3 Wiring and Connections
28 SD780 Series Servo Technical Manual
B/C/D-volume three-phase wiring diagram
Yellow / green
Surge
absorber
Motor
Fuse
Breaker
MC
MC
ALM+
ALM-
ALM
ALM
ON
OFF
DC 12V~24V
(± 10%)
DC 24V± 10%
CN1
L1
L2
L3
L1C
L2C
220V system input voltage range:
AC 220V(-15%)~240V(+10%)
400V system input voltage range:
AC 380V(-15%)~440V(+10%)
Please connect the U, V, W, and output of the drive
correctly according to the motor cable phase sequence of
the servo motor. The wrong phase sequence will cause the
drive to malfunction.
Do not disconnect short wires between B2 and B3 unless
using an external regenerative braking resistor.
When using an external regenerative braking resistor,
disconnect the short wiring between B2 and B3 and
connect them by the dotted line in the figure.
Be sure to ground the servo drive to avoid electrical damage.
The 24V power supply for electromagnetic braking needs
to be provided by the user and must be isolated from the
12V~24V power supply for the control signal.
Pay attention to the connection of the freewheeling diode.
Reserving the positive & negative poles may damage the drive.
Please make this emergency stop protection circuit.
Electromagnetic contactor package surge absorbing device
at both ends.
EMI
filter
/S-RDY
Emergency button
U
V
W
B1/+
B2
B3
-