Installation; Introduction; Emc Installation Guidelines - Raymarine DSM400 Installation Manual

Chapter 1: Installation

1.1 Introduction

This chapter deals with the installation of the DSM400
Digital Sounder Module and covers the following:
• EMC installation
guidelines
• Planning the installation
• What's in the box
• Installing the unit
• Cable runs
• Extending cables
Connections to the unit are dealt with in "System and
transducer connections" on page 17.

1.2 EMC installation guidelines

All Raymarine equipment and accessories are designed
to the best industry standards for use in the recreational
marine environment.

Installation

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Their design and manufacture conforms to the
appropriate Electromagnetic Compatibility (EMC)
standards, but correct installation is required to ensure
that performance is not compromised. Although every
- refer to page 9
effort has been taken to ensure that they will perform
under all conditions. It is important to understand what
- refer to factors could affect the operation of the equipment.
page 12
The guidelines given here describe the conditions for
optimum EMC performance, but it is recognized that it
- refer to
may not be possible to meet all of these conditions in all
page 13
situations. To ensure the best possible conditions for
EMC performance within the constraints imposed by any
- refer to
location, always ensure the maximum separation
page 13
possible between different items of electrical equipment.
- refer to
• Place equipment at least 5ft (1.5 m) from any
page 14
equipment transmitting or cables carrying radio
signals, e.g. VHF radios, cables and antennas. In
- refer to
the case of SSB radios, the distance should be
page 15
increased to 7ft (2 m).
• Place equipment more than 7ft (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
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