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13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
(1) Enabling control function of magnetic contactor (parameter No.PA02
1 (initial value))
Connecting the magnetic contactor control connector (CNP1) to the operating coil of the magnetic contactor
enables to control the magnetic contactor.
Converter unit
L
11
L21
Power supply
MC
NFB
1MC1
2MC2
CNP1
Control circuit
power supply
RA3
RA1 RA2
EM1 OFF/ON
SK
Converter
unit trouble
Servo motor
thermal relay
Operation
-ready
Drive unit
trouble
RA4
Controller
forced stop
Forced stop
MC
L
1
L
2
L3
(Note)
Note. Stepdown transformer is required when coil voltage of the magnetic contactor is 200V class, and the converter unit and the drive
unit are 400V class.
When the converter unit receives a start command from the drive unit while the magnetic contactor control
connector (CNP1) is connected to the magnetic contactor (refer to section 13.3.2 (1)), CNP1-2 and L
21
conduct in the converter unit. Then the control circuit power is supplied to turn ON the magnetic contactor
and the main circuit power is supplied to the converter unit.
Either when an alarm occurs on the converter unit or the drive unit while the control function of the magnetic
contactor is enabled, or when the forced stop (EM1) of the converter unit or the drive unit is turned OFF, the
switch between CNP1-2 and L
21 in the converter unit is disconnected and the main circuit power supply is
automatically shut off.
To automatically shut off the main circuit power supply by alarm, enable the control function of the magnetic
contactor.
(2) Disabling control function of magnetic contactor (parameter No.PA02
0)
When not connecting the magnetic contactor control connector (CNP1) to the operating coil of the magnetic
contactor, configure the circuit to shut off the main circuit power supply when detecting an alarm since the
main circuit power supply is not automatically shut off even when an alarm occurs on the converter unit or
the drive unit.