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3 Wiring and Connections
48 SD780 Series Servo Technical Manual
ALM
/S-RDY and other
output terminals
RY
Servo motor
+
-
Breaker
Enconder
电机
Surge
absorber
Brake winding
dedicated power supply
Emergency
button
RY
DC24V
/BK
DC24V
Motor
3. Linear drive output circuit
The following describes the 33-34 (phase A signal), 35-36 (phase B signal), and 19-20 (phase C
signal) terminals of the CN1 port. The output signal (PAO, /PAO, PBO, /PBO) and the origin pulse
signal (PCO, /PCO) of the encoder's serial data are converted into two-phase (A-phase, B-phase)
pulses and output through the line driver output circuit. On the upper device side, please use a
linear receiver circuit.
PAO
PAO-
PBO
PBO-
PCO
PCO-
GND
Twisted wire
220 Ω
~
470Ω
Using a linear receiver is
equivalent
SN
75ALS175
GND
Shelter wire
Servo motor
Please connect shielded
wire according to the
requirements of the
equipment
FG