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Raymarine EMC Guidelines
EMC Installation & Service Guidelines
IMPORTANT NOTE
All Raymarine equipment and accessories are designed to the best industry standards for
use in the leisure marine environment.
When powered up, all electrical equipment produces electromagnetic fields. These can
cause adjacent pieces of electrical equipment to interact with one another, with a
consequent adverse effect on operation. In order to minimise these effects and enable you
to get the best possible performance from your Raymarine equipment, these guidelines are
provided to enable you to ensure minimum interaction between different items of
equipment, i.e. ensure optimum Electromagnetic Compatibility (EMC).
The design and manufacture of Raymarine equipment and accessories conform to the
appropriate EMC standards, but correct installation is required to ensure that performance
is not compromised. Although every effort has been taken to ensure that they will perform
under all conditions, it is important to understand what factors could affect the operation of
the product. Please keep this document for future reference.
Safety
Some products generate high voltages, so never handle the cables/connectors when power
is being supplied to the equipment.
Installation
These guidelines describe the conditions for optimum EMC performance, but it is
recognised that it may not be possible to meet all of these conditions in all situations. To
ensure the best possible conditions for EMC performance within the constraints imposed
by any location, always ensure the maximum separation possible between different items
of electrical equipment.
For optimum EMC performance, it is recommended that wherever possible:
• Raymarine equipment and cables connected to it are:
• At least 1 m (3 ft) from any equipment transmitting or cables carrying radio signals
e.g. VHF radios, cables and antennas. In the case of SSB radios, the distance
should be increased to 2 m (7 ft).
• More than 2 m (7 ft) from the path of a radar beam. A radar beam can normally be
assumed to spread 20 degrees above and below the radiating element.
• The equipment is supplied from a separate battery from that used for engine start.
Voltage drops below 10 V in the power supply to our products, and starter motor
transients, can cause the equipment to reset. This will not damage the equipment, but
may cause the loss of some information and may change the operating mode.