11 OPTIONS AND PERIPHERAL EQUIPMENT
11.3 FR-BU2-(H) brake unit
359
11
Combination with MT-BR5-(H) resistor unit
■
200 V class
*1 For the power supply specifications, refer to the following.
Page 30 Servo amplifier standard specifications
*2 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: 1a contact, 110 V AC, 5 A/220 V AC, 3 A
Normal condition: TH1-TH2 is not conducting. Abnormal condition: TH1-TH2 is 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.
Emergency stop switch
Servo amplifier
MC
*9
MCCB
Power
supply
*1
L1
L2
L3
L11
L21
ALM
RA1
OFF
MC
ON
MC
SK
P3
P4
*3
P+
N-
C
*2
*7
*11
N/-
P/+
BUE
SD
PR
B
C
A
SD
MSG
*6
*4
FR-BU2
MT-BR5
P
PR
TH2
TH1
*5
*8
15
ALM
EM2
20
24 V DC
*12
DICOM
3
DOCOM
5
DICOM
10
CN3
CN3
RA1
Main circuit
power supply
*10
24 V DC
*12
SK
RA2
RA2
Summary of Contents for MELSERVO-J4 series
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