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. The minimum bending radius : Min.
45mm.
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 currents at power-on of main circuit and control circuit
For a driver of LECSB2-T8 or less, the inrush current values can change
depending on frequency of turning on/off the power and ambient temperature.
Since large inrush currents flow in the power supplies, always use molded-case circuit breakers and
magnetic contactors. (Refer to section 11.6.)
When circuit protectors are used, it is recommended that the inertia delay type, which is not tripped by an
inrush current, be used.
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 LECSB2-T5 to LECSB2-T9, the inrush currents of the main circuit power
supply is the same.
Main circuit power supply (L1, L2, and L3)
Control circuit power supply (L11 and L21)
LECSB2-T5/ LECSB2-T7/
LECSB2-T8
30 A (attenuated to approx. 3 A in 20 ms)
20 A to 30 A
(attenuated to approx. 1 A in 20 ms)
34 A (attenuated to approx. 7 A in 20 ms)
Lobot encoder cable
Lobot motor power cable
Lobot lock cable
Standard encoder cable
Standard motor power cable
Standard lock cable
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