# Help with Cable Extensions for Drag Link Install

**URL:** <https://forum.onefinitycnc.com/t/help-with-cable-extensions-for-drag-link-install/10379>\
**Category:** Original/PRO Series (Buildbotics) (Gen 1)\
**Created:** [January 14, 2022, 11:58pm UTC](https://forum.onefinitycnc.com/t/help-with-cable-extensions-for-drag-link-install/10379 "2022-01-14T23:58:54Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [January 16, 2022, 1:12am UTC](https://forum.onefinitycnc.com/t/help-with-cable-extensions-for-drag-link-install/10379/4 "2022-01-16T01:12:57Z")

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Hey Rob,

#### Cables

for connecting your new cables to the machine here are the

- Specifications for the [Cable Connectors Used on the Onefinity](https://forum.onefinitycnc.com/t/cable-connectors-used-on-the-onefinity/1886).

For doubt about these Molex/Amphenol connectors and better replacing them everywhere (while you’re at it), please see [here](https://forum.onefinitycnc.com/t/voltage-present/8599/18).

For choosing cables:

- If you have a spindle, see please see [this](https://forum.onefinitycnc.com/t/80mm-upgrade-cable-question/10209/2).
- For the [trim router](https://www.makitatools.com/products/details/RT0701C) and the stepper cables, [here](https://forum.onefinitycnc.com/t/z-axis-vibration-and-misdirection/8900/18).

If you want water cooling hoses later too, I suggest a profile of at least 15x40.

#### Emergency Stop

> [@RPhillips](#):
>
> I’m most likely going to have to replace the power cord on the router as well, which is fine as I’ll be incorporating an E-Stop for the spindle any ways.

An Emergency Stop for a [spindle](https://en.wikipedia.org/wiki/Induction_motor) is NEVER between spindle and [VFD](https://en.wikipedia.org/wiki/Variable-frequency_drive). This is written in the first pages of every VFD manual, even in the cheap Huanyang VFD manual!

An Emergency Stop for a spindle would not power off the VFD either, but activate one of the Intelligent Terminals on the VFD which you would have programmed to serve as [ISO 13849-1](https://en.wikipedia.org/wiki/ISO_13849) Safety Inputs, or similarly programmed to initiate the spindle stop command. You can wire an Emergency stop switch directly to the VFD, or make use of a [ISO 13849](https://en.wikipedia.org/wiki/ISO_13849) [Safety relay](https://en.wikipedia.org/wiki/Safety_relay) such as a [Omron G9SE](https://industrial.omron.co.uk/en/products/g9se) ([datasheet](https://assets.omron.eu/downloads/datasheet/en/v3/j198_g9se_safety_relay_unit_datasheet_en.pdf)), wired as follows:

 ![Omron_MX2__ISO13849-1_Safety](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/b/7/b75f0afa817317c78f748c17dd384d7f63feb960.png)  
(Source: [Omron MX2 User’s Manual](https://assets.omron.eu/downloads/manual/en/v5/i570_mx2_users_manual_en.pdf))

 ![Hitachi_WJ200__ISO13849-1_Safety_Wiring](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/9/9/99e2425030216b657550f3fe2428b60e19e3dc05.png)  
(Source: [Hitachi WJ200 Instruction Manual](https://www.hitachi-iesa.com/sites/default/files/supportdocs/WJ200_Instruction_NT325X.pdf))

#### Further Reading

[Has anyone considered drag chains?](https://forum.onefinitycnc.com/t/has-anyone-else-considered-drag-chains/512/43)

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