Comau C3G Plus - C3 G-DBU3 Dynamic Braking Unit

C3G-DBU3 DYNAMIC BRAKING UNIT
The DBU3 module is a hardware device which increases the safety of the robot. The module cuts in short circuiting the system DC Bus
through suitable resistance, offering a braking effect on the axis which would tend to fall in the event of a fault.
The DBU3 module is active at DRIVE OFF and also when the robot is in the rest condition, but connected to the controller.
FRONT PANEL
MEANING
Connector Function
X114 110 Vac supply to power contactors K101/K102 and DRIVE ON PULSE
signals
REPLACEMENTS
Specific cautions:
·
Comply with the “GENERAL RULES FOR MAINTENANCE” given in this chapter.
·
In module replacement operations:
-
Open the control unit main switch
-
Disconnect the connection cables to the DC Bus (①) from terminal strip X119
-
Disconnect connector X114 on the DBU3 module
-
Slacken the fastening screws and remove the module carefully
-
Insert the new module positioning the connection cables accurately
-
Connect the cables of the module (①) to terminal strip X119
-
Connect connector X114
If the module is partially removed from its slot but not disconnected electrically, the maintenance operator may be in
a potentially dangerous condition as the module is powered.
Special tools: unnecessary
C3G Plus MAINTENANCE
07/1200 7-49
LAYOUT
C3G-DBU3
Connection to DC BUS from SAU2 (terminal strip X119/PDP)