Autohelm - Equipment instruments mounted in vulnerable areas such
Autohelm - Equipment instruments mounted in vulnerable areas such
Autohelm - Equipment instruments mounted in vulnerable areas such
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1 .6 R<strong>in</strong>g Connection<br />
Installations with a large number of <strong><strong>in</strong>struments</strong> on a SeaTalk bus may require<br />
a second r<strong>in</strong>g-ma<strong>in</strong> connection to the power supply breaker to prevent<br />
excessive voltage drops. Whether a second r<strong>in</strong>gma<strong>in</strong> is required can be<br />
determ<strong>in</strong>edfrom the follow<strong>in</strong>g :<br />
Cable run upto 10m (33ft)<br />
S<strong>in</strong>gle connection :<br />
Second connection :<br />
Cable run upto 20m (66ft)<br />
S<strong>in</strong>gle connection :<br />
Second connection :<br />
13 <strong><strong>in</strong>struments</strong> maximum<br />
26 <strong><strong>in</strong>struments</strong> maximum<br />
7 <strong><strong>in</strong>struments</strong> maximum<br />
13 <strong><strong>in</strong>struments</strong> maximum<br />
The second r<strong>in</strong>g-ma<strong>in</strong> should be connected to the spare lead on the last<br />
<strong>in</strong>strument <strong>in</strong> the cha<strong>in</strong> and directed back to the circuit breaker.<br />
1 .7 Connection to SeaTalk Compatible Autopilots<br />
If the <strong>in</strong>stallation <strong>in</strong>cludes a SeaTalk compatible Autopilotthe ST50 Plus<br />
<strong><strong>in</strong>struments</strong> maybe connected to the SeaTalk bus at any po<strong>in</strong>t . No <strong>in</strong>dependent<br />
connection to the 12V power supply is necessary as the <strong><strong>in</strong>struments</strong><br />
receive power from the Autopilot coursecomputer.
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