Connection Example - Mitsubishi Electric MELSERVO-J4 Instruction Manual

9. OPTIONS AND PERIPHERAL EQUIPMENT

9.3.3 Connection example

(1) Combination of FR-BU2-H brake unit and FR-BR-H resistor unit
(a) For MR-J4-_A4(-RJ)
Step-down
transformer
MCCB
(Note 1)
Power
supply
(Note 10)
Main circuit power supply
Note 1. For the power supply specifications, refer to section 1.2.1.
2. For the servo amplifier of 5 kW and 7 kW, always 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. Always connect between P3 and P4 terminals. (factory-wired) Use either the power factor improving DC reactor or the power
factor improving AC reactor. When using the power factor improving DC reactor, refer to section 9.8.
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+ to 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 convinence. However, they
can be configured by one.
POINT
EM2 has the same function as EM1 in the torque control mode.
Connecting PR terminal of the brake unit to P+ terminal of the servo amplifier
results in brake unit malfunction. Always connect the PR terminal of the brake
unit to the PR terminal of the resistor unit.
ALM
RA1
Emergency stop switch
Servo amplifier
(Note 9)
MC
L1
L2
L3
L11
L21
(Note 11)
CN1
EM2 42
SON 15
20
DICOM
24 V DC
21
(Note 12) DICOM
OFF
ON
MC
CN1
24 V DC (Note 12)
46
DOCOM
47
DOCOM
48 ALM
P3
(Note 3)
P4
P+
(Note 7)
N-
C
(Note 2)
9 - 21
MC
SK
RA1
FR-BR-H
(Note 5)
TH1
P
TH2
PR
FR-BU2-H
PR MSG
P/+
(Note 4)
N/-
BUE
(Note 6)
SD
(Note 8)
SD
A
B
C