YASKAWA Sigma-V Series User Manual page 85

 Using NC Contacts for the Dynamic Brake Contactor
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.
SERVOPACK
CN115
24 V
DB
DB24
DBON
0 V
DB
∗
The above figure is for using a dynamic brake contactor with NC contacts. The dynamic brake answer signal (a signal
from NC auxiliary contacts) is input to CN1-45. To indicate an error if the input signal to CN1-45 turns OFF (open)
while the dynamic brake is activated, the Pn515 parameter in the multi-winding drive unit must be set to n.E. If
the dynamic brake answer signal is not used, Pn515 is set to n.8 (default setting).
Note 1. If you assign more than one signal to the same input circuit, OR logic will be used and any of the input signals
will cause the circuit to operate. This may result in unexpected operation.
2. The maximum current for DB24 and DBON is 300 mA.
CN1
47
Dynamic brake contactor
45*
(Auxiliary contacts)
DU
DV
DW
Coil surge
absorption unit
3.10 Selecting and Connecting a Dynamic Brake Unit
For I/O
power supply
24 V 0 V
Dynamic brake resistor
Main circuit surge
absorption unit
3
3-39