Rockwell Automation AK DBU - Dynamic Braking Unit 600/690 VAC - Manual (Page 9)

Overview P-5
Figure P.1 shows the block diagram of the DBU with the Dynamic Brake
Resistor. The DBU is shown connected to the positive (DC+) and nega-
tive (DC-) terminals of an AC PWM Drive.
Figure P.1 Block diagram of Inverter with Dynamic Braking Unit
DC-
DC+ BR1
PE DBU
DC Power on Brake on
10
11
0
115
M
Transistor
Control
BUC
RC
Snubber
PE
BUB
DC+
DC-
BR2
> °C
> °C
Inverter
F2
to customer's
supplied
115 VAC
power source
to inverter's
main contactor
circuit
to inverter's main
contactor circuit
to customer grounding scheme
or earth ground
R
Field
installed
Fuses
F1