Rockwell Automation 1336_S_F_T Allen-Bradley Dynamic Braking - Manual (Page 4)

Heavy Duty Dynamic Braking 4
1336-5.64 — July, 2005
Figure 1
Simplified Schematic of Dynamic Brake Module
Dynamic Brake Modules are designed to be applied in parallel if the current
rating is insufficient for the application. One Dynamic Brake Module is the
designated Master Dynamic Brake Module, while any other Modules are
the designated Follower Modules.
Two lights are provided on the front of the enclosure to indicate operation.
• DC Power light illuminates when DC power has been applied to the
Dynamic Brake Module.
• Brake On light flickers when the Chopper Module is operating or
chopping.
Bus Caps
Bus Caps
Crowbar
SCR
Signal
Common
Dynamic
Brake
Resistor
Chopper
Transistor
Chopper Transistor
Voltage Control
To
Voltage
Control
To
Voltage
Control
To
Voltage
Control
To
Crowbar
SCR Gate
Fuse
– DC Bus
+ DC Bus
Fuse
To
Voltage Dividers
Voltage
Divider
Voltage
Divider
FWD
FWD