pcb - How to deal with devices connected via a connectors in schematics?

I have a few sensors (potoresistor, temp sensor...) that connect to the board indirectly. The PCB will have a connector such as the molex 4pin fan connector that will in turn connect to the sensor/device via a short cable.

How do I show this in the schematic and the PCB layout? If I select sensor schematic I would have to manually add the pcb footprint to the component. If I select schematic for the connector then adding a resistor to a random pin of a connector doesn't seem right either.

Answer

I normally choose one of these two options:

1. Draw the sensor as a schematic symbol and have a footprint for the desired connector. The only problem is that the BOM is not complete then (you can either have the sensor or the connector).


2. Draw a symbol for the connector with two connections for each lead in the schematic symbol (so you draw one "symbol" with both the jack and the plug). You can then make a schematic symbol for the sensor and connect it to the other side of the connector. Finally you only give the connector a footprint, and leave the footprint for the sensor out.

An example of a schematic symbol for a connector can be:

Good luck designing your circuit!