Mitsubishi Electric MELSERVO-JN Series, Instruction Manual

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10 - 6
10. CHARACTERISTICS
10.4 Cable flexing life
The flexing life of the cables is shown below. This graph calculated values. Since they are not guaranteed
values, provide a little allowance for these values.
Fle
xin
g l
ife
[ti
m
es]
1 10
7
5 10
7
1 10
8
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
Flexing radius [mm]
a : Long flex life encoder cable
Long flex life motor power cable
Long flex life motor brake cable
b : Standard encoder cable
Standard motor power cable
Standard motor brake cable
a
b
10.5 Inrush currents at power-on of main circuit and control circuit
The following table indicates the inrush currents (reference data) that flow when the maximum permissible
voltage (main circuit power supply: 253VAC, control circuit power supply: 26.4VDC) is applied at the power
supply capacity of 2500kVA and the wiring length of 1m.
Servo amplifier
Inrush currents (A
0
-
P
)
Main circuit power supply (L
1
L
2
) Control circuit power supply (+24V 0V)
MR-JN-10A1/20A1
55A (Attenuated to approx. 15A in 10ms) 25A (Attenuated to approx. 0A in 4 to 6ms)
MR-JN-10A to 40A
130A (Attenuated to approx. 5A in 5ms) 25A (Attenuated to approx. 0A in 4 to 6ms)
Since large inrush currents flow in the main circuit power supply, always use molded-case circuit breakers and
magnetic contactors. (Refer to section 11.6.)
When a circuit protector is used for the main circuit power supply, it is recommended to use the inertia delay
type that will not be tripped by an inrush current.
Always use a circuit protector for the control circuit power supply. (Refer to section 11.11.)