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| How is the Mini Powertap wired? |
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Article Details
Last Updated:
July 7, 2010
Article ID:
471
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The Mini Powertap has 4 connection points. There are two 5-pin connectors on opposite sides of the powertap that are used as the NMEA 2000 bus connections (marked "BUS"), there is a 4-pin connector on the bottom of the powertap that is used as the power connection (marked "Supply"), and there is a threaded stud with bolt connection for the shield connection. The yellow powertap cable, which plugs into the 4-pin connector found on the bottom of the powertap, is connected to an appropriate 12 volt DC power source. The color coding is as follows:
Red connected to +12 VDC
White connected to +12 VDC
Black connected to Ground
Green Connected to Ground
The powertap is capable of handling 16 amps, 8 amps for both NMEA 2000 bus connections.The Schotky diodes are used to isolate the power supply connected to the powertap from other power supplies connected elsewhere to the network.
Notice that the powertap has two internal 8 amp fuses, which should be checked if bus power on either side of the powertap is not available (there are two extra fuses under the cover). These fuses help protect one side of the network when there is a power supply short circuit on the other side of the network. In other words, the whole network doesn't come crashing down with a short circuit between +12VDC and Ground, all the components on the opposite side of the short circuit stay up and running.
 
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