The CAN bus input is the input most used on the data of a vehicle with the FMS interface, most solution work with this input, being used to read the J1939 protocol, ISO11922 and proprietary CAN protocols.


Characteristics of the CAN input:

Nominal Input range

0 – 5 Volts

Common mode Input range

7 – 12 Volts

Fail safe input range

40 Volts

Baud rate
Selectable: 33.3k - 1000kb/s
Input protocols

J1939, FMS/J1939, Proprietary, ISO11992, etc..


On the example bellow, you can see the CAN1 and CANgoclick on the schematic of the standard FMS interface wire loom (part no 9164-10):


CAN bus input:

  • CAN 1 Low - Green wire
  • CAN 2 High - White wire
  • CAN CANgoClick port - CAN version port (middle port)


In most of the vehicle solution you just need one CAN input to be able to get all the Vehicle data. In this case you should choose one of the inputs, bellow is a table referring the advantages of both solutions:


Comparing CAN1 wires and CANgoclick

CAN 1 cables

CAN CANgoclick

To request data from a CAN network

Read only CAN network

Firmware's with requested parameters (Example: F8, T0..)

Eliminates liabilities, warranty issues or wrong connection

Wire to wire connection

No wire to wire connection


We always recommend, when possible, to use the CANgoclick because it eliminates any liabilities and warranty issues.

There are vehciles that to get all the data available need two CAN connection, in this cases it is possible to have another CANgoclick connected to the CAN 1 wires and power it by the J1708 port.