6-1-16 Section 6: Installation
ST290 Instrument System Owner’s Handbook
transducer Pods connect to SeaTALK
2
, whereas the analog instruments
and keypads connect to SeaTalk.
A very basic system could comprise the DPU, one instrument, one
transducer and one Pod, but in practical terms, a typical ST290 system
will comprise a number of digital and analog instruments, several
transducers, Pods and keypads.
Cables
Cables for both SeaTalk buses are available both in made-up form with
fitted connectors, and unterminated on a drum. Spade connectors and
junction boxes are provided to terminate cables as necessary.
Power supply
The power supply installation information in this handbook is valid for a
typical ST290 system with a total LEN of up to 100 (see SeaTalk
2
requirements on page 6-1-14). Larger systems need additional power
supplies.Ifthe systemyou are intendingtoinstallwillhave atotalLEN of
more than 100, please contact the Raymarine Technical Support
Department,or yourlocal Raymarine Dealer,for advice on power supply
connection.
An ST290 system requires a 12 V dc supply, connected in one of the
following ways:
• With the supply (normally a battery) connected to the DPU.
• From a Raymarine Course Computer, via SeaTalk.
Note: If a battery is used as a power source, it is recommended that in or-
der to avoid sudden voltage drops, the battery used for engine starting is
NOT used to power ST290.
Refer to Section 6, Chapter 2 for power connection details.
Protection
The power supply must be protected with a 5 A fuse or circuit breaker.
81183_2 S6.book Page 16 Wednesday, May 7, 2003 11:27 AM
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