Rockwell Automation 1336S_F_T_E_R Dynamic Brake or Chopper Connection - Manual (Page 3)

Dynamic Brake or Chopper Connection 3
Inductor/Connection Point
Locations During power up, there can be a racing condition between the time the drive
control board comes alive and verifies all input status and the time the
Chopper control board comes alive and closes its AUX contact. To correct
this condition, Rockwell recommends connecting a programmable CR4 NC
contact at TB2-16 and TB2-17 across the Brake Chopper AUX Contact to
shunt the contact until the BUS is fully charged and the logic inputs are
satisfied. See Table B for recommended programming to provide enough
time for the Chopper AUX contact to close, thus preventing AUX fault in
the drive at power up.
Important: Two different inductors were used — use appropriate drawing
for inductor style in drive to have DB added.
Figure 2
G Frame Drives
!
ATTENTION: To avoid a shock hazard, assure that all
power to the drive has been removed before proceeding. In
addition, verify that the DC bus has discharged by
measuring across the “+DC” and “–DC” terminals of TB1
with a voltmeter. The voltage should be 0.0VDC.
ab1003a
The inductor terminals to connect DC
braking or DC Chopper braking onto the
DC Bus are located in this area. Refer to
additional details on following pages.