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3. SIGNALS AND WIRING
3.7 Input power supply circuit
CAUTION
When the servo amplifier has become faulty, switch power off on the servo
amplifier power side. Continuous flow of a large current may cause a fire.
Use the trouble signal to switch power off. Otherwise, a regenerative brake
transistor fault or the like may overheat the regenerative brake resistor, causing a
fire.
3.7.1 Connection example
Wire the power supply and main circuit as shown below so that the servo-on signal turns off as soon as
alarm occurrence is detected and power is shut off.
A no-fuse breaker (NFB) must be used with the input cables of the power supply.
L
1
L
2
L
11
L
21
MCNFB
Servo amplifier
For 1-phase 100VAC or 1-phase 230VAC power supply
Note. Not provided for 1-phase 100 to 120VAC.
1-phase
100 to 120
VAC
or 1-phase
230VAC
L
3
(Note)
MC
MC
SK
NFB MC
L
1
L
2
L
3
L
11
L
21
EMG
SON
SG
VDD
COM
ALM RA
3-phase
2
00 to 230VAC
Servo amplifier
Trouble
Emergency stop
ON
OFF
Emergency
stop
RA
Servo-on