User manual

Page 10© 2013 Active Research Limited
Connecting Power to the NBF-3
• Refer to “Warning 3: Installation Code of Practice” on page 8.
• The NBF-3 requires a power source providing between 10 and 35
Volts DC.
• Connect the positive supply wire to the ‘PWR +VE’ screw terminal
of the NBF-3.
• Connect the negative / ground supply wire to the ‘PWR GND’
screw terminal of the NBF-3.
• The NBF-3 should only be used with standard negative ground DC
systems.
• The input supply connection has continuous reverse polarity and
ESD protection.
Note: This protection is only on the power input, for details of the
power output refer to “Powering the Talker from the NBF-3
Listener Port” on page 11.
• Once all connections have been made, turn on the supply. For
details on the power indicator, refer to “NBF-3 Power LED (Blue)”
on page 14.
Figure 3 - Power Connection Diagram
NMEA 0183 Listener and Talker Designations
The NMEA have updated the NMEA 0183 specication to ensure a consistent naming convention is used for labelling
ports. The designation follows the same rules as used for Rx and Tx labelling but uses Talker and Listener instead.
The input / receiving (Rx) port will be labelled as a ‘Listener’ port.
The output / transmitting (Tx) port will be labelled as a ‘Talker’ port.
When a port is labelled ‘Listener’ it is an input and when it is labelled ‘Talker’ it is an output.
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Fuse Box
Battery