I/O Signal Wiring - Mitsubishi Electric MELSERVO-J4 Instruction Manual

4. STARTUP (WIRING CHECK)
(b) When you use a regenerative option for 5 kW or more servo amplifiers
The lead wire of built-in regenerative resistor connected to P+ terminal and C terminal should not
be connected.
The regenerative option should be connected to P+ terminal and C terminal.
A twisted cable should be used when wiring is over 5 m and under 10 m. (Refer to section 9.2.4.)
(c) When you use a brake unit and power regenerative converter for 5 kW or more servo amplifiers
The lead wire of built-in regenerative resistor connected to P+ terminal and C terminal should not
be connected.
Brake unit, power regenerative converter should be connected to P+ terminal and N- terminal.
(Refer to section 9.3 to 9.4.)
(d) When you use a power regenerative common converter for 11 kW or more servo amplifiers
Power regenerative common converter should be connected to P4 terminal and N- terminal.
(Refer to section 9.5.)
(e) The power factor improving DC reactor should be connected between P3 and P4. (Refer to section
9.8.)

4.2 I/O signal wiring

(1) The I/O signals should be connected correctly.
Use DO forced output to forcibly turn on/off the pins of the CN1/CN3 connector. This function can be
used to perform a wiring check. In this case, switch on the control circuit power supply only.
Refer to "MR-J4-_A(-RJ) Servo Amplifier Instruction Manual" or "MR-J4-_B(-RJ) Servo Amplifier
Instruction Manual" for details of I/O signal connection.
(2) A voltage exceeding 24 V DC is not applied to the pins of the CN1/CN3 connector.
(3) SD and DOCOM of the CN1/CN3 connector is not shorted.
Servo amplifier
Power factor improving
DC reactor
P3
(Note)
P4
Note. Always disconnect between P3 and P4.
Servo amplifier
CN1/CN3
DOCOM
SD
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