3.9 Selecting and Connecting a Dynamic Brake Unit
3-47
3
Wi
ring and
C
onne
ctio
n
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.
The following example shows connecting dynamic brake resistors for the SERVOPACK for one winding.
When connecting dynamic brake resistors for actual operation, refer to the following figure and connect resis-
tors for two windings.
Power supply
for contactor
coil
Power supply
for contactor coil
NO relay
DV
DU
DW
SERVOPACK
For I/O
power supply
24 V
0 V
Dynamic brake resistor
(Auxiliary contacts)
DBON
DB24
Dynamic brake contactor
Main circuit surge
absorption unit
Coil surge
absorption unit
CN115
24 V
DB
47
45
CN1
0 V
DB
