Mitsubishi Electric Melservo MR-J3-100B, Handbook

Page: 204 / 590

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
5 - 9
3.2 Magnetic contactor control connector (CNP1)
CAUTION
Always connect the magnetic contactor wiring connector to the converter unit. If
the connector is not connected, an electric shock may occur since CNP1-1 and
L11 are always conducting.
By enabling magnetic contactor drive output, the main circuit power supply can be shut off automatically
when an alarm occurs in the converter unit or the drive unit.
To enable magnetic contactor drive output, set [Pr. PA02] of the converter unit to "_ _ _ 1" (initial value).
Magnetic contactor drive output selection
0: Disabled
1: Enabled
1
[Pr. PA02]
0 0 0
(1) When magnetic contactor drive output is enabled
To control the magnetic contactor, connect the magnetic contactor control connector (CNP1) to the coil
of the magnetic contactor.
Internal connection diagram of CNP1
MCCB
Converter unit
L11
L21
Power
supply
1 MC1
2 MC2
CNP1
RA1 RA2
Converter unit
malfunction
Operation ready
OFF/ON
Drive unit
malfunction
Emergency stop
switch
L1
L2
L3
(Note 1)
MC
SK
(Note 2, 3)
MC
Note 1. A step-down transformer is required when coil voltage of the magnetic contactor is
200 V class, and the converter unit and the drive unit are 400 V class.
2. The bus voltage decreases depending on the main circuit voltage and operation
pattern, which may cause the forced stop deceleration to shift to the dynamic
brake deceleration. When dynamic brake deceleration is not required, delay the
time to turn off the magnetic contactor.
3. When the voltage between L11 and L21 drops due to an instantaneous power
failure and others, the magnetic contactor is turned off.