Mitsubishi Electric MELSERVO MR-J3 A Series, Instruction Manual

Page: 307 / 460

12 - 34
12. OPTIONS AND AUXILIARY EQUIPMENT
(2) Connection example
Servo amplifier
FR-BR resistor unit
MC
NFB
L
1
L
2
L
3
L
11
L
21
P
C
N
P/
N/
PR
HA
HB
HC
Alarm
output
PR
P
TH1
TH2
THS
3-phase
200 to
230VAC
or
3-phase
380 to
480VAC
No-fuse breaker
(Note 1)
(Note 1)
FR-BU brake unit
(Note 2)
P
1
P
2
(Note 3)
Note 1. Make up the external sequence to switch the power off when an alarm occurs or when the thermal relay is actuated.
2. When using servo amplifiers of 5kW and 7kW, always remove the lead of built-in regenerative resistor connected to P
terminal and C terminal.
3. Always connect P
1
-P
2
(For 11k to 22kW, connect P-P
1
). (Factory-wired.) When using the power factor improving DC
reactor, refer to section 12.13.
The cables between the servo amplifier and brake unit and between the resistor unit and brake unit
should be as short as possible. The cables longer than 5m should be twisted. If twisted, the cables must
not be longer than 10m.
The cable size should be equal to or larger than the recommended size. See the brake unit instruction
manual. You cannot connect one set of brake unit to two servo amplifiers or two sets of brake units to
one servo amplifier.
P
N
PR
P
N P P
PR
P
PR
PR
P P
N P
N
Servo amplifier Servo amplifier
Brake unit Resistor unit
5m or less 5m or less 10m or less 10m or less
Brake unit
Twist. Twist.
Resistor unit