YASKAWA SGD7S-1R9D Product Manual page 92

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.
Power supply
R S T
1QF
3SA
(For servo alarm
1Ry
Servo power Servo power
ON OFF
1KM
1KM 1Ry
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)
To comply with UL/cUL standards, you must install a branch circuit protective device at the
power supply input section to each SERVOPACK. Refer to the following document for details.
Σ Σ
-7-Series -7S SERVOPACK with 400 V-Input Power Safety Precautions (Manual No.: TOMP C710828 02)
1KM
1FLT
2KM
Relay
terminal
display)
1KM
Relay
terminal
1SA
2KM
2SA
1Ry: Relay
1PL: Indicator lamp
1SA: Surge Absorber
2SA: Surge Absorber
3SA: Surge Absorber
1D: Flywheel diode
4.3 Wiring the Power Supply to the SERVOPACK
4.3.4 Power Supply Wiring Diagrams
AC/DC
L1
SERVOPACK
2FLT L2
L3
24 V
CN1
0 V
3
L1
SERVOPACK
L2
3FLT
L3
Relay
terminal
24 V
CN1
0 V
3
L1
SERVOPACK
4FLT L2
L3
24 V
0 V
CN1
3
Servomotor
M
+24 V
1Ry
ALM+
4
ALM−
1D
Servomotor
M
ALM+
4
ALM−
Servomotor
M
ALM+
4 ALM−
0 V
4-17
4