Furuno FE-700 manual System Configuration, Display Unit

SYSTEM CONFIGURATION

DISTRIBUTION BOX

FE-702

DISPLAY UNIT

FE-701

TERMINAL BOX

DS-802

IEC 61162-1

IEC 61162-1

IEC 61162-1

EIA-232C

CONTACT CLOSURE

TRANSDUCER SWITCH BOX

EX-8

DIGITAL DEPTH INDICATOR

FE-720

Navigation Device

Navigation Device

Personal Computer

Alarm Unit

Ship’s mains

100-115 VAC/200-230 VAC or

24 VDC

JB	JB	JB	JUNCTION BOX
			JIS F8821-1

MATCHING BOX MB-502 (for 50B-6B)

MB-504 (for 200B-8B)

TRANSDUCER

: Standard Supply

: Optional Supply

: Local Supply

FE-700 system configuration

PRINCIPLE OF OPERATION

The FE-700 uses ultrasonic pulses to detect the seabed and other underwater objects. The display unit contains all basic electric circuits and logic processor. Electrical pulses are converted into acoustical energy in the transducer fitted on the ship’s hull. The processor measures the time of pulses travelling between the seabed and transducer and displays the water depths in the graphical form or other forms.

The transducers have a specific beam width with respect to their working frequency, 50 kHz or 200 kHz. The high frequency has a narrow beamwidth and is immune to aeration when the ship is going astern or in rough weather. The low frequency has a wide beamwidth and more powerful sounding capability.

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