YASKAWA SGD7S

4.3 Wiring the Power Supply to the SERVOPACK
4.3.4 Power Supply Wiring Diagrams
4-21
4
Wiring and Connecting SERVOPACKs
Using More Than One SERVOPACK
Connect the ALM (Servo Alarm) output for these SERVOPACKs in series to operate the alarm
detection relay (1RY).
When a SERVOPACK alarm is activated, the ALM output signal transistor turns OFF.
The following diagram shows the wiring to stop all of the Servomotors when there is an alarm
for any one SERVOPACK.
More than one SERVOPACK can share a single Noise Filter. However, always select a Noise Fil-
ter that has a large enough capacity to handle the total power supply capacity of all the
SERVOPACKs. Be sure to consider the load conditions.
R S T
1QF
2KM
1Ry
+24 V
L1
L2
L3
L1C
0 V
L2C
Power supply
SERVOPACK
Servomotor
Servomotor
M
Servomotor
L1
L2
L3
SERVOPACK
L1
L2
L3
L1C
1D
L2C
SERVOPACK
M
M
Relay
terminal
Relay
terminal
Relay
terminal
Relay
terminal
L1C
L2C
3SA
(For servo alarm
display)
1PL
1KM
2KM
1SA
2SA
31
32
CN1
1KM
1Ry
1KM
ALM+
ALM−
31
32
CN1
ALM−
31
32
CN1
ALM−
1Ry
ALM+
ALM+
2FLT
3FLT
4FLT
Servo power
ON
Servo power
OFF
1QF: Molded-case circuit breaker
1FLT: Noise Filter
2FLT: Noise Filter
3FLT: Noise Filter
4FLT: Noise Filter
1KM: Magnetic Contactor
(for control power supply)
2KM: Magnetic Contactor
(for main circuit power supply)
1Ry: Relay
1PL: Indicator lamp
1SA: Surge Absorber
2SA: Surge Absorber
3SA: Surge Absorber
1D: Flywheel diode
1KM
1FLT