Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 69

5.5 Regenerative resistor connection
The regeneration option and servo amplifier cannot be set except as the designated combination.
Failure to observe this could result in fires, so always use the correct combination.
A regenerative resistor must be connected to the spindle drive unit.
Connect the regenerative resistor between the C and P terminals of the spindle drive unit.
The regenerative resistor type differs according to the motor capacity,
load GD2, and frequency of regeneration. Always confirm that the
regenerative resistor is the selected type before connecting. The unit
could be damaged if it is operated with the incorrect resistor connected.
Depending on the frequency of use, the regenerative resistor main unit
may generate heat of 300deg or more. Never install the regenerative
resistor directly on any surface susceptible to heat.
Regenerative resistor
ＦＣＵＡ-ＲＢ□□）
(
or
Regenerative resistor unit
Thermal terminal
(Note) Make sure that the input power is
shut OFF when the thermal relay
functions (when a fault occurs) to
protect the regenerative resistor
from overheating.
∗ The contact turns OFF when
abnormal overheating occurs.
5. Connections
CAUTION
CAUTION
!
DANGER
（Ｒ-ＵＮＩＴ-□□）
Wire the cooling fan power supply.
(200VAC)
Always wire the regenerative resistor using twisted
wire. When using a relay wire, keep the length as
short as possible (5m or less).
Use a noncombustible wire for the relay wire, and
wire so that the regenerative resistor is not
contacted.
Wire size selection table
Model
Ｄ
MDS-B-SPJ2-02
MDS-B-SPJ2-04
MDS-B-SPJ2-075
MDS-B-SPJ2-15
MDS-B-SPJ2-22
MDS-B-SPJ2-37
MDS-B-SPJ2-55
MDS-B-SPJ2-75
MDS-B-SPJ2-110
/110C
5 − 14
Spindle drive unit
ＭＤＳ－Ｂ－ＳＰＪ２
Ｐ Ｃ
CAUTION
! DANGER
Wire
Spindle amplifier terminal
2
(mm )
block screw sized
P, C
2
Refer to section 5.2.3.
2
2
3.5
M4 D ≤ 8mm
3.5
3.5
3.5
M4 D ≤ 9.6mm
3.5
M4 D ≤ 9.6mm
3.5
2
2
2