I'm using CANbus to communicate between two circuit boards. 120 ohm termination resistors on either end. Transceivers are MCP2561 and ISO1050. Bit rate is in the hundreds of kilobits/second. Medium is four-conductor 22AWG twisted cable, with the other two conductors carrying 9V and signal/power common. I'm not concerned about voltage drop on the power lines, only about signal integrity.
Is there a means by which one might go about estimating the maximum run length of a configuration like this? I don't need an answer down to inches; an order-of-magnitude answer is close enough for my purposes. But I haven't any idea where to start.