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.
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
a: Long flex life encoder cable
Long flex life motor power cable
Long flex life electromagnetic brake cable
SSCNET III cable using long distance cable
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
4 7 10 20 40 70 100 200
Bend radius [mm]
b
a
Number of flexing times [time]
10.5 Inrush currents at power-on of main circuit and control circuit
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.
Inrush currents (A
0-P
)
Servo amplifier
Main circuit power supply (L1, L2, and
L3)
Control circuit power supply (L11 and
L21)
MR-J4-10A, MR-J4-20A,
MR-J4-40A, MR-J4-60A
30 A (attenuated to approx. 3 A in 20
ms)
MR-J4-70A, MR-J4-100A
34 A (attenuated to approx. 7 A in 20
ms)
MR-J4-200A, MR-J4-350A
113 A (attenuated to approx. 12 A in 20
ms)
20 A to 30 A (attenuated to approx. 1 A
in 20 ms)
MR-J4-500A
42 A (attenuated to approx. 20 A in 20
ms)
MR-J4-700A
85 A (attenuated to approx. 20 A in 30
ms)
34 A (attenuated to approx. 2 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 11.10.)
When circuit protectors are used, it is recommended that the inertia delay type, which is not tripped by an
inrush current, be used.
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