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4. SIGNALS AND WIRING
4.1 Input power supply circuit
CAUTION
Always connect a magnetic contactor (MC) between the main circuit power supply
and L
1, L2, and L3 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.
Wire the power supply and main circuit as shown below so that the servo-on (RYn0) 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.
(1) For 3-phase 200 to 230VAC power supply to MR-J3-10T to MR-J3-350T
DOCOM
NFB MC
L
1
L
2
L
3
RA
P1
P2
P( )
SK
MC
ON
OFF
MC
L
11
L
21
N( )
D
C
PE
U
V
W
2
3
4
1
CN2
24VDC
EMG
CN6 CN6
DOCOM
DICOM
ALM
3-phase
200 to
230VAC
Forced
stop
RA
Servo amplifier
CNP3
CNP1
U
V
W
(Note 5)
CNP2
(Note 1)
(Note 2)
(Note 3)
Encoder cable
Encoder
Trouble
Servo motor
(Note 4)
M
Motor
(Note 4)
Forced stop
Note 1. Always connect P1 and P2. (Factory-wired.) When using the power factor improving DC reactor, refer to section 14.11.
2. Always connect P(
) and D. (Factory-wired.) When using the regenerative option, refer to section 14.2.
3. For encoder cable, use of the option cable is recommended. Refer to section 14.1 for selection of the cable.
4. For the sink I/O interface. For the source I/O interface, refer to section 4.8.3.
5. Refer to section 4.10.