Mitsubishi Electric Melservo MR-J3-A Instruction Manual page 307

12. OPTIONS AND AUXILIARY EQUIPMENT
(2) Connection example
No-fuse breaker
NFB
3-phase
200 to
230VAC
or
3-phase
380 to
480VAC
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
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.
Servo amplifier
P
N
5m or less
Servo amplifier
(Note 2)
MC
P
L
1
C
L
2
L N
3
P
L
11
P
L
21
-P (For 11k to 22kW, connect P-P
1 2
Brake unit Resistor unit
P P P
PR
N PR
5m or less
P/ PR
N/
1
(Note 3)
2
FR-BU brake unit
). (Factory-wired.) When using the power factor improving DC
1
Servo amplifier
P
N
10m or less
12 - 34
PR
(Note 1)
HA
HB Alarm
output
HC
FR-BR resistor unit
Brake unit Resistor unit
Twist. Twist.
P P
P
PR
N PR
10m or less
P
(Note 1)
TH1
TH2
THS