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2 Wiring and Connection
MITSUBISHI CNC
2 - 34
(2) Spindle drive unit
Disconnect the short wire connected between the P and D terminals, and connect the external option
regenerative resistor unit R1-R2 between the P and C terminals (There is no polarity). The drive unit has an
internal regenerative resistor electronic thermal (software process), and when overheating of the
regenerative resistor is detected, an over-regeneration (alarm 30) is detected. The thermal protector
terminals (AL1, AL2) are used when double-protecting against overheating of the regenerative resistor.
When double-protecting, construct a sequence in which an emergency stop occurs if a current stops flowing
between AL1 and AL2.
MDS-D-SPJ3 has no built-in regenerative resistor. Be sure to connect the external option resistor to it.
1. Be careful when selecting the installation location. Choose a location where foreign matter (cutting
chips, cutting oil, etc.) does not adhere to the external regenerative resistor unit terminal. A short-
circuit between the P and C terminals could lead to drive unit damage.
2. The regenerative resistor generates heat of approximately 100 degrees (or higher, depending on
the installation conditions). Give sufficient consideration to heat dissipation and installation
position.
- Use flame resisting wire.
- Make sure the wires do not contact the regenerative resistor unit.
Always use twisted pair cable to connect to the drive unit, and keep the length of the wiring to 5m or
less.
×
×
MDS-D-SPJ3
CNP2
P
DC
R1
R2
AC1
AC2
AL1
AL2
AC200V
DANGER
CAUTION