Explanation Of Power Supply System - Mitsubishi Electric MELSERVO-J4 Instruction Manual

3. SIGNALS AND WIRING

3.1.2 Explanation of power supply system

(1) Signal explanations
Symbol
L1/L2/L3
P3/P4
P+/C/D
L11/L21
U/V/W
N-
POINT
For the layout of connector and terminal block, refer to chapter 7 DIMENSIONS.
Connection target
(application)
Supply the following power to L1, L2, and L3.
Main circuit power
Power
supply
3-phase 380 V AC to 480 V AC,
50 Hz/60 Hz
When not using the power factor improving DC reactor, connect P3 and P4. (factory-
wired)
Power factor
improving DC When using the power factor improving DC reactor, disconnect P3 and P4, and
reactor connect the power factor improving DC reactor to P3 and P4.
Refer to section 9.8 for details.
1) MR-J4-350A4(-RJ) or less
When using a servo amplifier built-in regenerative resistor, connect P+ and D.
(factory-wired)
When using a regenerative option, disconnect P+ and D, and connect the
regenerative option to P+ and C.
2) MR-J4-500A4(-RJ) to MR-J4-22KA4(-RJ)
Regenerative
MR-J4-500A4(-RJ) to MR-J4-22KA4(-RJ) do not have D.
option
When using a servo amplifier built-in regenerative resistor, connect P+ and C.
(factory-wired)
When using a regenerative option, disconnect wires of P+ and C for the built-in
regenerative resistor. And then connect wires of the regenerative option to P+
and C.
Refer to section 9.2 to 9.5 for details.
Supply the following power to L11 and L21.
Control circuit
Power
power supply
1-phase 380 V AC to 480 V AC
Connect them to the servo motor power supply (U, V, and W). Connect the servo
Servo motor amplifier power output (U, V, and W) to the servo motor power input (U, V, and W)
power output directly. Do not let a magnetic contactor, etc. intervene. Otherwise, it may cause a
malfunction.
Power This terminal is used for a power regenerative converter, power regenerative
regenerative common converter, and brake unit.
converter
Refer to section 9.3 to 9.5 for details.
Power
regenerative
common converter
Brake unit
Protective earth Connect it to the grounding terminal of the servo motor and to the protective earth
(PE) (PE) of the cabinet for grounding.
Description
Servo amplifier
MR-J4-60A4(-RJ) to MR-J4-22KA4(-RJ)
Servo amplifier
MR-J4-60A4(-RJ) to MR-J4-22KA4(-RJ)
3 - 7
L1/L2/L3
L11/L21