Transducer Connections - Simrad ES70 - INSTALLATION REV A Installation Manual

Transducer connections

Transducer types
The echo sounder can be used with a large variety of transducers. The large transducer
connector on the General Purpose Transceiver Unit (GPT) has been prepared to accept
all of them, provided that the appurtenant circuit boards are fitted to the unit. The
following transducer types may be used:
• Single frequency, single beam (high or low power)
• Single frequency, dual beam (wide or narrow)
• Single frequency, split beam
Transducer cables
For the majority of the transducers, the cables are supplied by Simrad. These are
normally physically fastened to the transducer.
Note
The distance between the General Purpose Transceiver and the transducer(s) must be as
short as possible to avoid interference and noise.
All transducer cables must be run in steel conduits. Cable shields must be connected
to the plug housing.
If the distance between the transducer and the transceiver exceeds the length of the cable,
a junction box must be used. The cable between the junction box and the transceiver must
then be supplied by Simrad, and this must be the same type as used on the transducer(s).
Transducer cable splicing
If you need to cut or lengthen the transducer cable, you must splice it correctly. The
cable between the junction box and the transceiver must then be supplied by Simrad,
and this must be the same type as used on the transducer(s). To splice the cable, use a
metal junction box with EMC cable glands and a terminal block. The terminal block
must provide solid fastening of the cable ends as well as sufficient insulation between
the wires. We recommend that the cable screen is connected to the junction box chassis
using the EMC cable glands, but if you do this, the junction box chassis must not be
connected to vessel's ground.
Note
Do not solder the wires together with only electrical tape for insulation. This will result
in electrical noise and reduced operational performance.
Do not connect the cable screen to the vessel's ground.
Transducer connection drawings
• Single beam/normal power transducer on page 64
343522/A
ES70 Cable layout
37