6
I/O Drive - Installation Guide
The guidelines given here describe the conditions for optimum EMC
performance, but it is recognized 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 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.
•
The equipment is supplied from a separate battery from that used
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.
•
Raymarine specified cables are used. Cutting and rejoining these
cables can compromise EMC performance and must be avoided
unless doing so is detailed in the installation manual.
•
If a suppression ferrite is attached to a cable, this ferrite should not
be removed. If the ferrite needs to be removed during installation
it must be reassembled in the same position.
Suppression ferrites
Figure 3 shows typical cable suppression ferrites used with
Raymarine equipment. Always use the ferrites supplied by
Raymarine.
Connections to other equipment
If your Raymarine equipment is to be connected to other equipment
using a cable not supplied by Raymarine, a suppression ferrite MUST
always be attached to the cable near to the Raymarine unit.
