What is the max drop length of a mid cable?

What is the max drop length of a mid cable?

• A. 8 meters
• B. 4 meters
• C. 10 meters
• D. 6 meters

Answer: (D)

In NMEA 2000 networks, the backbone runs as a trunk with devices connected by short drops. The electrical integrity of the CAN bus relies on keeping those drops within a limited length so the impedance and signal timing stay within spec. The maximum allowed length for a mid-cable drop is six meters. Keeping drops to six meters or shorter helps prevent impedance mismatches, reflections, and timing issues that could lead to missed or corrupted messages on the bus. A shorter drop, like four meters, is still acceptable but not the maximum; longer drops, such as eight or ten meters, would exceed the recommended limit and risk communication problems.

In NMEA 2000 networks, the backbone runs as a trunk with devices connected by short drops. The electrical integrity of the CAN bus relies on keeping those drops within a limited length so the impedance and signal timing stay within spec. The maximum allowed length for a mid-cable drop is six meters. Keeping drops to six meters or shorter helps prevent impedance mismatches, reflections, and timing issues that could lead to missed or corrupted messages on the bus. A shorter drop, like four meters, is still acceptable but not the maximum; longer drops, such as eight or ten meters, would exceed the recommended limit and risk communication problems.