Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 466

11. MR-D01 EXTENSION I/O UNIT
Note 1. The built-in regenerative resistor is not provided for MR-J4-10A-RJ.
2. For power supply specifications, refer to section 1.3 of "MR-J4-_A_(-RJ) Servo Amplifier Instruction Manual".
3. Servo amplifiers MR-J4-70A-RJ or more have a cooling fan.
4. MR-J4 servo amplifier has P3 and P4 in the upstream of the inrush current suppression circuit. They are different from P1 and
P2 of MR-J3 servo amplifiers.
5. The power factor improving AC reactor can also be used. In this case, the power factor improving DC reactor cannot be used.
When not using the power factor improving DC reactor, short P3 and P4.
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