We are using a Jrk 12v12 in Pulse Width input mode, controlled by another ECU.
The other ECU has open-collector outputs which pull-down to ground when active and ‘float’ when inactive. So to generate a compatible 5V pulse train we must invert the pulse train timing and need a pull-up to the regulated 5V for the Rx pin.
Does the Rx pin on the Jrk 12v12 have an internal pull-up resistor to the regulated 5V?
If not, what value is recommended?