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10. CHARACTERISTICS
10 - 7
10.4 Cable bending life
The bending life of the cables is shown below. This graph calculated values. Since they are not guaranteed
values, provide a little allowance for these values.
a: Long bending life encoder cable
Long bending life motor power cable
Long bending life electromagnetic brake cable
SSCNET III cable using long distance cable
b: Standard encoder cable
Standard motor power cable
Standard electromagnetic brake cable
SSCNET III cable using inside panel standard cord
SSCNET III cable using outside panel standard cable
Number of bending times [time]
1 × 10
8
5 × 10
7
1 × 10
7
5 × 10
6
1 × 10
6
5 × 10
5
1 × 10
5
5 × 10
4
1 × 10
4
5 × 10
3
1 × 10
3
Bend radius [mm]
4 7 10 20 40 70 100 200
b
a
10.5 Inrush current at power-on
POINT
The inrush current values can change depending on frequency of turning on/off
the power and ambient temperature.
The following table indicates the inrush currents (reference data) that will flow when 240 V AC is applied at
the power supply capacity of 2500 kVA and the wiring length of 1 m. Even when you use a 1-phase 200 V
AC power supply with MR-JE-10B to MR-JE-200B, the inrush currents will be the same.
Servo amplifier Inrush currents (A
0-P
)
MR-JE-10B, MR-JE-20B,
MR-JE-40B
32 A
(attenuated to approx. 3 A in 20 ms)
MR-JE-70B, MR-JE-100B
36 A
(attenuated to approx. 7 A in 20 ms)
MR-JE-200B, MR-JE-300B
102 A
(attenuated to approx. 12 A in 20 ms)
Since large inrush currents flow in the power supplies, always use molded-case circuit breakers and
magnetic contactors. (Refer to section 11.7.)
When circuit protectors are used, it is recommended that the inertia delay type, which is not tripped by an
inrush current, be used.