3 - 29
3. SIGNALS AND WIRING
3.12 Power line circuit of the MR-J2S-11KB to MR-J2S-22K B
CAUTION
When the servo amplifier has become fault y, switch power off on the amplif ierpower side. Continuous flow of a large current may cause a fire.Switch power off at detection of an alar m. Otherwise, a regenerative braketransistor fault or the like may overh eat the re generative b rake resis tor, caus ing afire.
POINT
The power-on sequence is the same as in Section 3.5.3.3.12.1 Connection exampleWire the power supply/main circuit as show n below so that power i s shut off and the servo- on signalturned off as soon as an alarm occurs, a servo forced stop is made valid, a controller emergency stop, or aservo motor thermal relay alarm is made valid. A no-fuse breaker (NFB) must be used with the inputcables of the power supply.
(Note)
Alarm
RA1
Controller
emergency stop
RA2
L1
L2
L3
L11
L21
VDD
COM
EM1
SG
Servo amplifier
CN2
U
V
W
U
V
W
Dynamic
break Servo motor
HA-LFS series
M
Encoder BU
Fan
RA3
24VDC
power supply
MR-JHSCBL M
cable
BV
BW
MC
SK
ON
MC
OFF
Forced
stop
Servo motor
thermal relay
RA3
NFB MC
Forced stop
OHS2OHS1 Servo motor
thermal relay
(Note3)
3-phase
200 to
230VAC
(Note 2)
Note: 1. Configure up the power supply circuit which switches off the magnetic contactor after detection of
alarm occurrence on the controller side.
2. When using the external dynamic break, refer to section 12. 1. 4.
3. There is no BW when the HA-LFS11K2 is used.