What is the maximum backbone length for Heavy cables?

What is the maximum backbone length for Heavy cables?

• A. 100 m
• B. 250 m
• C. 150 m
• D. 500 m

Answer: (B)

In NMEA 2000, the backbone length is limited by signal integrity on the CAN bus, and heavier cables can carry the signal farther because their thicker conductors reduce resistance and voltage drop. This lets the backbone run longer without degrading the CAN signaling at the standard data rate. For Heavy cables, the specified maximum backbone length is 250 meters, which keeps timing and reflections within acceptable limits. If you tried to go much longer, you’d risk slower edges, distortion, and missed messages. So the longest allowable backbone for Heavy cables is 250 meters.

In NMEA 2000, the backbone length is limited by signal integrity on the CAN bus, and heavier cables can carry the signal farther because their thicker conductors reduce resistance and voltage drop. This lets the backbone run longer without degrading the CAN signaling at the standard data rate. For Heavy cables, the specified maximum backbone length is 250 meters, which keeps timing and reflections within acceptable limits. If you tried to go much longer, you’d risk slower edges, distortion, and missed messages. So the longest allowable backbone for Heavy cables is 250 meters.