Installation manual

Simrad 50-7

STEEL CONDUIT

It is strongly recommended to lay a steel conduit from the

transducer’s cable gland to the echo sounder transceiver, a nd to

pull the transducer cable through this conduit. There are two

reasons for this.

• First, it will make it easier a t a later stage to replace the

transducer.

• Second, noise and interference from other electrical equipment

is greatly reduced.

With a steel conduit t he installation will satisfy the EU

regulations for EMC interference. Without a steel conduit, there

is a risk of reduced echo sounder performance.

The steel conduit must be unbroken and watertight from the

transducer to above the water line. From there, the cable can

be pulled further, or a junction box can be installed to facilitate

further connections. Note that t he steel conduit must act as

a continuous electrical screen all the way. To ensure proper

shielding, the conduit must be electrically connected to the echo

sounder transceiver chassis.

Steel conduit dimensions:

• minimum 35 mm inner diameter

• minimum 6 mm wall thickness (4.5 mm if galvanised)

If two or more transducers are installed close to each other i t is

possible to pull their cables in the same steel conduit, provided

the conduit diameter is increased accordingly. However, for easy

replacement it is recommended that each transducer has its own

steel conduit.

305270/A