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3.2 Connection example
Wire the power supply and main circuits as shown below. A no-fuse breaker (NFB) must be used with the
input cables of the power supply.
Design the circuit so that the servo on signal also turns off as soon as the power is shut off on detection of
alarm occurrence.
(Note 1) Three-phase
200 to 230VAC
or
Single-Phase
230VAC
Note : For a single-phase 230VAC power supply, connect the power supply to L1
and L2 and keep L3 open.
3.3 Power-on sequence
(1) Power-on procedure
1) Always wire the power supply as shown in above Section 3.7.1 using the magnetic contactor with
the main circuit power supply (three-phase 200V: L
up an external sequence to switch off the magnetic contactor as soon as an alarm occurs.
2) Switch on the control circuit power supply L
supply or before switching on the main circuit power supply. If the main circuit power supply is not
on, the display shows the corresponding warning. However, by switching on the main circuit power
supply, the warning disappears and the servo amplifier will operate properly.
3) The servo amplifier can accept the servo-on signal (SON) about 1 second after the main circuit
power supply is switched on. Therefore, when SON is switched on simultaneously with the three-
phase power supply, the base circuit will switch on in about 1 second, and the ready signal (RD) will
switch on in further about 20ms, making the servo amplifier ready to operate.
4) When the reset signal (RES) is switched on, the base circuit is shut off and the servo motor shaft
coasts.
Emergency
stop
RA
NFB
MC
External
emergency stop
Servo on
Trouble
RA
, L
1
, L
11
21
8
ON
OFF
MC
Servo amplifier
L1
L2
L3
L11
L21
EMG
SON
SG
VDD
COM
ALM
, L
, single-phase 230V: L
2
3
simultaneously with the main circuit power
MC
SK
, L
). Configure
1
2
BCN-B11127-479*
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