> 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/6x-series-sensors-user-guide/integration-information/i-o.md). # I/O ## Power In & Expansion Port

### 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

### J2 - Expansion Port

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	+5V0	PWR	+5V0 @ 500mA
10	+3V3	PWR	+3V3 @ 500mA
11	GND	PWR	N/A
12	GND	PWR	N/A

*** ## Ethernet & Power I/O

### J3 - Power I/O

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	I^2C - Motor Controller IMU
6	SDL	I/O	I^2C - Motor Controller IMU

### J4 - 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

*** ## USB-C & Micro SD Card

### J5 - USB-C Used for data transfer to/from sensor. ### J6 - Micro SD Card User for recording diagnostic log file data.