Datasheet

Motor Brake Connection
SBLM23xx Motor Controller Datasheet 7
Motor Brake Connection
Two pins on the motor connector are provided for connection to a motor brake. The output is modulated with a
PWM signal so that a higher voltage can be initially applied to energize the coil, and then reduced to maintain
the brake released while consuming less energy.
Important Warning
The Brk+ is internally connected to the VMOT supply voltage. Exercise care to avoid short circuits
during wiring.
Note that brake outputs activations 1 and 2 are shared with digital outputs 3 and 4 on the 24-pin I/O
connector.
PWM
VMOT
Brk+
Brk-
Brake Coil
FIGURE 6. Brake drive circuit and connection
Controller Mounting
During motor operation, the controller will generate heat that must be evacuated. The published amps rating
can only be fully achieved if adequate cooling is provided. Good conduction cooling can be achieved by having
the bottom surface of the case making direct contact with a metallic surface (chassis, cabinet). The mounting
has to be like that, so that the thermal-safety limits are not exceeded.
Hall Sensors Connection
Connection to the Hall Sensors is done using a special connector on the front side of the controller. The Hall
sensor connector is a 6-pin Molex Microfit 3.0, ref. 43645-0600. Pin assignment is in the table below.
61
6
1
FIGURE 7. Hall Sensors Connector