sh030106u.pdf - 第79页

3. SIG NALS A ND WIRI NG 3 - 2 CAUTION Connect the servo am plifier power output (U/ V/W) to th e servo m ot or pow er input (U/V/W) direct ly. Do not let a magnet ic cont actor, etc . inter ve ne. Otherwise, it may caus…

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3. SIGNALS AND WIRING
3 - 1
3. SIGNALS AND WIRING
WARNING
Any person who is involved in wiring should be fully competent to do the work.
Before wiring, turn off the power and wait for 15 minutes or more until the charge
lamp turns off. Then, confirm that the voltage between P+ and N- is safe with a
voltage tester and others. Otherwise, an electric shock may occur. In addition,
when confirming whether the charge lamp is off or not, always confirm it from the
front of the servo amplifier.
Ground the servo amplifier and servo motor securely.
Do not attempt to wire the servo amplifier and servo motor until they have been
installed. Otherwise, it may cause an electric shock.
The cables should not be damaged, stressed, loaded, or pinched. Otherwise, it
may cause an electric shock.
To avoid an electric shock, insulate the connections of the power supply terminals.
CAUTION
Wire the equipment correctly and securely. Otherwise, the servo motor may
operate unexpectedly, resulting in injury.
Connect cables to the correct terminals. Otherwise, a burst, damage, etc. may
occur.
Ensure that polarity (+/-) is correct. Otherwise, a burst, damage, etc. may occur.
The surge absorbing diode installed to the DC relay for control output should be
fitted in the specified direction. Otherwise, the emergency stop and other
protective circuits may not operate.
DOCOM
24 V DC
Servo amplifier
RA
For sink output interface
Control output
signal
DOCOM
Control output
signal
24 V DC
Servo amplifier
RA
For source output interface
Use a noise filter, etc. to minimize the influence of electromagnetic interference.
Electromagnetic interference may be given to the electronic equipment used near
the servo amplifier.
Do not install a power capacitor, surge killer or radio noise filter (optional FR-BIF(-
H)) with the power line of the servo motor.
When using the regenerative resistor, switch power off with the alarm signal.
Otherwise, a transistor fault or the like may overheat the regenerative resistor,
causing a fire.
Do not modify the equipment.
3. SIGNALS AND WIRING
3 - 2
CAUTION
Connect the servo amplifier power output (U/V/W) to the servo motor power input
(U/V/W) directly. Do not let a magnetic contactor, etc. intervene. Otherwise, it may
cause a malfunction.
U
Servo motor
M
V
W
U
V
W
U
M
V
W
U
V
W
Servo amplifier
Servo motorServo amplifier
Connecting a servo motor of the wrong axis to U, V, W, or CN2 of the servo
amplifier may cause a malfunction.
Before wiring, switch operation, etc., eliminate static electricity. Otherwise, it may
cause a malfunction.
POINT
When you use a linear servo motor, replace the following words in the left to the
words in the right.
Load to motor inertia ratio → Load mass
Torque → Thrust
(Servo motor) speed → (Linear servo motor) speed
3. SIGNALS AND WIRING
3 - 3
3.1 Input power supply circuit
CAUTION
Always connect a magnetic contactor between the power supply and the main
circuit power supply (L1/L2/L3) of the servo amplifier, in order to configure a circuit
that shuts down the power supply on the side of the servo amplifier’s power
supply. If a magnetic contactor is not connected, continuous flow of a large
current may cause a fire when the servo amplifier malfunctions.
Use ALM (Malfunction) to switch main circuit power supply off. Not doing so may
cause a fire when a regenerative transistor malfunctions or the like may overheat
the regenerative resistor.
Check the servo amplifier model, and then input proper voltage to the servo
amplifier power supply. If input voltage exceeds the upper limit, the servo amplifier
will break down.
The servo amplifier has a built-in surge absorber (varistor) to reduce exogenous
noise and to suppress lightning surge. Exogenous noise or lightning surge
deteriorates the varistor characteristics, and the varistor may be damaged. To
prevent a fire, use a molded-case circuit breaker or fuse for input power supply.
Connecting a servo motor of the wrong axis to U, V, W, or CN2 of the servo
amplifier may cause a malfunction.
The N- terminal is not a neutral point of the power supply. Incorrect wiring will
cause a burst, damage, etc.
When insulating the main circuit power supply (L1/L2/L3) and the control circuit
power supply (L11/L21) of the servo amplifier using an isolation transformer, etc.,
connect between L1 and L11 and between L2 and L21 at equipotential.
POINT
Even if alarm has occurred, do not switch off the control circuit power supply.
When the control circuit power supply has been switched off, optical module
does not operate, and optical transmission of SSCNET III/H communication is
interrupted. Therefore, the next axis servo amplifier displays "AA" at the indicator
and turns into base circuit shut-off. The servo motor stops with starting dynamic
brake.
EM2 has the same function as EM1 in the torque control mode.
Connect the 1-phase 200 V AC to 240 V AC power supply to L1 and L3. One of
the connecting destinations is different from MR-J3 Series Servo Amplifier's.
When using MR-J4 as a replacement for MR-J3, be careful not to connect the
power to L2.
When using the MR-J4-_B-RJ servo amplifier with the DC power supply input,
refer to app. 15.
Configure the wiring so that the main circuit power supply is shut off and the servo-on command turned off
after deceleration to a stop due to an alarm occurring, an enabled servo forced stop, or an enabled controller
forced stop. A molded-case circuit breaker (MCCB) must be used with the input cables of the main circuit
power supply.