The OBD & INST Connector

The OBD & INST connector is a Male 25-pin Standard D-Type connector.

Pin No	Pin Function
Pin 1	Analog Input 3 - do not apply voltages outside of the -10 to +10V range
Pin 2	Ethernet LAN Receive -
Pin 3	Ethernet LAN Transmit -
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 - When used as input, do not apply voltages outside the 0 to +12V range; 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 12	Digital Input or Output 0 - When used as an input, do not apply voltages outside the 0 to +12V range; 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 14	Analog Input 2 - do not apply voltages outside the -10 to +10V range.
Pin 15	Ethernet LAN Transmit +
Pin 16	Ethernet LAN Receive +
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 - When used as input, do not apply voltages outside the 0 to +12V range; 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

WARNING:

• Don't short circuit or overload any Digital I/O, e.g. If using Digital Input or Output 3 to supply power to power a K-Box or Rebel Dash, do not connect more than 1 K-Box to this output and be careful that no short circuit occurs.

• Overloading (I > 400mA) of Pin 10 (+4.5V Instrumentation) will result in a drop in the output voltage.

• Each End of the CAN bus must be terminated with a 120ohm resistor across CAN H and CAN. 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.