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3. SIGNALS AND WIRING
3.5 Power line circuit
CAUTION
When the servo amplifier has become faulty, switch power off on the 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.
3.5.1 Connection example
Wire the power supply/main circuit as shown below so that power is shut off and the servo-on signal
turned off as soon as an alarm occurs, a servo forced stop is made valid, or a controller emergency stop is
made valid. A no-fuse breaker (NFB) must be used with the input cables of the power supply.
(1) For 3-phase 200 to 230VAC power supply
EM1
COM
OFF
ON
MC
MC
SK
NFB MC
L
1
L
2
L
3
L
11
L
21
VDD
SG
(Note)
Alarm
RA1
Controller
emergency stop
RA2
Forced
stop
Servo amplifier
Forced stop
Power supply
3-phase
200 to 230VAC
Note: Configure up the power supply circuit which switches off the magnetic contactor after detection of
alarm occurrence on the controller side.