WARNING
Precautions on Use
1. Do not use the product in explosive environments. Failure to follow this-
may cause injury or fire.
2. Do not work on wiring, maintenance servicing, or inspection with the
power on. After turning off the power, wait at least 15 minutes and con-
firm extinction of CHARGE-LED for the main circuit power supply, and
then start working. Failure to follow this may cause electric shock or
product damage.
3. Make sure to ground protective grounding terminals of servo amplifiers
to equipment or control board. The grounding terminals of servo motors
must be connected to protective grounding terminals of servo amplifiers.
Failure to follow this may cause electrical shock.
4. Never touch inside of servo amplifiers with hands. Electrical shock may
result.
5. Do not damage, apply excessive stresses, put heavy things on, or tuck
down cables. Failure to follow this may cause electrical shock.
6. Never touch the rotating part of servo motors during operation. Failure to
follow this may cause injury.
CAUTION
Precautions on Use
1. Use servo amplifiers and servo motors in specified combinations. Failure
to follow this may cause fire or product malfunctions.
2. Only technically qualified personnel should transport, install, wire, oper-
ate, or perform maintenance and inspection on the product. Failure to
follow this may cause electric shock, injury, or fire.
3. Never install products in a location exposed to water, in a corrosive or
flammable gas atmosphere, or in the vicinity of flammable materials. Fail-
ure to follow this may cause fire or product malfunctions.
4. Be careful of the high temperatures generated by the servo amplifier/mo-
tor and peripherals. Failure to follow this may cause burns.
5. Never touch regenerative resistors, servo motors, and the servo ampli-
fier's radiation fins as such parts become hot in operation and remain
hot for a while after power is turned off. Failure to follow this may cause
burns.
6. Designing a safety system that uses the Safe Torque Off function must
be done by individuals who have safety standard expertise and have suf-
ficiently understood the descriptions of the Instruction Manual. Failure to
follow this may cause injury or product failures.
7. Prior to installation, operation, maintenance servicing or inspection, be
sure to read the Instruction Manual and follow the instructions. Failure to
follow this may cause electric shock, injury, or fire.
8. Do not use servo amplifiers and servo motors outside their specified op-
erating ranges. Failure to follow this may cause electric shock, injury, or
product damage.
9. Consult us for use in high-inertia or high-speed applications that generate
high peak regenerative power because these may exceed the capacity of
regenerative resistor wires.
Transportation
10. When transporting products, do not hold cables, servo motor shafts, or
detector parts. Failure to follow this may cause product damage or injury.
11. Handle products with care during transportation to prevent them from
dropping or falling. Failure to do so may cause injury.
Installation
12. Do not stand on products or place heavy objects on top of them. Failure
to do so may cause injury.
13. Make sure that the mounting orientation is correct. Failure to follow this
may cause fire or product malfunctions.
14. Do not drop products or subject them to excessive shock of any kind. Fail-
ure to follow this may cause product failures.
15. Do not obstruct the air intake and exhaust vents. Failure to follow this
may cause fire.
16. Follow the Instruction Manual and give sufficient clearance for the wiring
of the servo amplifier co ntrol board. Failure to follow this may cause fire
or product failures.
17. Unpack product packages right side up. Failure to do so may cause injury.
18. Verify if the product you receive is the product you ordered. Failure to fol-
low this may cause injury or product damage.
19. During installation, be careful that the product does not fall or tip over, as
this can be dangerous. Use eyebolts, if included, for transporting servo
motors. Failure to do so may cause injury.
20. Install the product to incombustible materials such as metals. Failure to
follow this may cause fire.
21. For anti-collision devices, use ones that can sufficiently withstand the
maximum output of the system. Failure to do so may cause injury.
Wiring
22. Perform wiring correctly and securely. Failure to do so may cause injury.
23. Perform wiring work according to the wiring diagrams or the Instruction
Manual. Failure to follow this may cause electric shock or fire.
24. Perform wiring work according to local standards of electrical installations.
Failure to follow this may cause motor burnout or fire.
25. Do not connect commercial power supply to the U, V and W terminals of
servo motors. Failure to follow this may cause fire or product malfunc-
tions.
26. Install safety devices such as circuit breakers in case of short-circuiting of
external wiring. Failure to follow this may cause fire.
27. Do not bind or band the power cable, input/output signal cable and/or en-
coder cable together or pass through the same duct or conduit. Failure to
follow this may cause faulty operation.
28. When connecting an inductive load such as a relay to the control output
signal of the servo amplifier, be sure to connect a surge absorber diode.
Be aware that reverse-connecting the diode polarity may cause servo am-
plifier malfunctions.
29. Do not connect an AC or 90 VDC power supply to the servo motor's 24
VDC brakes. Also, do not connect a 400 VAC power supply to the servo
motor's 200 VAC cooling fans. Failure to follow this may cause motor
burnout or fire.
30. The surge absorber for the servo motor's holding brake relay prolongs the
brake delay time. Therefore, program a sequence taking the delay time
into account. Failure to follow this may result in falls or injury.
31. Do not use half-wave rectifier circuits in power supplies of 24 VDC or 90
VDC brakes. Failure to follow this may cause excessive heating or product
failures.
Control and Operations
32. Do not perform drastic setting changes as such changes may cause un-
stable operation. Failure to do so may cause injury.
33. Test-run a servo motor with the motor position fixed and isolated from
machine systems. Install the motor to the machine system only after the
test is done. Failure to do so may cause injury.
34. The holding brake cannot be used as a dynamic braking, which stops ma-
chines for safety. For that purpose, install stop devices. Failure to do so
may cause injury.
35. In the case of an alarm, make sure to eliminate the cause and ensure
safety before resuming operations. Failure to do so may cause injury.
36. Verify that the input power supply voltage is within the specified range.
Failure to follow this may cause product failures.
37. After a power interruption is restored, avoid getting close to stopped ma-
chines as it may restart suddenly. (Design a safety system to prepare for
such an event.) Failure to do so may cause injury.
38. Do not use servo amplifiers or servo motors that have failed, damaged, or
burnt out. Failure to follow this may cause injury or fire.
39. Immediately stop operation in case of anomaly. Failure to follow this may
cause electric shock, injury, or fire.
40. When using servo motors in vertical axes, install safety devices to prevent
a workpiece from falling even in the event of an alarm. Failure to follow
this may cause injury or product damage.
Maintenance and Inspection
41. Parts and components used in servo amplifiers (such as electrolytic capac-
itors, cooling fans, lithium batteries for encoders, fuses, relays) deteriorate
by aging. Considering the standard replacement period, replace these
parts and components with new ones for preventive maintenance. Failure
to follow this may cause product failures. Contact us when replacing such
parts and components.
42. Never touch terminals and connectors while electricity is supplied. Failure
to follow this may cause electrical shock.
43. Since the frame of servo amplifiers becomes high in temperature, be
careful when conducting maintenance and inspection work. Failure to fol-
low this may cause burns.
44. Contact us for repairs. Disassembling the product by yourself may result
in product failures and render it inoperable.
PROHIBITED
Storage
1. Avoid storing products in locations exposed to rain or water drops, or in
an environment with hazardous gas or liquid. Failure to follow this may
cause malfunctions.
Control and Operations
2. Brakes used in servo motors are holding brakes and must not be used for
dynamic braking. Doing so may damage or break the holding brake.
3. Do not apply static electricity or excessively high voltage to servo motor
encoder cables. Failure to follow this may cause failures.
4. Never rotate standard servo motors continuously by external force when
the amplifier is at Servo OFF state because doing so will heat up the
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