# OBD and INST Connector

<figure><img src="https://1222752003-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdOw3hdDe6gabAGiQZT7A%2Fuploads%2F2Nx2aiAK4DuZD5dPRq8O%2FOBD%20and%20INST%20Connector.png?alt=media&#x26;token=cb341852-808c-4c6d-9e01-ccc937aef46c" alt=""><figcaption><p>25-pin OBD and INSTR Connector</p></figcaption></figure>

<table data-header-hidden><thead><tr><th width="123"></th><th></th></tr></thead><tbody><tr><td><strong>Pin No</strong></td><td><strong>Pin Function</strong></td></tr><tr><td>Pin 1</td><td>Wake-Up pin to wake logger from sleep mode (for use see Appendix 1)</td></tr><tr><td> Pin 4</td><td>Lin 0</td></tr><tr><td>Pin 6</td><td>CAN Bus 1 (Medium Speed Bus) Low Signal</td></tr><tr><td>Pin 7</td><td>CAN Bus 0 (High Speed Bus) Low Signal</td></tr><tr><td>Pin 8</td><td>K-Line (1 wire bus) of ISO 9141</td></tr><tr><td>Pin 9</td><td>4.5-36V Supply Voltage</td></tr><tr><td>Pin 12</td><td><p>Digital Input or Output 0 - When used as an input do not apply voltages outside of the 0 to +12V range, when used as an Output ensure that current draw is not more than 50mA. </p><p>More information on use of this pin can be found in Appendix 2 and 3</p></td></tr><tr><td>Pin 19</td><td>CAN Bus 1 (Medium Speed Bus) High Signal</td></tr><tr><td>Pin 20</td><td>CAN Bus 0 (High Speed Bus) High Signal</td></tr><tr><td>Pin 21</td><td>Ground</td></tr><tr><td>Pin 22</td><td>Power Ground</td></tr><tr><td>Pin 23</td><td>Digital Input or Output 3 (can also be used as a switched power supply +Vd)</td></tr></tbody></table>

{% hint style="info" %}

#### Note:

* Pins not mentioned in the description table(s) are NC.
  {% endhint %}