In a properly terminated NMEA2000 network and the power to the network off, the resistance reading between NET-H & NET-L should be:

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Multiple Choice

In a properly terminated NMEA2000 network and the power to the network off, the resistance reading between NET-H & NET-L should be:

Explanation:
NMEA2000 uses CAN bus termination with 120-ohm resistors at each end of the backbone. When the network is properly terminated and power is off, those two 120-ohm terminators are connected across the two conductors (NET-H and NET-L) in parallel. Two 120-ohm resistors in parallel equal 60 ohms (1/60 = 1/120 + 1/120). So the resistance seen between NET-H and NET-L should be 60 ohms. If only one terminator were present you'd expect about 120 ohms, and with no terminators you'd see a much higher, open circuit reading.

NMEA2000 uses CAN bus termination with 120-ohm resistors at each end of the backbone. When the network is properly terminated and power is off, those two 120-ohm terminators are connected across the two conductors (NET-H and NET-L) in parallel. Two 120-ohm resistors in parallel equal 60 ohms (1/60 = 1/120 + 1/120). So the resistance seen between NET-H and NET-L should be 60 ohms. If only one terminator were present you'd expect about 120 ohms, and with no terminators you'd see a much higher, open circuit reading.

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