Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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3 SIGNALS AND WIRING
3.1 Connection example of power circuit
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3
When you use a linear servo motor, replace the following left words to the right words.
Load to motor inertia ratio

Load mass
Torque

Thrust
3.1
Connection example of power circuit
• Even if alarm has occurred, do not switch off the control circuit power supply. When the control circuit power
supply has been switched off, network communication is interrupted. Therefore, the next servo amplifier
displays "AA" at the indicator and turns into base circuit shut-off. The servo motor stops with starting
dynamic brake.
• EM2 has the same function as EM1 in the torque mode.
• When using the MR-J4-_GF-RJ servo amplifier with the DC power supply input, refer to the following.

Page 563 When using the servo amplifier with the DC power supply input
Configure the wiring so that the main circuit power supply is shut off and the servo-on command turns off after deceleration to
a stop due to an alarm occurring, an enabled servo forced stop, or a sudden stop command from controller. A molded-case
circuit breaker (MCCB) must be used with the input cables of the main circuit power supply.
CAUTION
• Always connect a magnetic contactor between the power supply and the main circuit power supply (L1/L2/L3) of the servo amplifier, in order to configure a
circuit that shuts down the power supply on the side of the servo amplifier’s power supply. If a magnetic contactor is not connected, continuous flow of a large
current may cause a fire when the servo amplifier malfunctions.
• Use ALM (Malfunction) to switch main circuit power supply off. Not doing so may cause a fire when a regenerative transistor malfunctions or the like may
overheat the regenerative resistor.
• Check the servo amplifier model, and then input proper voltage to the servo amplifier power supply. If input voltage exceeds the upper limit, the servo
amplifier will break down.
• The servo amplifier has a built-in surge absorber (varistor) to reduce exogenous noise and to suppress lightning surge. Exogenous noise or lightning surge
deteriorates the varistor characteristics, and the varistor may be damaged. To prevent a fire, use a molded-case circuit breaker or fuse for input power
supply.
• Connecting a servo motor of the wrong axis to U, V, W, or CN2 of the servo amplifier may cause a malfunction.
• The N- terminal is not a neutral point of the power supply. Incorrect wiring will cause a burst, damage, etc.