— 10-4 —
10.4.3. Driver Unit
Electrolytic capacitor
Life of the electrolytic condenser largely depends on use conditions. The life of electrolytic
capacitor is approximately 10 years under the condition below. However, we do not guarantee
the life of 10 years even the conditions belows are met, since the unknown electrical over stress
may be applied to the capacitor.
We do not replace the electrolytic capacitor only. Please consult with NSK sales or
representative for replacement.
Table 10-4: Approximated life of electrolytic capacitor
Name of part Function
Approximated
life
Use conditions
Electrolytic
condenser
• Smoothes power
voltage.
• Others
10 years
* This is not the
guaranteed life.
• Annual average of ambient temperature: 30[[[°C]]]
or less
• Average load factor: 80% or less
• Average daily operation time: 20 hours or less
Relays
The Driver Unit contains three relays. Approximated life is 100 000 times of switching.
We do not replace a relay only. Please consult with NSK sales or representative. It requires
replacing the printed circuit board.
Table10-5: Rough idea of life (Relays)
Item Approx. life Definition to count the number of switching
Relay 1 One time: Each power-on
Relay 2 Two times: Each power-on
Relay
100 000
times
Relay 3 One time: Each activation of the dynamic brake (Servo ON/OFF, Alarm/Reset)
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