> For the complete documentation index, see [llms.txt](https://support.senterasensors.com/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.senterasensors.com/home/65r-sensor-user-guide/integration-information/i-o.md). # I/O

## J1 - Power In

Pin	Signal	Type	Description
1	VCC	PWR	10.5 - 26V Input 1A @ 12V Typical
2	VCC	PWR	10.5 - 26V Input 1A @ 12V Typical
3	GND	PWR	N/A
4	GND	PWR	N/A
5	SDA	I/O	I2C - Motor Controller IMU
6	SCL	I/O	I2C - Motor Controller IMU

## J2 - User I/O

Pin	Signal	Type	Description
1	UART2_TX	O	3.3V UART Output - Primary UART
2	UART2_RX	I	3.3V UART Input - Primary UART
3	UART3_TX	O	3.3V UART Output - Secondary UART
4	UART3_RX	I	3.3V UART Input - Secondary UART
5	PPS	I	3.3V Pulse Per Second Input - RTK
6	EVENT_OUT	O	3.3V Event Output - RTK
7	TRIGGER	I	3.3V Trigger
8	RSVD1	I/O	Reserved for future use
9	GND	PWR	N/A
10	GND	PWR	N/A

## J3 - Ethernet

Pin	Signal - 100BASE-T	Signal - 1000BASE-T	Description
1	TX+	BI_DA+	GRN/WHT
2	TX-	BI_DA-	GRN
3	RX+	BI_DB+	ORG/WHT
4	RX-	BI_DB-	ORG
5	N/A	BI_DC+	BLU/WHT
6	N/A	BI_DC-	BLU
7	N/A	BI_DD+	BRN/WHT
8	N/A	BI_DD-	BRN

## J4 - USB-C Used for data transfer to/from sensor. ## J5 - Power Input External Power input 10.5 - 26V Input 1A @ 12V Typical ## Micro-SD Card

User for recording diagnostic log file data. [^1]: --- # 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://support.senterasensors.com/home/65r-sensor-user-guide/integration-information/i-o.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.