> For the complete documentation index, see [llms.txt](https://docs.influxtechnology.com/support_guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.influxtechnology.com/support_guides/pinouts-influx-product-range/cables-and-product-pinouts/rebel-series/rebel-lt/the-obd-and-inst-connector.md). # The OBD & INST Connector The OBD & INST Connector is a Male 25-pin Standard D Type Connector nut.


Pin No	Pin Function
Pin 1	Analog Input 3 - do not apply voltages outside of the -10 to +10V range
Pin 2	NC
Pin 3	NC
Pin 4	Analog Input 1 - do not apply voltages outside of the -10 to +10V range
Pin 5	Wake-Up pin to wake logger from sleep mode (for use, see Appendix 1)
Pin 6	CAN Bus 1 (Medium Speed Bus) Low Signal
Pin 7	CAN Bus 0 (High-Speed Bus) Low Signal
Pin 8	K-Line (1 wire bus) of ISO 9141
Pin 9	4.5-36V Supply Voltage
Pin 10	+4.5V Instrumentation Supply Voltage, ensure that the current drawn is not more than 100mA
Pin 11	Digital Input or Output 2 - Do not apply voltages outside of the 0 to +12V range when used as an input. When used as an Output, ensure that the current drawn is not more than 100mA. More information on the use of this pin can be found in Appendix 2 and 3
Pin 12	Digital Input or Output 0 - Do not apply voltages outside the 0 to +12V range when used as an input. When used as an Output, ensure that the current draw is not more than 100mA. More information on the use of this pin can be found in Appendix 2 and 3
Pin 13	NC
Pin 14	Analog Input 2 - do not apply voltages outside of the -10 to +10V range
Pin 15	NC
Pin 16	NC
Pin 17	Analog Input 0 - do not apply voltages outside of the -10 to +10V range
Pin 18	Analog Ground
Pin 19	CAN Bus 1 (Medium Speed Bus) High Signal
Pin 20	CAN Bus 0 (High-Speed Bus) High Signal
Pin 21	Ground
Pin 22	Power Ground
Pin 23	Digital Input or Output 3 (can also be used as a switched power supply +Vd). When used as an input, do not apply voltages outside of the 0 to +12V range
Pin 24	Digital Input or Output 1 - Do not apply voltages outside of the 0 to +12V range when used as an input. When used as an Output, ensure that the current drawn is not more than 100mA. More information on the use of this pin can be found in Appendix 2 and 3
Pin 25	NC

{% hint style="warning" %} #### WARNING DON'T SHORT CIRCUIT OR OVERLOAD ANY DIGITAL I/O e.g. IF USING DIGITAL INPUT OR OUTPUT 3 TO SUPPLY TO POWER A K-BOX OR REBEL DASH, DO NOT CONNECT MORE THAN ONE K-BOX TO THIS OUTPUT AND BE CAREFUL THAT NO SHORT CIRCUIT OCCURS. {% endhint %} {% hint style="warning" %} #### WARNING OVERLOADING (I > 100mA) ON PIN 10 (+4.5V Instrumentation) WILL RESULT IN A DROP IN THE OUTPUT VOLTAGE. {% endhint %} {% hint style="warning" %} #### WARNING EACH END OF THE CAN BUS MUST BE TERMINATED WITH A 120 OHM RESISTOR ACROSS CAN H AND CAN L. THE LOGGER HAS DIP SWITCHES INSIDE, WHICH MAY BE TURNED OFF IF IT IS AT THE END OF A CAN BUS TO ALLOW THE BUS TO BE TERMINATED. {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.influxtechnology.com/support_guides/pinouts-influx-product-range/cables-and-product-pinouts/rebel-series/rebel-lt/the-obd-and-inst-connector.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.