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(b) When using two or more power supply units within a single NC communication bus system
Two or more power supply units may be required within a single NC communication bus system if the spindle
drive unit capacity is large. The drive unit receiving power (L+, L-) from each power supply unit must always
have NC communication cable connection at the NC side of each power supply unit. In the NC communication
bus connection example below, power supply [1] cannot supply power (L+, L-) to the 6th axis servo drive unit.
For basic connection information, refer to the MDS-DM Series Instruction Manual.
MDS-D-V2
1st/2nd axis
Connected to the NC
Optical
communication
cable
Connections when using two power supply units within a single NC communication bus system
1. The drive unit receiving power (L+, L-) from each power supply unit must always have NC
communication bus connection at the NC side of each power supply unit.
2. If two or more power supply units are connected in the drive system, confirm that the units
CAUTION
are not connected with each other through the L+ and L- lines before turning ON the power.
Also make sure that the total capacity of the drive units connected to the same power
supply unit meets the unit's selected capacity.
MDS-DM-V3
MDS-D-CV
3rd/4th/5th axis
[1]
(CV control axis)
CN4
CN4
M700VS Series Setup Manual
2.1 Connecting and Setting the Drive Unit
MDS-D-V1
MDS-D-SP
6th axis
7th axis
(CV control axis)
Power
cannot be
supplied
MDS-D-CV
[2]
CN4
CN4
11
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Troubleshooting
