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Maximum Cable Length vs. Data Rate

CAN Bus

Bit Rate Bus Length
1 Mbit/s 30 m
800 kbit/s 50 m
500 kbit/s 100 m
250 kbit/s 250 m
125 kbit/s 500 m
62.5 kbit/s 1000 m

RS-232
Bit Rate Bus Length
115200 bit/s 2.5 m
57600 bit/s 5.0 m
38400 bit/s 7.5 m
19200 bit/s 15 m
9600 bit/s 30 m

USB Cable Length Max - 3 m

Note that you can increase cable length by having in line signal boosters but this is out of the scope of what NovAtel can advise.