Connecting a Curtis 1209/1221/1231 motor driver
WARNING: SHOCK OR DAMAGE DANGER
The Curtis 1209/1221/1231 motor controllers do not provide isolation between the high voltage battery and the low voltage circuits.
The "Discharge OK +" output powers the motor controller. Should the BMS decide that the battery is not able to drive the load, it will open that output, shutting down the motor controller.
The "Throttle reduce" outputs nromally do not affect the throttle. Should the BMS decide that the battery is nearly empty, it will srat shunting the throttle, reducing the available motor drive. The resulting sluggishness warns the driver, and prevents high current draw, which would sag the battery voltage.
By reading this page you acknowledge that you understand that this application note is just a suggestion, and that you will not hold Elithion responsible for its accuracy or appropriateness in you application, and that Elithion is not responsible for the fact that other manufacturers change their products in a way that may make these suggestions no longer applicable.