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3. SIGNALS AND WIRING
3.7 Input power supply circuit
CAUTION
Always connect a magnetic contactor (MC) between the main circuit power supply
and L
1
, L
2
, and L
3
of the servo amplifier, and configure the wiring to be able to shut
down the power supply on the side of the servo amplifier’s power supply. If a
magnetic contactor (MC) is not connected, continuous flow of a large current may
cause a fire when the servo amplifier malfunctions.
Use the trouble (ALM) to switch power off. Otherwise, a regenerative transistor
fault or the like may overheat the regenerative resistor, causing a fire.
POINT
The power supply connector (CNP1) is optional. Purchase it without fail.
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 supply
3-phase
200 to 230 VAC
Emergency stop
Servo-on
Trouble
Servo amplifier
External
power
supply
24VDC
(Note)
RA
OFF
ON
MC
MC
SK
NFB MC
L
1
L2
L3
VIN
EMG
SON
VIN
ALM
SG
RA
CNP1
P
D
C
Emergency
stop
Note. To use the built-in regenerative resistor, be sure to connect across P and D of the power supply connector (CNP1).
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