Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 358

• 400 V class
Step-down
transformer
MCCB
Power
*1
supply
Main circuit power supply
24 V DC
*1 For the power supply specifications, refer to the following.
Page 30 Servo amplifier standard specifications
*2 For the servo amplifier of 5 kW and 7 kW, be sure to disconnect the lead wire of built-in regenerative resistor, which is connected to P+
and C terminals. For the servo amplifier of 11 kW to 22 kW, do not connect a supplied regenerative resistor to the P+ and C terminals.
*3 Between P3 and P4 is connected by default. When using the power factor improving DC reactor, remove the short bar between P3 and
P4. Additionally, a power factor improving DC reactor and power factor improving AC reactor cannot be used simultaneously.
Page 407 Power factor improving DC reactors
*4 Connect P/+ and N/- terminals of the brake unit to a correct destination. Incorrect connection destination results in servo amplifier and
brake unit malfunction.
*5 Contact rating: 1b contact, 110 V AC, 5 A/220 V AC, 3 A
Normal condition: TH1-TH2 is conducting. Abnormal condition: TH1-TH2 is not conducting.
*6 Contact rating: 230 V AC, 0.3 A/30 V DC, 0.3 A
Normal condition: B-C is conducting./A-C is not conducting. Abnormal condition: B-C is not conducting./A-C is conducting.
*7 Do not connect more than one cable to each P+ and N- terminals of the servo amplifier.
*8 Always connect BUE and SD terminals. (factory-wired)
*9 Depending on the main circuit voltage and operation pattern, bus voltage decreases, and that may cause the forced stop deceleration to
shift to the dynamic brake deceleration. When dynamic brake deceleration is not required, slow the time to turn off the magnetic
contactor.
*10 Configure a circuit to turn off EM2 when the main circuit power is turned off to prevent an unexpected restart of the servo amplifier.
*11 When wires used for L11 and L21 are thinner than wires used for L1, L2, and L3, use a molded-case circuit breaker.
*12 The illustration of the 24 V DC power supply is divided between input signal and output signal for convenience. However, they can be
configured by one.
11 OPTIONS AND PERIPHERAL EQUIPMENT
356
11.3 FR-BU2-(H) brake unit
ALM
RA1
Emergency stop switch
Servo amplifier
*9
MC
L1
L2
L3
L11
L21
*11
CN3
*10
EM2 20
5
DICOM
*12
10
DICOM
OFF
ON
MC
MC
SK
CN3
24 V DC *12
3
DOCOM
15 ALM
RA1
P3
*3
P4
P+
*7
N-
C
*2
FR-BR-H
TH1
*5
P
TH2
PR
FR-BU2-H
PR MSG
P/+ SD
A
*4
N/-
B
C
BUE
*6
SD
*8