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FS 20/25 Operators Manual 901-10037001/1.1
FS 20/25 Installation, System Set-Up and Test Page 4.7
Kongsberg Simrad Mesotech Ltd.
Port Coquitlam, BC - Canada
4.2.7 Connecting the TTM Module
The TTM interface module comes with the long line power supply incorporated in
one unit, thus making the installation easier.
The Front Panel comes with an ON/Off switch, trawl DC output voltage meter and
amperage meter, and a four position trawl voltage rotary selection switch is
provided. The possible selections are; “OFF”, “TEST”, “FS20”, “FS25”.
The Rear Panel of the TTM module comes with the AC 110/220 power input, master
ON/OFF switch and fuse located in the AC power entry module, an RS232 serial
port “A” and “B”, an RS485 serial port “A” and “B” and the 3
rd
wire trawl cable
connector. Note: To connect the TEST cable, just disconnect your 3
rd
wire trawl
cable.
4.2.8 Selecting AC Supply Voltage
You must select and position the line voltage card located inside the power entry
module to the desired position.
To change the input line voltage, use a small blade screwdriver and pop the cover.
Pull the voltage selector card straight out from the housing, and place the indicator
pin to the selected desired voltage. Reinsert the card, reinstall the cover and verify
that the indicator shows the desired voltage. You must insure that the proper fuse
rating is installed, 2 Amp for 220Vac and 4 Amp for 110Vac. Spare fuses are
supplied with the TTM module
4.2.9 Selecting the Trawl Output Voltage
You must select the proper trawl voltage in accordance with the under water trawl
unit system you are using, FS20 or FS20/25 trawl.
A- In the “OFF” position, no voltage is applied to the trawl cable.
B- In the “TEST” position, 60 VDC will be provided to the trawl cable. Note: In
the “TEST” position you must connect the test cable supplied with the system
in lieu of the trawl cable at the rear of the TTM module.
C- In the “FS20” position, 120 VDC will be provided to the trawl cable. You
select the FS 20 when you have an FS900 Housing under water unit
connected to the trawl cable, utilizing an FS3300, TS10, TS15 or TS15S
sonar head and a sensor module.
44


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