NorthStar Navigation installation manual Initial checkout, Turning the 491 on, For the 961/962

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SECTION THREE — Installing the 491

1/2” Max.

#1 Speed Signal

 

 

#2 Speed +V

 

#4 Thermistor

1

2

#3 Speed Gnd

 

#5 Depth 50 kHz +

 

3

#7 Thermistor

 

4 5

6 7

 

#8 Depth 200 kHz +

8

9

#6 Depth 50 kHz –

Wire stripping detail

#10 Depth 200 kHz –

 

10

#9 Depth Shields

 

 

 

 

3/16”

FIGURE 10: Wiring of B260 transducer cable (solder-cup side of connector

shown)

1/2” Max.

#1 Speed Signal

 

 

#2 Speed +V

 

#4 Thermistor

1

2

#3 Speed Gnd

 

#5 Depth 50 kHz +

 

3

#7 Thermistor

 

4 5

6 7

 

#8 Depth 200 kHz +

8

9

#6 Depth 50 kHz –

Wire stripping detail

#10 Depth 200 kHz –

 

10

#9 Depth Shields

 

 

 

 

3/16”

FIGURE 11: Wiring of B44/B744 and P66 transducer cable (solder-cup side of

connector shown)

Initial checkout

Turning the 491 on

Plug the transducer cable into the TRANSDUCER connector of the 491.

If your transducer doesn’t support speed, you can connect a separate speed sensor, such as the Airmar ST650, to pins 1, 2 and 3, as shown in the table.

This section assumes that the 491, Northstar navigator, and transducer are now all properly connected. Turning on the navigator automatically turns on the 491 (be sure your vessel is in the water). To turn the naviga- tor on, briefly press its PWR key.

For the 961/962

To use the 491 echo sounder, the 961/962 must be running software ver- sion 3.0 or higher. If not, contact the factory to obtain the upgrade CD. To install the upgrade, follow the steps on the back of the jewel box.

You must set the 961/962’s Port 3 to “490”:

1.Press STAR to display the SERVICE MENU screen.

2.Press PORT SETUP.

3.Press PORT 3.

4.Set the FORMAT option to 490.

The STATUS indicator light on the 491 glows steady green when the 491’s power is on.

491 INSTALLATION MANUAL Revision A

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Contents Echo Sounder Installation Manual Page Table of Contents Page Who should read this manual Scope of this manual Section ONE IntroductionWelcome to the Northstar Installation considerations Safety considerations Section TWO Installing the transducerAirmar transducer elements Northstar-recommended transducersDo not mount the transducer Choosing a mounting locationHull thickness limits LWL Installing the transducerLWL Using anti-fouling paintDetail Cleaning a transducerPage Section Three Installing Section Three Installing Installation Manual Revision a Echo sounder system components with the Northstar 961/962 System components190 dia 360 dia MountingConnecting the 491 to the 961/962 WiringInterface cable connection from 961/962 to Cable connection between the 961/962Connecting the 491 to the 957/958 491-to-transducer connector pin wiring Connecting the 491 to a transducerFor the 961/962 Initial checkoutTurning the 491 on For the 957/958/6000i Installation test checklistSetting up the echo sounder Turning the 491 offStatus LED Section Four Troubleshooting and servicing961/962 echo sounder system troubleshooting 957/958/6000i echo sounder system troubleshooting Contacting Northstar Getting technical supportHearing from you Ordering replacement parts ServicingReturning a 491 for service 491 technical specifications Appendix a Technical specificationsON/OFF Cavitation Deadrise Echo sounder Fairing block Transducer GlossaryGlossary Installation Manual Revision a Index 491 Index Index Installation Manual Revision a