Notice before Using Products
The products are designed to be used with general industrial devices. When using them, pay sufficient attention to thefollowing points.
・Read the Operation Manual thoroughly prior to placement, assembly and/or operation in order to use the product properly.
・Refrain from modifying or processing the product in any way.
・Contact us or your point of sale for placement or maintenance services of the product.
・Regarding the following uses of the product, contact us or your point of sale for the special care required for operation, maintenanceand management such as multiplexing the system, installing an emergency electric generator set, and so forth.
❶ Use in medical equipment that may have an effect on human life or the human body❷ Use in transportation systems or transport-related equipment such as trains or elevators, that may have an effect on humanlife or the human body

❸ Use in computer systems that may have an impact on society or on the public❹ Use in other devices that have a major impact on human safety or on maintaining public operations
・In addition to the above, contact us or your point of sale for use in an environment where vibrations occur, such as in automobiles ortransportation systems.

・For use in space, aviation, or nuclear power-related applications, contact us or your point of sale.
・The products shown in this catalog are subject to Japanese Export Control Law. Diversion contrary to the law of exporting country isprohibited.

Indication by (Warning Label) on the Product
The following indications are expressed by Warning labels. Indications vary depending on models.
This label is affixed near high voltage parts such as the electrically charged or cover-protected section,
warning of the places where it is likely to cause an electric shock.
This label is affixed near the GND terminals where grounding is required,recommending that the terminals should be well grounded.

Safety Ranks of the Cautions
The following five ranks are provided.
Improper operations or use is most likely to result in serious injury or death.
Improper operations or use is most likely to result in serious injury or death.
Improper operations or use is likely to result in average or minor injury, or in property damage.
In spite of the cautions with thelabel, it may cause serious results.
Either the contents or the labels is describing important cautions to be followed inevitably.
Indicates what must not be done.
Indicates what must be done.

Precautions on Use
1.

Do not use the product in an explosive atmosphere. Doing somay cause injury or fire.
2. Do not work on wiring, maintenance servicing or inspection withthe electric power on. Always turn the power off and wait for
15 minutes or more. Confirm that the main circuit power supply
charging LED is off before starting the work. Failure to do so may
result in an electric shock or damage.
3. The protective ground terminal of the servo amplifier must begrounded to the device or control panel. The servo motor groundterminal must be connected to the protective ground terminalof the servo amplifier. Failure to do so may result in an electricshock.
4. Never touch the internal parts of the servo amplifier. Doing somay cause an electric shock.

5. Do not damage, apply excessive stress, or place a heavy object
on the cable or get it caught between objects. Doing so may
cause an electric shock.
6. Never touch the rotating part of the servo motor during its operation. Doing so may cause injury.

Precautions on Use
1.

Use the servo amplifier and servo motor in the designated combination. Failure to do so may result in a fire or failure.
2. Have a person with specialized knowledge perform transporting,installation, wiring, operation, maintenance or inspection of theproduct. Failure to do so may result in an electric shock, injury or fire.
3. Do not install the product in a damp environment, explosive, flammable or corrosive atmosphere, or near a combustible material.
Doing so may cause a fire or failure.

4. Do not touch the servo amplifier, servo motor or peripheral devices as the temperature becomes very high. Doing so may
cause burns.
5. Do not touch the product while the power is on or for a while after
the power is turned off since the servo amplifier radiator fins, regenerative resistor, and servo motor are very hot. Doing so may
cause burns.
6. Have a person with specialized knowledge of relevant safety
standards read and understand the information listed in the included Instruction Manual before designing the safety systemthat uses the Safe Torque Off function. Failure to do so may resultin injury or failure.
7. Prior to installation, operation, maintenance servicing or inspection, be sure to read the Instruction Manual and follow theinstructions to perform. Failure to do so may result in an electric
shock, injury or fire.
8. Use the servo amplifier and servo motor within the specified
ranges. Failure to do so may result in an electric shock, injury, ordamage.
9. Element wires of the regenerative resistor have an allowed instantaneous capacity. Consult us if the moment of inertia is large
or rotational speed is high and the instantaneous regenerative
current is large.

Transportation

10. Do not carry the product by holding the cable, motor spindle, ordetector section. Doing so may cause a failure or injury.
11. Be careful when carrying the product to prevent it from falling oroverturning. Failure to do so may result in injury.

Placement

12. Do not climb on or place a heavy object on the product. Doing somay cause injury.
13. Ensure that the product is installed in the correct direction. Failure
to do so may result in a fire or failure.
14. Do not drop or expose the product to excessive shock. Doing somay cause a failure.
15. Ensure that the intake and exhaust ports are not blocked and takemeasures to prevent foreign matter from entering. Failure to doso may result in a fire.
16. Place the servo amplifier in the control panel keeping a distancefrom other devices as instructed in the Instruction Manual. Failure
to do so may result in a fire or failure.
17. Ensure that the bottom and top of the box are facing correctly
while unpacking. Failure to do so may result in injury.
18. Confirm that the product is what you ordered. Failure to do so
may result in injury or damage.
19. Be careful when installing the product in order to prevent it fromfalling or overturning. Use eye bolts for servo motors that comewith them. Failure to do so may result in injury.
20. Mount the product on an incombustible material such as metal.
Failure to do so may result in a fire.
21. Setup devices such as a collision safety device so that it sufficiently withstands the maximum output of the system. Failure todo so may result in injury.

Wiring

22. Ensure that wiring has been correctly done. Failure to do so may
result in injury.
23. Perform wiring as instructed in the wiring diagram or the Instruction
Manual. Failure to do so may result in an electric shock or fire.
24. Perform wiring conforming to the electrical Installation standards
or the internal rule. Failure to do so may result in burnout or fire.
25. Do not connect commercial power supplies to U, V, W terminalsof the servo motor. Doing so may cause a fire or failure.
26. Install safety devices such as a breaker to prepare for a shortcircuit of external wiring. Failure to do so may result in a fire.
27. Do not bind the servo motor power cable and I/O signal cableor encoder cable together or pass them through the same duct.
Doing so may cause a malfunction.
28. When connecting an inductive load such as a relay to the control
output signal of the servo amplifier, always connect a diode forsurge absorption. Make sure that the diode is connected in thecorrect polarity direction. Failure to do so may result in a failure ofthe servo amplifier.
29. Do not connect 90 VDC or AC power to the servo motor 24 VDC
brake. Also, do not connect 400 VAC to the servo motor 200 VAC
cooling fan. Doing so may cause burnout or fire.
30. Braking delay time becomes longer due to the surge absorption

element for the servo motor holding brake relay. Use a sequencethat takes the holding delay time into consideration. Failure to doso may result in fall or injury.

Operations

31. Do not make drastic changes or adjustments as they may resultin unstable operation. Doing so may cause injury.
32. When performing a trial operation, fasten the servo motor and disconnect it from the mechanical system. Check the operation, thenconnect it to the machine. Failure to do so may result in injury.
33. The holding brake is not a stopping device to ensure machinesafety. Install a stopping device on the machine to ensure machine safety. Failure to do so may result in injury.
34. When an alarm has been activated, eliminate the cause, ensure
safety, and reset the alarm before resuming operations. Failure to
do so may result in injury.
35. Ensure that the input power supply voltage is within the specified
range. Failure to do so may result in a failure.
36. When the electric power recovers after a momentary interruption, do not approach the devices because the system mayrestart operation by itself. (Design the system ensuring safety incase it restarts on such occasions. ) Doing so may cause injury.
37. Do not use servo amplifiers and servo motors that have had afailure, damage, or burnout. Doing so may cause injury or fire.
38. Stop operations immediately when an emergency occurs. Failure
to do so may result in an electric shock, injury or fire.
39. When using the servo motor with a vertical axis, install a safety
device to prevent the workpiece from falling when an alarm isactivated. Failure to do so may result in injury or damage.

Maintenance and Inspection

40. Parts that are used in servo amplifiers (electrolytic condenser,cooling fan, lithium batteries for the encoder, fuse, relay, etc.) deteriorate over time. As preventive maintenance, replace with newones according to the standard replacement intervals. Contact usfor details. Failure to do so may result in a failure.
41. Never touch the terminals or connectors while the power is on.
Doing so may cause an electric shock.
42. Servo amplifier frames become very hot. Be careful when performing maintenance or inspection. Failure to do so may result in burns.
43. Contact us for repairs. If the product is disassembled by the user,
it may become inoperable. Doing so may cause a failure.

1.

Storage

Avoid storing this product in places exposed to rain or water
drops, or in an environment with hazardous gas or liquid. Failure
to do so may result in a failure.

Operations

2. Do not use the brake built into the servo motor for normal braking
operation as it is a holding brake. Using this brake for braking
damages the brake. Doing so may cause a failure.
3. Do not apply static electricity or high voltage to the encoder cablefor the servo motor. Doing so may cause a failure.
4. With a servo amplifier that has a standard dynamic brake resistor,
never continuously rotate the servo motor externally when theservo is off. Doing so causes the dynamic brake resistor to generate heat, which is very dangerous. Doing so may cause a fire orburns.
5. Applying excessive voltage that exceeds the input voltage range
may cause a part failure. Never use the product with the voltage
exceeding the specified range. Doing so may cause a failure orinjury.
6. Do not turn on and off the power frequently. Turning on and off
the power exceeding 30 times/day, 5 times/hour may cause premature failures of internal parts.
7.

Maintenance and Inspection

Do not disassemble or repair the product. Doing so may cause
fire or an electric shock.
8. Do not measure the insulation resistance or dielectric voltage ofthe product. Doing so may cause damage.
9. Never plug in or unplug a connector with the powerON (hotswapping) as electronic components may be damaged due to thegenerated surge voltage. Doing so may cause an electric shock
or damage.
10. Do not remove the nameplate.

circuit power supply is turned off when an alarm is activated.
Failure to do so may result in uncontrollable operation, injury, fire,or secondary damage.

Storage1.

Avoid direct sunlight and store the product within the specified ambient temperature and humidity range “-20°C to ＋65°
C, 90％ RH orless” (non-condensing). Failure to do so may cause a failure.
2. If the servo amplifier has been stored for a long period (3 years orlonger as a general guide), contact us. The capacitance may havedecreased with the electrolytic condenser due to the long period
storage, which may cause a failure.
3. If the servo motor has been stored for a long period (3 years orlonger as a general guide), contact us. Bearings and brakes must
be checked.

Transportation

4. Excess loading of products on the carrier may cause the load tocollapse. Follow the instructions given on the outside of the package. Failure to do so may result in injury.
5. Use eye bolts that come with servo motors to transport servo
motors. Do not use them to transport devices. Doing so may
cause injury or failure.

Wiring

6. Install an external emergency stop circuit to turn the power off
in the event that operation must be instantly halted. Also, build
a safety circuit outside of the servo amplifier so that the mainOperations

7.

Install an external emergency stop circuit to turn the power off
in the event that operation must be instantly halted. Also, build asafety circuit outside of the servo amplifier so that the main circuit power supply is turned off when an alarm is activated. Failure
to do so may result in uncontrollable operation, injury, fire, or secondary damage.
8. Servo motors are not equipped with any protective devices. Take
protective measures using an over-current protective relay, aground fault interrupter, a protective device from excess temperature, and an emergency stopping device. Failure to do so may
result in injury or fire.
9. Operate this product within the specified ambient temperatureand humidity range.
C to 55°
C/Humidity 90%RH orServo amplifier (temperature 0°
less (non-condensing) )C to 40°
C/Humidity 90%RH or lessServo motor (temperature 0°(non-condensing) )Failure to do so may result in a failure.

Retirement

10. When disposing of a servo amplifier or servo motor, handle it as
general industrial waste.

Guideline for Suppressing Harmonics
Harmonic current generated from devices such as a servo amplifier
may affect other customers if emitted. Therefore, “Guideline for Suppressing Harmonics by Customers Receiving High Voltage or Special
High Voltage” is established by the Ministry of International Trade andIndustry (currently Ministry of Economy).

Refer to the following materials for information on how to calculate
harmonic current.
・“Harmonic current calculation method for specific customers”(JEM-TR225) General Incorporated Association The Japan Electrical Manufacturers’ Association (JEMA)

Servo amplifiers used by specific customers are the target devices(harmonics generator) of this guideline.
Consumers to whom the guideline is applied must determine if harmonic suppression measures are necessary based on the guideline
and take measures for keeping harmonic emission within the limit
specified by the contracted power.
Even for consumers to whom the guideline is not applied, it is recommended to take harmonic suppression measures in order to avoid
troubles due to the harmonics.

For servo amplifiers that have DC type input power supply, determine
if harmonic suppression measures are necessary on the converter(AC-DC converter) side.

Our servo amplifiers fall under the circuit type in the table 1 shown inthe “Guideline for Suppressing Harmonics”.

When harmonic suppression measures are necessary for the servo
amplifier, connect a harmonic suppression reactor.
For harmonic suppression reactors, contact us for details.
AC reactor

Servo amplifier

Commercial
power supply

Servomotor

M

Table 1Servo amplifier model no.

Power supply Circuit classification

Circuit typeRS3□01□□RS3□02□□RS3□03□□RS3□05□□3-Phase

3-Phase bridge(Condenser smooth)3

Single-phase 4

RS3A10□□3-Phase
RS3A15□□
RS3A30□□
RS3PAA27000(Power supply unit for RS3W60□□)

3Single-phase bridge(Condenser smooth,full-wave rectification)
3-Phase bridge(Condenser smooth)

Conversion factor Ki
3-16-pulse converter without reactor K31＝3.4

3-26-pulse converter with reactor(AC side)K32＝1.8

4-3

Without reactor

K43＝2.94-4

With reactor (AC side)

K44＝1.3

3-1

6-pulse converter without reactor K31＝3.4

3-2

6-pulse converter with reactor(AC side)K32＝1.8

Reference materials
・“Guideline for Suppressing Harmonics by Customers Receiving High Voltage or Special High Voltage” (September, 1994) Ministry of International

Trade and Industry (currently Ministry of Economy)

・“Guideline for Suppressing Harmonics” (JEAG 9702-2013) General Incorporated Association The Japan Electric Association
・“Guideline for Suppressing Servo Amplifier Harmonics” (February, 2015) General Incorporated Association The Japan Electrical Manufacturers’

Association (JEMA)・“Harmonic current calculation method for specific customers” (JEM-TR225) General Incorporated Association The Japan Electrical Manufacturers’

Association (JEMA)

・“Guideline for Suppressing Servo Amplifier (input current 20 A or less) Harmonics” (JEM-TR227) General Incorporated Association The Japan

Electrical Manufacturers’ Association (JEMA)