# Where to Plug In Emergency Stop Button aka latest Machine Documentation caught lacking **URL:** \ **Category:** Ray (Laser)\ **Created:** [November 28, 2023, 6:42pm UTC](https://forum.snapmaker.com/t/where-to-plug-in-emergency-stop-button-aka-latest-machine-documentation-caught-lacking/33847 "2023-11-28T18:42:42Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [November 28, 2023, 7:14pm UTC](https://forum.snapmaker.com/t/where-to-plug-in-emergency-stop-button-aka-latest-machine-documentation-caught-lacking/33847/2 "2023-11-28T19:14:53Z")
Can hub is a simple pcb, it should work anyway. > [@CAN Hub - no electronics inside](https://forum.snapmaker.com/t/can-hub-no-electronics-inside/27109/4): > > I think there is no resistor at all - if you look closely at this PCB, there is only a dedicated place but there is no physical component. This would be confirmed by the diagram made by @Ronin and shown in this film. By the way - the CAN bus needs a terminator at the beginning and end of the line. The use of a hub device in the CAN network with a linear structure makes a tree structure - it differs a bit from the rules of the CAN bus . The use of resistors in the middle of the CAN network woul… --- _[View the full topic](https://forum.snapmaker.com/t/where-to-plug-in-emergency-stop-button-aka-latest-machine-documentation-caught-lacking/33847)._