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11. OPTIONS AND PERIPHERAL EQUIPMENT
(b) 400 V class
ALM
RA1
Emergency
stop switch
(Note 8) Step-down
transformer
MCCB
(Note 3)
Power
supply
RA2
Dynamic brake
interlock
Note 1. Terminals 13 and 14 are normally open contact outputs. If the external dynamic brake is seized, terminals 13 and 14 will
open. Therefore, configure an external sequence to prevent servo-on.
2. Assign DB (Dynamic brake interlock) in [Pr. PD07] to [Pr. PD09].
3. For power supply specifications, refer to section 1.3.
4. Depending on the main circuit voltage and operation pattern, bus voltage decreases, and that may cause the forced stop
deceleration to shift to the dynamic brake deceleration. When dynamic brake deceleration is not required, slow the time to
turn off the magnetic contactor.
5. Turn off EM2 when the main power circuit power supply is off.
6. The illustration of the 24 V DC power supply is divided between input signal and output signal for convenience. However,
they can be configured by one.
7. Between P3 and P4 is connected by default. When using the power factor improving DC reactor, remove the short bar
between P3 and P4. Refer to section 11.11 for details. Additionally, a power factor improving DC reactor and power factor
improving AC reactor cannot be used simultaneously.
8. Stepdown transformer is required when the coil voltage of the magnetic contactor is 200 V class.
9. The power supply voltage of the inside magnet contactor for 400 V class external dynamic brake DBU-11K-4 and DBU-22K-
4 is restricted as follows. When using these external dynamic brakes, use them within the range of the power supply.
10. The external dynamic brake cannot be used for compliance with SEMI-F47 standard. Do not assign DB (Dynamic brake
interlock) in [Pr. PD07] to [Pr. PD09]. Failure to do so will cause the servo amplifier to become servo-off when an
instantaneous power failure occurs.
Operation ready
OFF
ON
MC
MC
SK
(Note 4)
MC
(Note 7)
(Note 5)
Main circuit
power supply
EM2
DICOM
24 V DC (Note 6)
DICOM
External dynamic brake
DBU-11K-4
DBU-22K-4
Servo amplifier
U
V
W
L1
L2
CN3
24 V DC (Note 6)
L3
3
DOCOM
L11
15
ALM
L21
P3
(Note 2,
DB
10)
P4
CN3
20
5
10
(Note 9)
a
b
Power supply voltage
1-phase 380 V AC to 463 V AC, 50
Hz/60 Hz
11 - 98
U
V
W
E
RA1
RA2
(Note 1)
14
13 U
V W
External dynamic brake
Servo motor
M
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