Yaskawa Large Capacity Sigma II Series - Manual (Page 181)

4.8 Special Wiring
4-105
4
4.8.3 Using More Than One Servodrive
The following diagram is an example of the wiring when more than one Servodrive is used.
Note: Wire the system so that the power supply’s phase S is the ground.
Connect the alarm output (ALM) terminals for the three SERVOPACKs in series to enable
alarm detection relay 1RY to operate.
The output transistor is turned OFF when the ALM output signal invokes the alarm state.
Multiple servos can share a single QF or noise filter. Always select a QF or noise filter that
has enough capacity for the total power capacity (load conditions) of those servos. For
details, refer to 7.5.10 Molded-case Circuit Breaker (MCCB) and 7.5.11 Noise Filter.
Power supply
Power
OFF Power
ON
Noise filter
SGDH
SERVOPACK
SGDH
SERVOPACK
SGDH
SERVOPACK
SGMBH
servomotor
SGMBH
servomotor
SGMBH
servomotor
R S T
QF
1KM
SUP
1KM
1RY
+24V
L1
L2
L3
DC24P
CN1
31 ALM+
32 ALM -
0V
M
DC24N
L1
L2
L3
DC24P
CN1
31 ALM+
32 ALM -
DC24N
L1
L2
L3
DC24P
CN1
31 ALM+
32 ALM -
DC24N
M
M
1KM
1RY
24 VDC
+
-