Magnetic Contactor Control Connector (Cn23) - Mitsubishi Electric -MR-CV User Manual

Magnetic contactor control connector (CN23)

By enabling the magnetic contactor drive output, the main circuit power supply can be automatically shut off when an alarm
occurs in the converter unit and drive unit.
The magnetic contactor drive output can be enabled by setting the rotary switch for converter setting (SW1) of the converter
unit to "0" or "4".
When the magnetic contactor drive output is enabled
The magnetic contactor can be controlled by connecting the magnetic contactor control connector (CN23) to the coil of the
magnetic contactor.
MCCB
3-phase
200 to
240 V AC,
50/60 Hz
*1 When connecting multiple drive units to one converter unit, configure the system to input the emergency stop input of the controller by
the alarm signal of each drive unit, and configure the sequence so that if an alarm occurs in any of the drive units, all the drive units turn
to ready-off. Because the drive units and servo amplifiers coast when in ready-off (emergency stop status from the controller), install a
dynamic brake when stopping the servo motor.
*2 Use the magnetic contactor with an operation delay time (interval between current being applied to the coil until closure of contacts) of
80 ms or less. If forced stop deceleration is enabled when connecting one unit, the bus voltage may drop depending on the main circuit
power supply voltage and operation pattern, causing a dynamic brake deceleration during forced stop deceleration. If dynamic brake
deceleration is not required, delay the time to turn off the magnetic contactor.
*3 Install an overcurrent protection device (molded-case circuit breaker, fuse, etc.).
Page 93 Molded-case circuit breakers, fuses, magnetic contactors
When the converter unit receives a start command from the drive unit, a short circuit occurs between the CN23-1 pin (MC1)
and CN23-3 pin (MC2) connected to the AC power supply, and power is supplied to the control circuit of the magnetic
contactor. When power is supplied to the control circuit of the magnetic contactor, the magnetic contactor is turned on and the
main circuit power supply is turned on to the converter unit.
In the following cases, the converter unit opens the connection between CN23-1 pin (MC1) and CN23-3 pin (MC2) to
automatically turn off the main circuit power supply.
• When an alarm occurs on the converter unit
• When an alarm occurs on the drive unit
• When EM1 (Forced stop) of the converter unit is turned off
• When an STO warning occurs on the drive unit
Drive unit Drive unit
malfunction malfunction
*1 *1
RA1 RA2
AC reactor
*3
Emergency stop
Operation ready
switch
OFF/ON
MR-CV_
*2
MC
L1
L2
L3
CN23
MC1 1
MC2 3
L11
L21
5.1 Example power circuit connections
MC
SK
5 SIGNALS AND WIRING
5
33