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3. SIGNALS AND WIRING
3.7 Input power supply circuit
CAUTION
Always connect a magnetic contactor (MC) b etween the main circuit power supply
and L1, L2, and L3 of the servo amplifier, and conf igure the wiring to be able to shut
down the power supply on the side of the servo amplifier’s po wer supply. If a
magnetic contactor (MC) is not conn ected, continuous flow of a large current may
cause a fire when the servo amplifier malfunctions.
Use the trouble signal to switch power off. Otherwise, a regenerative transistor
fault or the like may overheat the r egenerative resistor, causing a fire.
3.7.1 Connection example
Wire the power supply and main circuit as shown below so that the servo-on (SON) turns off as soon as
alarm occurrence is detected and power is shut off.
A circuit breaker (NFB) must be used with the input cables of the power supply.
(1) For 3-phase 200 to 230VAC power s upply
RA OFF ON
MC MC
SK
NFB MC
L1
L2
L3
L11
L21
EMG
SON
SG
VDD
COM
ALM RA
3-phase
200 to 230 VAC
Forced stop
Servo-on
Trouble
Servo amplifier
Forced
stop