-0.1K to 0.75K FR-S520(S)-1.5K
FR-S520-2.2K, 3.7K
Wiring cove
r

2
< Type with RS-485 communication function >
When using the RS-485 connector to wire the
cable, you can cut off the lug of the wiring cover
to wire it. (Cutting off the lug provides protective
structure IP10.)
Lug
CAUTION
The connector above the operation panel is for
manufacturer use. Do not touch it as doing so
may cause an electric shock.
1.CONNECTION OF PERIPHERAL DEVICES
1.1 Basic Configuration
Inverter
Use within the permissible power supply specifications
of the inverter. (Refer to page 40.)
(MC)
(NFB)
or
(ELB)
Earth (Ground)
Earth (Ground)
A
C reactor
(FR-BAL)
DC reactor
(FR-BEL)
No-fuse breaker or earth leakage circuit breaker
Power supply
The breaker must be selected carefully since
an in-rush current flows in the inverter at power-on.
Magnetic contactor
Do not use this magnetic contactor to start and stop the
inverter. Doing so will cause the inverter life to be shorter.
Installation of reactors
The reactors must be used when the power factor is to be
improved or the inverter is installed near a large power supply
system (500kVA or more and wiring distance within 10m (32.81feet)).
Make selection carefully.
Earth (Ground)
To prevent an electric shock, always ground the motor
and inverter.
For reduction of induction noise from the power line of the inverter,
it is recommended to wire the ground cable by returning it to the
ground terminal of the inverter. (For details of noise reduction
techniques, refer to the instruction manual (detailed).)
Devices connected to the output
Do not connect a power capacitor, surge suppressor
or radio noise filter to the output side.
The inverter life is influenced by ambient
temperature. The ambient temperature should
be as low as possible within the permissible
range. (Refer to page 42.)
Wrong wiring might lead to inverter damage. The
control signal lines must be kept fully away from
the main circuit to protect them from noise.
(Refer to page 5.)

3
Selection of peripheral devices (Selection changes with the
power supply input specifications of the inverter.)
FR-S520-0.1K to 3.7K(-R)(-C)
FR-S520-0.1K to 3.7K-NA(R) Cables (mm2)
(*2)
Motor
Output
(kW
(HP))
Inverter
Type
No-Fuse
Breaker
(NFB*1) or
Earth
Leakage
Circuit
Breaker
(ELB)
Power
Factor
Improving
AC
Reactor
Power
Factor
Improving
DC
Reactor
Magnetic
Contactor
(MC) R, S, T U, V, W
0.1
(1/8) FR-S520- 0.1K 30AF/5AT FR-BAL- 0.4K (*3) FR-BEL- 0.4K (*3) S-N10 2 2
0.2
(1/4) FR-S520- 0.2K 30AF/5AT FR-BAL- 0.4K (*3) FR-BEL- 0.4K (*3) S-N10 2 2
0.4
(1/2) FR-S520- 0.4K 30AF/5AT FR-BAL- 0.4K FR-BEL- 0.4K S-N10 2 2
0.75
(1) FR-S520- 0.75K 30AF/10AT FR-BAL- 0.75K FR-BEL- 0.75K S-N10 2 2
1.5
(2) FR-S520- 1.5K 30AF/15AT FR-BAL- 1.5K FR-BEL- 1.5K S-N10 2 2
2.2
(3) FR-S520- 2.2K 30AF/20AT FR-BAL- 2.2K FR-BEL- 2.2K S-N11, S-N12 22
3.7
(5) FR-S520- 3.7K 30AF/30AT FR-BAL- 3.7K FR-BEL- 3.7K S-N20 3.5 3.5
FR-S520S-0.1K to 1.5K(-R)
FR-S520S-0.2K to 1.5K-EC(R) Cables (mm2)
(*2)
Motor
Output
(kW
(HP))
Inverter
Type
No-Fuse
Breaker
(NFB*1) or
Earth
Leakage
Circuit
Breaker
(ELB)
Power
Factor
Improving
AC
Reactor
Power
Factor
Improving
DC
Reactor
Magnetic
Contactor
(MC) R, S
<L1, N> U, V, W
0.1
(1/8) FR-S520S- 0.1K 30AF/5AT FR-BAL- 0.4K (*3) FR-BEL- 0.4K (*3) S-N10 2 2
0.2
(1/4) FR-S520S- 0.2K 30AF/10AT FR-BAL- 0.4K (*3) FR-BEL- 0.4K (*3) S-N10 2 2
0.4
(1/2) FR-S520S- 0.4K 30AF/10AT FR-BAL- 0.75K (*3) FR-BEL- 0.75K (*3) S-N20 2 2
0.75
(1) FR-S520S- 0.75K 30AF/15AT FR-BAL- 1.5K (*3) FR-BEL- 1.5K (*3) S-N20 2 2
1.5
(2) FR-S520S- 1.5K 30AF/20AT FR-BAL- 2.2K (*3) FR-BEL- 2.2K (*3) S-N21 2 2
*1 Choose the NFB type to meet the power supply capacity.
*2 The size of the cable indicated assumes the wiring length of 20m (65.62feet).
*3 The power factor may be slightly lower.

4
2.INSTALLATION METHOD
2.1 Installation of the Inverter
When containing two or more
inverters, install them in parallel
and provide cooling measures.
Leave enough clearances
and provide cooling measures.
Enclosure surface mounting Mounting inside enclosure
Fix the front
cover and wiring
cover after
removing them.
•Install the inverter under the following conditions.
Vertical mounting
Vertical
Ambient temperature
and humidity
Temperature: -10°C to 50°C
(14°F to 122°F)
Humidity: 90%RH maximum
Enough clearances
10cm
(3.94inch)
or more
1cm
(0.39inch)
or more
10cm
(3.94inch)
or more
1cm
(0.39inch)
or more
These clearances are also necessary
for changing the cooling fan.
(1.5K or more)
•The inverter consists of precision mechanical and electronic parts. Never install
or handle it in any of the following conditions as doing so could cause an
operation fault or failure.
Direct sunlight High temperature, high humidity
Oil mist, flammable
gas, corrosive gas,
fluff, dust, etc.
Horizontal placement
Transportation by
holding front cover
or dial
Vertical mounting
(When mounted
inside enclosure)
Mounting to
combustible
material
Vibration
(5.9m/s or more)
2

5
3.SPECIFICATIONS OF WIRING AND TERMINALS
3.1 Terminal connection diagram (Japanese version)
FR-S520-0.1K to 3.7K (-R) (-C)
Power factor improving
DC reactor
(FR-BEL: Option)
3-phase AC
power supply
NFB R
S
T
PC
External transistor common
24VDC power supply
Contact input common (source)
STF
STR
RH
RM
RL
SD
Forward rotation start
Reverse rotation start
Middle
High
Low
Frequency setting signals (Analog)
10 (+5V)
2
2
3
1
4 to 20mADC (+) 4 (4 to 20mADC)
Frequency
setting
potentiometer
1/2W1k
(*4)
RUN
SE Running
FM
SD
Control input signals
(No voltage input allowed)
Jumper: Remove this
jumper when FR-BEL
is connected.
Motor
IM Ground
Alarm
output
A
B
C
U
V
W
P1
P
N
(+) (-)
Earth (Ground)
Grounding resistance 100 maximum
Grounding cable size: 2mm2
Selected
Multi-speed selection
Operation status
output
Contact input common
5 (Common)
Open collector
output common
Current input (-)
MC
Open
collector
outputs
Calibration
resistor (*2)
SINK
SOURCE
RS-485 Connector (*1)
Inverter
Main circuit terminal, Control circuit input terminal, Control circuit output terminal
0 to 5VDC
0 to 10VDC
Indicator
1mA full-scale
Analog meter
(Digital indicator)
1mA
(*3)
When using current input as the
frequency setting signal, set "4"
in any of Pr. 60 to Pr. 63 (input
terminal function selection) and
assign AU (current input selection)
to any of terminals RH, RM, RL
and STR.
Take care not to short
terminals PC-SD.
Remarks
*1 Only the type with RS-485 communication function
*2 Not needed when the setting dial is used for calibration. Used when
calibration must be made near the frequency meter for such a reason as a
remote frequency meter. However, the frequency meter needle may not
deflect to full-scale if the calibration resistor is connected. In this case, use
this resistor and setting dial together.
*3 You can switch between the sink and source logic positions. For details, refer
to the instruction manual (detailed).
*4 When the setting potentiometer is used frequently, use a 2W1kΩpotentiometer.
CAUTION
Keep the signal cables more than 10cm (3.94inches) away from the power cables.

6
FR-S520S-0.1K to 1.5K (-R) (-C)
Power supply
NFB R
S
Motor
IM
Earth
(
Ground
)
U
V
W
MC
Remarks
•To ensure safety, connect the power input to the inverter via a magnetic
contactor and earth leakage circuit breaker or no-fuse breaker, and use the
magnetic contactor to switch power on-off.
•The output is three-phase 200V.

7
3.1.1 Layout and wiring of main circuit terminals
FR-S520-0.1K, 0.2K, 0.4K, 0.75K (-R) (-C) FR-S520-1.5K, 2.2K, 3.7K (-R) (-C)
P1
U V W
IM
RST
RST
NP
Jumper
Power
supply Motor
P1
Jumper
R S T U V W
IM
NP
Power
supply Motor
FR-S520S-0.1K, 0.2K, 0.4K, 0.75K (-R) FR-S520S-1.5K (-R)
P1
U V W
IM
NP
RS
Jumpe
r
Power
supply Motor
P1 U V W
IM
NP
RS
Jumper
Power
supply Motor
Screw size: M3.5
Recommended cable size:
2mm2(14 AWG)
Crimping terminal: 2-3.5
Screw tightening torque: 1.2 N⋅m
Overall wiring length:
100m (328.08feet) maximum *
CAUTION
If the wiring length of the 0.1K or 0.2K is
30m (98.43feet) or more, reduce the
carrier frequency to 1kHz.
Screw size: M4
Recommended cable size:
2mm2(14 AWG) (1.5K, 2.2K)
3.5mm2(12 AWG) (3.7K)
Crimping terminal:
2-4 (1.5K, 2.2K), 5.5-4 (3.7K)
Screw tightening torque: 1.5N⋅m
Overall wiring length:
100m (328.08feet) maximum *
* When automatic torque boost is selected in Pr. 98 "automatic torque boost selection
(motor capacity)": 30m (98.43feet) maximum.
CAUTION
•The power supply cables must be connected to R, S, T. If they are connected
to U, V, W, the inverter will be damaged. (Phase sequence need not be
matched.)
(For use with a single-phase power supply, the power supply cables must be
connected to R and S.)
•Connect the motor to U, V, W.
Turning on the forward rotation switch (signal) at this time rotates the motor
counterclockwise when viewed from the load shaft.

8
3.2 Terminal connection diagram (North America version)
FR-S520-0.1K to 3.7K-NA (R)
Earth (Ground)
Grounding resistance 100 maximum
Grounding cable size: 2mm2
Power factor improving
DC reactor
(FR-BEL: Option)
3-phase AC
power supply
NFB R
S
T
PC
External transistor common
24VDC power supply
Contact input common (source)
STF
STR
RH
RM
RL
SD
Forward rotation start
Reverse rotation start
Middle
High
Low
Frequency setting signals (Analog)
10 (+5V)
2
2
3
1
4 to 20mADC (+) 4 (4 to 20mADC)
Frequency
setting
potentiometer
1/2W1k
(*3)
RUN
SE Running
Control input signals
(No voltage input allowed)
Jumper: Remove this
jumper when FR-BEL
is connected.
Motor
IM Earth
(Ground)
Alarm
output
A
B
C
U
V
W
P1
P
N
Selected
Multi-speed selection
Operation status
output
Contact input common
5 (Common)
Open collector
output common
Current input (-)
MC
Open
collector
outputs
SINK
SOURCE
Inverter
Main circuit terminal, Control circuit in
p
ut terminal, Control circuit out
p
ut terminal
0 to 5VDC
0 to 10VDC
(*2)
When using current input as the
frequency setting signal, set "4"
in any of Pr. 60 to Pr. 63 (input
terminal function selection) and
assign AU (current input selection)
to any of terminals RH, RM, RL
and STR.
RS-485 Connector (*1)
AM
5
(+)
(-)
Analog signal
output
(0 to 5VDC)
Take care not to short
terminals PC-SD.
Remarks
*1 Only the type with RS-485 communication function
*2 You can switch between the sink and source logic positions. For details, refer
to the instruction manual (detailed).
*3 When the setting potentiometer is used frequently, use a 2W1kΩpotentiometer.
CAUTION
Keep the signal cables more than 10cm (3.94inches) away from the power cables.

9
3.2.1 Layout and wiring of main circuit terminals
FR-S520-0.1K, 0.2K, 0.4K, 0.75K-NA (R) FR-S520-1.5K, 2.2K, 3.7K-NA (R)
P1
U V W
IM
RST
NP
Jumpe
r
Power
supply Motor
P1
Jumper
R S T U V W
IM
NP
Power
supply Motor
Screw size: M3.5
Recommended cable size:
2mm2(14 AWG)
Crimping terminal: 2-3.5
Screw tightening torque: 1.2 N⋅m
Overall wiring length:
100m (328.08feet) maximum *
CAUTION
If the wiring length of the 0.1K or 0.2K is
30m (98.43feet) or more, reduce the
carrier frequency to 1kHz.
Screw size: M4
Recommended cable size:
2mm2(14 AWG) (1.5K, 2.2K)
3.5mm2(12 AWG) (3.7K)
Crimping terminal:
2-4 (1.5K, 2.2K), 5.5-4 (3.7K)
Screw tightening torque: 1.5N⋅m
Overall wiring length:
100m (328.08feet) maximum *
* When automatic torque boost is selected in Pr. 98 "automatic torque boost selection
(motor capacity)": 30m (98.43feet) maximum.
CAUTION
•The power supply cables must be connected to R, S, T. If they are connected
to U, V, W, the inverter will be damaged. (Phase sequence need not be
matched.)
•Connect the motor to U, V, W.
Turning on the forward rotation switch (signal) at this time rotates the motor
counterclockwise when viewed from the load shaft.
<When single-phase power input is provided for three-phase power input inverter
(NA version only)>
•Reduce the output current.
FR-S520-"K-NA inverter 0.1 0.2 0.4 0.75 1.5 2.2 3.7
Rated output current (A) 0.4 0.8 1.5 2.5 4.0 5.0 7.0
Power supply capacity (kVA) 0.4 0.8 1.5 2.5 4.5 5.5 9.0
AC input power (kW) 1.1 6.4 4.5 6.4 11.2 12.9 17.4
•Set m9 (Pr. 637) "current detection filter".
Setting "801" in the manufacturer setting parameter C8 enables you to set the
m9 parameter.
CAUTION
Parameters other than m9 can also be made to be displayed, but never alter
these since they are manufacturer setting parameters.
m9 Setting Description
0 Single-phase power input
- - -
(Factory setting) Three-phase power input
CAUTION
Always return the C8 parameter to 0 (factory setting) after you have finished the
setting of m9.

10
3.3 Terminal connection diagram (European version)
FR-S520S-0.2K to 1.5K-EC (R)
Earth (Ground)
Grounding resistance 100 maximum
Grounding cable size: 2mm2
Power factor improving
DC reactor
(FR-BEL: Option)
Power supply NFB L1
N
PC
External transistor common
24VDC power supply
Contact input common (source)
STF
STR
RH
RM
RL
SD
Forward rotation start
Reverse rotation start
Middle
High
Low
Frequency setting signals (Analog)
10 (+5V)
2
2
3
1
4 to 20mADC (+) 4 (4 to 20mADC)
Frequency
setting
potentiometer
1/2W1k
(*3)
RUN
SE Running
Control input signals
(No voltage input allowed)
Jumper: Remove this
jumper when FR-BEL
is connected.
Motor
IM Earth
(Ground)
Alarm
output
A
B
C
U
V
W
P1
Selected
Multi-speed selection
Operation status
output
Contact input common
5 (Common)
Open collector
output common
Current input (-)
MC
Open
collector
outputs
SINK
SOURCE
Inverter
Main circuit terminal, Control circuit in
p
ut terminal, Control circuit out
p
ut terminal
0 to 5VDC
0 to 10VDC
(*2)
When using current input as the
frequency setting signal, set "4"
in any of Pr. 60 to Pr. 63 (input
terminal function selection) and
assign AU (current input selection)
to any of terminals RH, RM, RL
and STR.
RS-485 Connector (*1)
AM
5
(+)
(-)
Analog signal
output
(0 to 5VDC)
Take care not to short
terminals PC-SD.
Remarks
*1 Only the type with RS-485 communication function
*2 You can switch between the sink and source logic positions. For details, refer
to the instruction manual (detailed).
*3 When the setting potentiometer is used frequently, use a 2W1kΩpotentiometer.
•The output is three-phase 200V.
CAUTION
•Keep the signal cables more than 10cm (3.94inches) away from the power cables.
•To ensure safety, connect the power input to the inverter via a magnetic
contactor and earth leakage circuit breaker or no-fuse breaker, and use the
magnetic contactor to switch power on-off.

11
3.3.1 Layout and wiring of main circuit terminals
FR-S520S-0.2K, 0.4K, 0.75K-EC (R)
P1
U V W
IM
+
-
L1 N
Power
supply Motor
Jumpe
r
Screw size: M3.5
Recommended cable size: 2mm2(14 AWG)
Crimping terminal: 2-3.5
Screw tightening torque: 1.2 N⋅m
Overall wiring length: 100m (328.08feet) maximum *
CAUTION
If the wiring length of the 0.2K is 30m (98.43feet) or more, reduce the carrier frequency
to 1kHz.
FR-S520S-1.5K-EC (R)
P1 U V W
IM
+
-
L1 N
Jumper
Power
supply Motor
Screw size: M4
Recommended cable size:2mm2(14 AWG)
Crimping terminal: 2-4
Screw tightening torque: 1.5N⋅m
Overall wiring length: 100m (328.08feet) maximum *
Remarks
* When automatic torque boost is selected in Pr. 98 "automatic torque boost
selection (motor capacity)": 30m (98.43feet) maximum.
CAUTION
•For power input wiring, connect L1 to R/L1 of the terminal block and N to
S/L2 of the terminal block.
•Connect the motor to U, V, W.
Turning on the forward rotation switch (signal) at this time rotates the motor
counterclockwise when viewed from the load shaft.
•Do not connect the power supply to U, V and W.

12
3.4 Main Circuit
3.4.1 Explanation of main circuit terminals
Symbol Terminal Name Description
R, S, T* AC power input Connect to the commercial power supply.
U, V, W Inverter output Connect a three-phase squirrel-cage motor.
N <-> DC voltage
common DC voltage common terminal. Not isolated from the power supply and inverter output.
P <+>, P1 Power factor
improving DC
reactor connection
Remove the jumper from across terminals P <+> -P1 and
connect the optional power factor improving DC reactor (FR-
BEL).
Earth (Ground) For grounding the inverter chassis.
Must be earthed.
* R, S, <L1, N> terminals for single-phase power input.
CAUTION
< > Terminal names in parentheses are those of the EC version.
3.5 Control Circuit
3.5.1 Explanation of control circuit terminals
Symbol Terminal Name Description
STF Forward rotation
start Turn on the STF signal
to start forward rotation
and turn it off to stop. A stop command is given if STF
and STR signal turn ON at the
STR Reverse rotation
start Turn on the STF signal
to start reverse rotation
and turn it off to stop.
same time.
Contact input
RH
RM
RL
Multi-speed
selection
You can select multiple speeds by
shorting any of terminals RH, RM
and RL signal.
The priorities of the speed
commands are in order of jog,
multi-speed setting (RH, RM, RL,
REX) and AU.
The terminal function
changes with the
setting of input
terminal function
selection (Pr. 60 to
Pr. 63). (*4)
SD
(*1) Contact input common (sink) Common terminal for contact inputs (terminals STF, STR,
RH, RM, RL) and indicator connection (terminal FM).
Isolated from terminals 5 and SE.
PC
(*1)
External transistor
common
24VDC power
supply
Contact input
common (source)
When connecting the transistor output (open collector
output) of a programmable controller (PLC) etc., connect
the positive external power supply for transistor output to
this terminal to prevent a malfunction due to leakage
current. It can be used as a 24V 0.1A DC power supply
across PC-SD terminals. Acts as the common terminal of
the contact input signals when source logic is selected.
10 Frequency setting
power supply 5VDC, permissible load current 10mA.
2Frequency
setting
(Voltage signal)
Inputting 0 to 5VDC (0 to 10V) provides the maximum
output frequency at 5V (10V) and makes input and output
proportional.
Use Pr. 73 "0 to 5V, 0 to 10V selection" to switch between
5V and 10V.
Input resistance 10kΩ. Maximum permissible input voltage
20V.
Input signals
Frequency setting
4Frequency
setting
(Current signal)
Input 4 to 20mA DC. Factory-adjusted to be 0Hz at 4mA
and 60Hz <50Hz for EC version> at 20mA. Maximum
permissible input current 30mA. Input resistance
approximately. 250Ω.
Turn ON signal AU for current input.
Use any of Pr. 60 to Pr. 63 (input terminal function
selection) to set the AU signal.

13
Symbol Terminal Name Description
Input signals
5Frequency setting input
common
Common terminal for the frequency setting signals
(terminals 2, 4) and indicator connection (terminal AM).
Isolated from terminals SD and SE. Do not connect this
terminal to the ground.
A
B
CAlarm output
1 contact output which indicates that the
protective function of the inverter is
activated to stop output. 230V 0.3A AC,
30V 0.3A DC. No conduction across B-C
(conduction across A-C) when alarm
(error) state.
Conduction across B-C (no conduction
across A-C) when normal. (*6)
Open collector
RUN Inverter running
Low when the inverter output frequency
is the starting frequency or higher
(factory-set to 0.5Hz and changeable),
and High during stop or DC injection
brake operation (*2). Permissible load
24V 0.1A DC
The terminal
function
changes with the
setting of output
terminal function
selection
(Pr. 64, Pr. 65).
(*5)
SE Open collector
common Common terminal for inverter running terminal RUN.
Isolated from terminals 5 and SD.
Pulse
FM
<Japanese>
For meter
Factory setting of output item:
Frequency
Permissible load current 1mA
1440 pulses/s at 60Hz
Output signals
Indicator
Analog
AM
<NA, EC>
Analog signal
output
One selected from output
frequency and motor
current is output.
The output signal is
proportional to the
magnitude of each
monitoring item. Factory setting of output item:
Frequency
Output signal 0 to 5VDC
Permissible load current 1mA
Communication
RS-485
connector
(*3)
Using the parameter unit connection cable (FR-CB201 to
205), the parameter unit (FR-PU04) can be connected.
Communication operation can be performed using RS-485.
*1. Do not connect terminals SD and PC each other or to the ground.
For sink logic, terminal SD acts as the common terminal of contact input. For source
logic, terminal PC acts as the common terminal of contact input.
*2. Low indicates that the open collector output transistor is on (conducts). High indicates
that the transistor is off (does not conduct).
*3. Compatible with only the type having the RS-485 communication function. For details,
refer to the separately available instruction manual (detailed).
*4. RL, RM, RH, RT, AU, STOP, MRS, OH, REX, JOG, RES, X14, X16, (STR) signal
selection
*5. RUN, SU, OL, FU, RY, Y12, Y13, FDN, FUP, RL, LF, ABC signal selection
*6. For compatibility with the European Directive (Low Voltage Directive), the operating
capacity of relay output (A, B, C) should be 30V, 0.3A DC.

14
3.5.2 Arrangement and wiring of control circuit terminals
PC SE RUN 10 2 5 4
SD STFSTR RL RM RH
SD
ABC
....Japanese version
....NA, EC version
FM
<AM>
Loosen the terminal screw and insert the cable into the terminal.
Screw size: M3 (A, B, C terminals), M2 (other than on the left)
Tightening torque: 0.5N⋅m to 0.6N⋅m (A, B, C
terminals)
0.22N⋅m to 0.25N⋅m (other than
the above)
CAUTION
Undertightening can cause cable disconnection
or malfunction. Overtightening can cause a short
circuit or malfunction due to damage to the
screw or unit.
Control circuit terminal block
Cable size: 0.3mm2to 0.75mm2
Screwdriver: Small flat-blade screwdriver
(Tip thickness: 0.4mm (0.02inches)/
tip width: 2.5mm (0.10inches))
Wire the stripped cable after
twisting it to prevent it from
becoming loose.
In addition, do not solder it.*
Cable stripping size
A, B, C
terminals
Other than
the above
(mm (inches))
6 (0.24)
5 (0.20)
*For the bar terminal, refer to the instruction manual (detailed).
3.5.3 Connection to RS-485 connector (only the inverter with RS-485
communication function)
(1) When connecting the parameter unit (FR-PU04)
Use the optional FR-CB2 .
(2) RS-485 communication
Use the RS-485 connector to perform communication operation from a
personal computer etc. By connecting the RS-485 connector to a computer
such as a personal computer, Factory Automation or other computer, by the
communication cable, you can operate/monitor the inverter and read/write the
parameter values using user programs. For further details, refer to the
instruction manual (detailed).
•Standard with which RS-485 connector conforms: EIA Standard RS-485
•Transmission format : Multi-drop link
•Communication speed: Maximum 19200 bps
•Overall extension : 500m (1640.42feet)
CAUTION
Do not plug the connector to a computer LAN board, fax modem socket,
telephone modular connector etc. As they are different in electrical
specifications, the inverter may be damaged.

15
4.OPERATION/CONTROL
<Control panel>
The operation panel cannot be removed from the inverter.
Used to give the forward rotation
operation command. Use Pr. 17
to set reverse rotation.
Turns on/flickers* to indicate operation.
RUN
PU
EXT
MODE SET
RUN
PU
EXT
STOP
RESET
+-
Lit to indicate the PU
operation mode.
Shows the frequency,
parameter number, etc.
EXT indication
Lit to indicate the external
operation mode.
Setting dial
Used to change the frequency
setting and parameter values.
This dial cannot be removed.
Used to switch between the
PU and external operation
mode. (Change the Pr. 79
value to use the combined
mode.)
PU/EXT key
RUN key
STOP/RESET key
Used to stop operation
or reset an alarm.
SET key
Used to define each setting.
Used to change the setting mode.
MODE key
*RUN indication On: Indicates that forward rotation operation is being performed.
Slow flickering (1.4 s cycle): Indicates reverse rotation.
Fast flickering (0.2 s cycle) : Indicates that operation is not
RUN
being performed but the key
was pressed or the start command
was given.
RUN indication
PU indication
3-digit monitor LED
<Basic operation> (Factory setting)
Parameter setting
MODE
Alarm history
MODE
PU
EXT
Press
PU/EXT
key.
Turn setting
dial to match
frequency.
SET
Press
SET
key.
[Operation panel is used for operation]
PU
EXT
Press
PU/EXT
key.
Turn setting dial until
desired parameter
number appears.
SET
Press SET key to
show present setting.
[Parameter setting change]
Turn setting
dial to change
value.
SET
Press SET key
to complete
setting.
Monitor/frequency setting
MODE Press
MODE
key.
Return
After setting is complete,
press key once to
show alarm history,
or twice to show frequency
setting screen.
MODE
Frequency setting has
been written and
completed!!
and frequency flicker.
RUN
Press to start.
STOP
RESET
Press to stop.
Press
MODE
key.
Press
MODE
key.