Wiring - Mitsubishi MELDAS MDS-C1 Instruction Manual

2-10-2 Wiring

A typical Y-∆ changeover control circuit is shown below. The contactors MC1 and MC2 are controlled
with the signal from the spindle drive. When one turns ON, the other turns OFF.
U
V
W
Spindle drive
terminal block
MC1: Contactor for Y (star) connection at low-speed regions
MC2: Contactor for ∆ (delta) connection at high-speed regions
2. Wiring and Connection
MC2
MC1
Y (star) - ∆ (delta) changeover circuit
MDS-C1-SP
CN9-8
RA
CN9-8
Coil changeover relay control circuit
U
V
W
X
Y
Z
RA
MC2
MC1
SK
S
T
2 - 43
Spindle motor
RA
MC1
MC2
SK