Suppression Ferrites - Raymarine M81120 Installation Manual

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Hydraulic Pump - Installation Guide
For optimum EMC performance, it is recommended that wherever
possible:
• Raymarine equipment and cables connected to it are:
• The equipment is supplied from a separate battery from that used
• Raymarine specified cables are used. Cutting and rejoining these
• If a suppression ferrite is attached to a cable, this ferrite should not

Suppression ferrites

Figure 4 shows typical cable suppression ferrites used with
Raymarine equipment. Always use the ferrites supplied by
Raymarine.
Figure 4: Typical Suppression Ferrites
• At least 3 ft (1 m) 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
7 ft (2 m).
• More than 7 ft (2 m) from the path of a radar beam. A radar
beam can normally be assumed to spread 20 degrees above
and below the radiating element.
for engine start. Voltage drops below 10 V, 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.
cables can compromise EMC performance and must be avoided
unless doing so is detailed in the installation manual.
be removed. If the ferrite needs to be removed during installation
it must be reassembled in the same position.
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D3548-2