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14. OPTIONS AND AUXILIARY EQUIPMENT
(2) Connection example
No-fuse breaker
NFB
Power
supply
3-phase
200 to
230VAC
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
-P
1
refer to section 14.11.
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
or less
Servo amplifier
(Note 2)
MC
P
L
1
C
L
2
L
N
3
P
L
11
P
L
21
(For 11k to 22kW, connect P-P
2
Brake unit
Resistor unit
P
P
P
PR
N
PR
5m
5m
or less
P/
PR
N/
1
(Note 3)
2
FR-BU brake unit
). (Factory-wired.) When using the power factor improving DC reactor,
1
Servo amplifier
14 - 28
PR
(Note 1)
HA
HB
Alarm
output
HC
FR-BR resistor unit
Brake unit
Twist.
Twist.
P
P
P
N
N
PR
10m
10m
or less
or less
P
(Note 1)
TH1
TH2
THS
Resistor unit
P
PR
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