Pulldown on PwrCtrl pin

6 years 6 months ago #29528722 by ASI
Pulldown on PwrCtrl pin was created by ASI
I am using the MBL1650CN controller and the data sheet shows a switch or relay connecting the PwrCtrl pin to ground when you want to disable the motor outputs. I plan on connecting Vmot to battery and using the pwrctrl pin to enable/disable the high current outputs (using a secondary power bus). Is it necessary to connect directly to ground like this, or is it ok to use a pull down resistor to disable the output when I switch off the voltage to the pwrctrl pin?

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6 years 6 months ago #29528723 by Griffin Baker
Replied by Griffin Baker on topic Pulldown on PwrCtrl pin
The power control does not have a direct connection to your motor output; it is for logic control only. If you short the power control to ground, then it turns off the controller.

If you want to disable the motor outputs, you can do so using a switch that will activate either a deadmans switch, safety stop, or emergency stop function.

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6 years 6 months ago #29528724 by ASI
Replied by ASI on topic Pulldown on PwrCtrl pin
OK, that is what I want to occur (turn the controller off by grounding the power control). So my question still stands, is it sufficient to use a pull down resistor on the power control pin or do I need to short to ground?

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6 years 5 months ago #29528728 by Griffin Baker
Replied by Griffin Baker on topic Pulldown on PwrCtrl pin
Short it directly to ground.

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