
B-65282EN/05 2.SPECIFICATIONS
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(7) Control power supply connection
• Specification of the control power supply voltage for the
αHVi series servo amplifier
Single-phase 200 VAC to 240 VAC (-15%, +10%)
• When the power supply has a neutral point, power can be
supplied from the neutral point and phase voltage to the
control power supply.
When an isolating-transformer is used, connect one phase
of the control power supply to the neutral point on the
secondary side of the isolating-transformer.
(a) Example of connection when the three-phase power supply
voltage of the main circuit is 400 VAC
With the following connection, the control power supply
voltage can be converted to single-phase 200 VAC to 240
VAC (-15%, +10%):
L1
L2
L3
PSM
200R 200S PE
Breaker
5A
CX1A
N
PE
Power source
(b) Example of connection when the three-phase power supply
voltage of the main circuit is 460 VAC to 480 VAC
By using an auto-transformer, ensure that the single-phase
power supply voltage for the control power supply is 200
VAC to 240 VAC (-15%, +10%).
L1
L2
L3
PSM
PE
Breaker
5A
CX1A
N
PE
Power source
200R 200S
Auto-
transformer