3 SIGNALS AND WIRING
3.1 Example power circuit connections
43
3
When the magnetic contactor drive output is enabled
Set the converter setting rotary switch of the power regeneration converter unit to "0" (factory setting).
■
For crossover wiring of L11/L21
*1 Use the magnetic contactor with an operation delay time (interval between current being applied to the coil until closure of contacts) of
80 ms or less. The bus voltage may drop depending on the main circuit power supply voltage and operation pattern, causing a dynamic
brake deceleration during a forced stop deceleration.
*2 To prevent an unexpected restart of the drive unit, configure a circuit that turns off EM2 of the drive unit when the main circuit power
supply is turned off.
*3 Use a configuration that shuts off the main circuit power supply by turning off CVST (converter stop). Assign CVST with [Pr. PD07
Output device selection 1].
*4 When performing forced stop deceleration using EM2, the converter unit shuts off the main circuit power supply by protection
coordination after the servo motor stops.
*5 Install an overcurrent protection device (molded-case circuit breaker, fuse, etc.) to protect the branch circuit.
Page 123 Molded-case circuit breakers, fuses
*6 For wire size and overcurrent protection device selection, refer to the following.
Page 121 Selection example of wires
*7 Use the MR-ACDL_M for the protection coordination cable between the converter unit and the drive unit. Use the MR-ADDL02M for the
protection coordination cable between drive units.
MCCB
MC
*1
L1
L2
L3
1
3
MC1
MC2
L11
L21
L11
L21
L11
L21
L+
L-
U
V
W
MC
SK
RA1
DOCOM
CVST
14
15
DICOM
EM2
8
13
L+
L-
L+
L-
DOCOM
CVST
14
15
DICOM
EM2
8
13
M
U
V
W
E
E
M
*4
*3
*4
CN2_
CN2_
*5*6
RA2
RA1
*3
CN23
CN4
CN40A CN40B
CN8
CN8
CN40A
CN1A
CN40B
CN1B
CN3
CN3
CN1A
CN1B
RA2
*3
AC reactor
Drive unit
Drive unit
Encoder
Encoder
Drive unit
error
Ready for
operation
OFF/ON
Drive unit
error
Emergency
stop switch
Protection
coordination
cable
*7
Protection coordination
cable
*7
Controller
Dedicated
bus bar
Dedicated
bus bar
Short-circuit
connector
(supplied)
Short-circuit
connector
(supplied)
Power regeneration
converter unit