APPENDIX
App. - 14
App. 4.6.2 Parts having service lives
Service lives of the following parts are listed below. However, the service life vary depending or operating
methods and environment. If any fault is found in the parts, they must be replaced immediately regardless of
their service lives. For parts replacement, please contact your local sales office.
Part name Life guideline
Smoothing capacitor (Note 4) 10 years
Relay
Number of power-on, forced stop and controller forced
stop times: 100 000 times
Number of on and off for STO: 1,000,000 times
Cooling fan 10,000 hours to 30,000 hours (2 years to 3 years)
Rotary servo motor
Approximately 20,000 hours (equipment power supply:
off, ambient temperature: 20 °C)
Approximately 29,000 hours (power-on time ratio: 25%,
ambient temperature: 20 °C) (Note 5)
(Note 1)
MR-J4 1-axis servo
amplifier
Direct drive motor
Approximately 5,000 hours (equipment power supply:
off, ambient temperature: 20 °C)
Approximately 15,000 hours (power-on time ratio: 25%,
ambient temperature: 20 °C) (Note 5)
Rotary servo motor
Approximately 40,000 hours/2 axes, 30,000 hours/3
axes, or 10,000 hours/8 axes
(equipment power supply: off, ambient temperature:
20 °C)
Approximately 55,000 hours/2 axes, 38,000 hours/3
axes, or 15,000 hours/8 axes
(power-on time ratio: 25%, ambient temperature: 20 °C)
(Note 5)
Battery
backup time
(Note 2)
MR-J4 multi-axis servo
amplifier
Direct drive motor
Approximately 10,000 hours/2 axes, 7,000 hours/3
axes, or 5,000 hours/4 axes
(equipment power supply: off, ambient temperature:
20 °C)
Approximately 15,000 hours/2 axes, 13,000 hours/3
axes, or 10,000 hours/4 axes
(power-on time ratio: 25%, ambient temperature: 20 °C)
(Note 5)
(Note 3) Battery life 5 years from date of manufacture
Note 1. The data-holding time by the battery using MR-BAT6V1SET. Replace the batteries within three years since the operation start
whether the power supply of the servo amplifier is on/off. If the battery is used out of specification, [AL. 25 Absolute position
erased] may occur. For other batteries, refer to each servo amplifier instruction manual.
2. The data-holding time by the battery using five MR-BAT6V1s. Replace the batteries within three years since the operation start
whether the power supply of the servo amplifier is on/off. If the battery is used out of specification, [AL. 25 Absolute position
erased] may occur. For other batteries, refer to each servo amplifier instruction manual.
3. Quality of the batteries degrades by the storage condition. The battery life is 5 years from the production date regardless of the
connection status.
4. The characteristic of smoothing capacitor is deteriorated due to ripple currents, etc. The life of the capacitor greatly depends
on ambient temperature and operating conditions. The capacitor will reach the end of its life in 10 years of continuous
operation in normal air-conditioned environment (40 °C surrounding air temperature or less).
5. The power-on time ratio 25% is equivalent to 8 hours power on for a weekday and off for a weekend.
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