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Physical Layer, 250 Kbps, Un-Shielded Twisted Pair (UTP)
This document describes a physical layer utilizing Unshielded Twisted Pair (UTP) cable with extended stub lengths for flexibility in ECU placement and network topology. Also, connectors are not specified.
CAN controllers used on SAE J1939-15 networks must be restricted to use only Classical Frames as defined in ISO 11898-1. A network which may have legacy controllers cannot tolerate FD Frames.
These SAE Recommended Practices are intended for light- and heavy-duty vehicles on- or off-road as well as appropriate stationary applications which use vehicle derived components (e.g., generator sets). Vehicles of interest include, but are not limited to:
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