Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual page 331

13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
(2) Drive unit
The drive unit front view shown is that of the MR-J3-DU30KB4, MR-J3-DU37KB4 or less. Refer to section
13.7 Outline Drawings for the appearances and connector layouts of the MR-J3-DU30KB, MR-J3-DU37KB,
MR-J3-DU45KB4, MR-J3-DU55KB4.
The frames of the CN2 and CN3 connectors are
connected to the PE (earth) terminal in the amplifier.
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CN5 (USB connector)
Refer to section 11.8.
CN3 (I/O signal connector)
Refer to section 3.4.
Connector for the front axis of
CN1A SSCNET cable.
Connector for the rear axis of
CN1B SSCNET cable.
CN2 (Encoder connector)
Refer to section 3.4.