The OBD & INST Connector

The OBD & INST Connector is a Male 25-pin Standard D Type Connector with nuts.

Male 25-pin Standard D Type Connector

Pin No	Pin Function
Pin 1	Analog Input 3- do not apply voltage outside of the -10 to +10 V range
Pin 2	LIN 1
Pin 3	CAN / CAN FD Bus 3 Low signal
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	NC
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 drawn is not more than 100mA. More information on the use of this pin can be found in Appendix 2 and 3
Pin 13	CAN /CAN FD Bus 2 (Instrumentation Bus) Low Signal
Pin 14	Analog Input 2 - - do not apply voltages outside of the -10 to +10V range
Pin 15	LIN 0
Pin 16	CAN / CAN FD Bus 3 High signal
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 - e.g. to be connected to pin 5 of the OBDII Connector
Pin 22	Power Ground - e.g. to be connected to pin 4 of the OBDII Connector
Pin 23	Digital Input or Output 3 (can also be used as a switched power supply +Vd). Do not apply voltages outside of the 0 to +12V range when used as an input.
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	CAN / CAN FD Bus 2 (Instrumentation Bus) High Signal

WARNING

DON'T SHORT CIRCUIT OR OVERLOAD AND DIGITAL I/O, e.g. IF USING DIGITAL INPUT OUTPUT 3 TO SUPPLY POWER TO POWER A K-BOX OR A REBEL DASH, DO NOT CONNECT MORE THAT 1 K-BOX TO THIS OUTPUT AND BE CAREFUL THAT NO SHORT CIRCUIT OCCURS.

WARNING

OVERLOADING (I > 100mA) OF PIN 10 (+4.5V Instrumentation) WILL RESULT IN A DROP IN THE OUTPUT VOLTAGE.

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 THAT MAY BE TURNED ON IF IT IS AT THE END OF A CAN BUS TO ALLOW THE BUS TO BE TERMINATED EASILY.