Example Power Circuit Connections; Drive Unit Termination Settings - Mitsubishi Electric MR-J5D User Manual

3.1

Example power circuit connections

Precautions
• Connect a magnetic contactor between a power supply and the main circuit power supply (L1/L2/L3) of a converter unit to
configure a circuit that shuts off the power supply on the converter unit side because failure of the converter unit may cause
smoke and fire if a magnetic contactor is not connected.
• Use a configuration that shuts off the main circuit power supply with ALM (Malfunction).
• Check the converter unit model and use the correct power supply voltage.
• Exogenous noise or lightning surges may degrade the characteristics of the surge absorber (varistor) built into the
converter unit and damage it.
• Do not shut off the control circuit power supply even if an alarm occurs. If the control circuit power supply is shut off,
network communication will be interrupted.
• In the torque mode, EM2 functions the same as EM1.
• To prevent malfunction, avoid bundling the converter unit/drive unit's power lines (input/output) and signal cables together
or running them parallel to each other. Separate the power lines from the signal cables.
• Provide adequate protection to prevent an unexpected restart after an instantaneous power failure.
• Configure wiring so that the main circuit power supply is shut off and the servo-on command is turned off after deceleration
to a stop due to an alarm occurrence, an enabled servo forced stop, or a quick stop command from the controller. Use a
molded-case circuit breaker (MCCB) with the input cables of the main circuit power supply.

Drive unit termination settings

Set [Pr. PC46.2] and [Pr. PC46.3] in each drive unit as follows according to the configuration of the converter unit and drive
unit.
Number of drive units connected to
one converter unit
1
2 or more
3 SIGNALS AND WIRING
42
3.1 Example power circuit connections
Drive unit position

Far end
Other than at the far end
Servo parameter
[Pr. PC46.2 Protection
coordination multiple
connections selection]
0 (initial value)
1
[Pr. PC46.3 Protection
coordination end terminal
setting]
Setting disabled
1
0 (initial value)