---
description: >-
  This page is dedicated on how to use the SW emergency button / kill switch /
  cut off button.
---

# How to use the SW emergency button / kill switch / cut off

Add the emergency button / kill switch (Normally Closed, NC) to J21 pin 6 and pin 8 (GND) like in the picture below.

In the SW, please configure it to be an emergency button with: “bms set emergency-button-enable 1”.

This will enable the pull-up resistor on MCU pin PTE8. When the emergency button is pressed, the connection to ground is broken and the pin will be high. This will generate a SW emergency stop and the BMS state machine will go to the FAULT state.

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