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5. CONNECTION OF SERVO AMPLIFIER AND DIRECT DRIVE MOTOR
5.1 Connection instructions
CAUTION
This section explains the connection of the direct drive motor power (U/V/W). Use of the optional connector
is recommended for connection between the servo amplifier and direct drive motor. Refer to chapter 6 for
details of the options.
For grounding, connect the grounding lead wire from the direct drive motor to the protective earth (PE)
terminal of the servo amplifier, and then connect the wire from the servo amplifier to the ground via the
protective earth of the cabinet. Do not connect the wire directly to the protective earth of the cabinet.
5.2 Direct drive motor power cable wiring diagram
Fabricate a cable as shown below.
Refer to section 5.3 for the wires used for the cable.
To avoid a malfunction, connect the power supply phases (U/V/W) of the servo
amplifier and the direct drive motor correctly.
Do not connect AC power supply directly to the direct drive motor. Otherwise, it
may cause a malfunction.
POINT
Refer to chapter 6 for the encoder cable.
Cabinet
Servo
amplifier
PE terminal
(Note)
Note. The number of PE terminals of the servo amplifier differs depending on the amplifier
type.
Servo amplifier
U
V
W
(Note)
Note. This grounding is for the MR-J4 1-axis servo amplifier. For the MR-J4 multi-axis
servo amplifier, connect the grounding lead wire to the connector for CNP3_.
Direct drive motor
30 m or less
5 - 2
Direct drive motor
U
V
M
W
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