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SYSTEM CONFIGURATION
TRANSDUCER
DISTRIBUTION
BOX
FE-702
DISPLAY UNIT
FE-701
JUNCTION BOX
JIS F8821-1
MATCHING BOX MB-502 (for 50B-6B)
MB-504 (for 200B-8B)
JB JB
IEC 61162-1
EIA-232C
IEC 61162-1 Navigation Device
Navigation Device
Personal Computer
IEC 61162-1
JB
TRANSDUCER SWITCH BOX
EX-8
DIGITAL DEPTH INDICATOR
FE-720
CONTACT CLOSURE Alarm Unit
: Standard Supply
Ship’s mains
100-115 VAC/200-230 VAC
or
24 VDC
: Optional Supply
TERMINAL BOX
DS-802
: Local Supply
FE-700 system configuration
PRINCIPLE OF OPERATION
The FE-700 uses ultrasonic pulses to detect the seabed and other underw ater objects. The display unit
contains all basic electric circ uits and logic processor. Electrical pulses are converted into acoustical
energy in the transducer fitted on the ship’s hull. The processor measur es the time of pulses travelling
between the seabed and transducer a nd displays the water depths in the g raphical form or other form s.
The transducers have a specifi c beam width with respect to their wor king frequency, 50 kHz or 200 kHz.
The high frequency has a narrow b eamwidth and is immune to aeration when the ship is going astern or in
rough weather. The low frequency has a wide b eamwidth and more powerful sounding capability.