RELIANCE 0-51881-3 Redundant channel module

Permissible load to motor inertia when the dynamic brake is used Use the dynamic brake under the load to motor inertia ratio indicated in the following table. If the ratio is higher than this value, the dynamic brake may burn. If there is a possibility that the ratio may exceed the value, contact your local sales office. The values of the permissible load to motor inertia ratio in the table are the values at the maximum rotation speed of the servo motor.

Inrush currents at power-on of main circuit and control circuit POINT 

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 "MR-J4-(DU)_B_-RJ020 MR-J4-T20 Servo Amplifier Instruction Manual" section 11.10 or 14.9.5.) 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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