Yaskawa Sigma-5 Series User Manual:: For Use with Large-Capacity Models-Setup. Rotary Motors - Manual (Page 92)

3 Wiring and Connection
3.6.3 Installation Standards
3-44
• If the coil current of NC dynamic brake contactors is 300 mA or higher, obtain an
NO relay that can switch the contactor coil current and voltage and a power supply
for the contactor coil.
3.6.3 Installation Standards
Observe the following installation standards when you use a Yaskawa dynamic brake
unit. Provide at least 70 mm on each side of the unit and at least 200 mm at both the
top and bottom of the unit to enable fan and natural convection cooling.
Power supply
for contactor
coil
Power supply
for contactor coil
NO relay
DV
DU
DW
SERVOPACK
For I/O
power supply
24V 0V
Dynamic brake resistor
(Auxiliary contacts)
DBON
DB24
Dynamic brake contactor
Main circuit surge
absorption unit
Coil surge
absorption unit
CN115
24V
DB
47
45
CN1
0V
DB
70 min. 70 min.
200 min.
200 min.
Mounting
direction
Up
Units: mm