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Cutout Brake

Introduction

When operating locally, a motor cutout can be enabled to prevent the motor from engaging. This page provides an overview of the available inputs and instructions for configuring the corresponding parameters.

Wiring

A single-throw switch is typically used as the input source and can be connected to Cruise/Digital Input 1, PFS/Digital Input 2, Brake 1, or Brake 2.

When connecting to a digital input, note that these inputs are internally pulled up, so the switch should be wired between GND and the selected digital input.

If connecting to an analog brake input, ensure that the input is configured with a pull-up resistor.

Configuration

  1. Select the Cutoff brake sensor source (address 248)

  2. Enable the brake and verify ebike flags bit 1 Cutout is active

Dual cutoff sources

In firmware 6.025 and higher, you can configure a second cutoff input alongside the first. If either cutoff source is active, the controller cuts torque. Both cutoff sources must be idle before the controller provides torque again.

  1. Set the Secondary Cutoff brake sensor source (address 2005) to the second input. It has the same options as the Cutoff brake sensor source.
  2. Enable Features4 bit 12 Dual cutoff sources (address 1974).

Shared regen and cutoff input

In firmware 6.024 and higher, a single input can act as either a cutoff or a regen brake, depending on vehicle speed. When the input is active:

  • Above the Vehicle Speed threshold for Regen and Cutoff, the controller applies regen braking.

  • Below this threshold, the controller treats the input as an active cutoff.

  • Configure regen braking as described in Regen, using an analog input that can also be used as a cutoff source: set Regen brake source to Brake1 or Brake2, and enable Features bit 4 Analog braking enable.

  • Set the Cutoff brake sensor source (address 248) to the same input.
  • Enable Features4 bit 4 Regen and Cutoff on single source.
  • Set the Vehicle Speed threshold for Regen and Cutoff (address 1984) to the speed at which the input switches between cutoff and regen behaviour.