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MDS-D2/DH2 Series Instruction Manual
2.8 Peripheral Control Wiring
(3) Wiring
The illustration below shows the 2 types of changeover that occur after a coil changeover, (a) (star) - Δ(delta)
changeover, and (b) (star)- (star) changeover. As shown in (c), one of the contactors (MC1 or MC2) is turned
ON and the other is turned OFF at all of the coil changeover control circuits.
(a) (star) - Δ(delta) changeover circuit
Coil changeover circuit
<Wiring of motor coil>
connection (MC1:ON MC2:OFF)
connection (MC1:OFF MC2:ON)
POINT
Wire it according to each 6 terminal’s sign (U, V, W, X, Y, Z) of spindle motor for the coil changeover.
U
V
W
Y
Z
U
V
W
MC2
MC1
X
Spindle motor
MC1: Contactor to connect low-speed coil ( -connection)
MC2: Contactor to connect high-speed coil (-connection)
Spindle
drive unit
terminal
YZ
X
U
V
W
W
U
V
Spindle
drive unit
:
The terminal which is assembled
at the contactor ON
X
Y
ZU
V
W
W
U
V
Spindle
drive unit
:The terminal which is assembled
at the contactor ON