Instruction manual

2 - 2
2. SIGNALS AND WIRING
2.1 Precautions for this chapter
The following items are not described in this chapter. Since these descriptions are the same as those of MR-
J3-
B Servo Amplifier, refer to the MR-J3- B Servo Amplifier Instruction Manual.
Item MR-J3- B Servo Amplifier Instruction Manual
Explanation of power supply system Section 3.3
Signal (device) explanations Section 3.5
Alarm occurrence timing chart Section 3.6
Interfaces Section 3.7 (excluding the internal connection diagram)
SSCNET cable connection Section 3.9
Connection of servo amplifier and servo motor Section 3.10
Servo motor with an electromagnetic brake Section 3.11
Grounding Section 3.12
Control axis selection Section 3.13
2.2 Input power supply circuit
CAUTION
Always connect a magnetic contactor between the main circuit power supply and
L1, 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 is not connected, continuous flow of a large current may cause
a fire when the servo amplifier malfunctions.
Use the trouble signal to switch main circuit power supply off. Otherwise, a
regenerative transistor fault or the like may overheat the regenerative resistor,
causing a fire.
During power-on, do not open or close the motor power line. Otherwise, a
malfunction or faulty may occur.
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
communication is
interrupted. Therefore, the servo amplifier on the rear axis displays "AA" at
the indicator and turns into base circuit shut-off. The servo amplifier stops
with starting dynamic brake.
For details of each signal, refer to section 3.3 of the MR-J3- B Servo
Amplifier Instruction Manual.
During power-on, do not open or close the motor power line. Otherwise, a
malfunction or faulty may occur.
Wire the power supply/main circuit as shown below so that power is shut off and the servo-on command turned
off as soon as an alarm occurs, a servo forced stop is made valid, or a controller forced stop is made valid. A
no-fuse breaker (NFB) must be used with the input cables of the main circuit power supply.