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M-485B Horn Signal Controller Instructions 

 

Rev. 4/12/2022 

www.kahlenberg.com

 

 

Customer Support: 1-920-793-4507 

 

2.)

 

Move the switch to the center “OFF” position.   The LED light on the switch should turn 

off.  The M-485B is now off and horn sounding should stop. 

3.)

 

Move the switch to the bottom “Stopped” position.  The corresponding amber LED light 

on the switch should illuminate, and the M-485B should immediately sound the horn for 

2 long blasts (appx. 4 seconds each), and repeat every two minutes.   

4.)

 

While the M-485B is operating either “Stopped” or “Underway” codes, press the “At-Will” 

horn button on the vessel.  The horn should sound.   If the “At-Will” button is the 

Kahlenberg M-130 Horn Button, the horn should sound, AND the M-485B Controller 

should stop the automated signal pattern currently in operation.   The LEDs on the 

switch should also begin flashing.   The flashing indicates that the M-485A automated 

signal pattern has been interrupted.   To reset the M-485A, move the rocker switch to 

the center “Off” position.   If the “At-Will” button on the vessel is a standard single pole 

switch, the horn should sound when it is depressed, but the automated signal code will 

continue to sound the horn uninterrupted on the M-485B. 

 

MAINTENANCE 

The M-485B is a solid state unit and is not user serviceable.  Contact Kahlenberg Industries for 

any replacement parts that may be needed.   Please have model number and serial number of 

the unit available when contacting us for assistance.  

STORAGE 

If storing the M-485B for an extended period of time, store indoors at temperatures above 32 

deg. F./0 deg. C., and poly bag and package package the items with silica desiccant packets to 

protect from dust and excessive moisture. 

Reference Documents: 

Outline Dimensions, M-485B Horn Signal Controller 

Drawing 3-7575 

Parts List, M-485B Horn Signal Controller 

Drawing 3-7576 

Wiring Diagram, Installation with Air Horn and single pole  

“At-Will” Button 

Drawing 3-7584 

Wiring Diagram, Installation with Air Horn and M-130 double pole 

“At Will” Push Button 

Drawing 3-7577 

Wiring Diagram, Installation with Electric Horn and single pole 

“At Will” Push Button 

Drawing 3-7597 

Wiring Diagram, Installation with Electric Horn and M-130 double 

pole “At Will” Push Button 

Drawing 3-7582 

 

 

TROUBLESHOOTING 

Summary of Contents for M-485B

Page 1: ...TI 37575 DC ABC M 485B SIGNAL CONTROLLER FOG SIGNAL TIMER AND WHISTLE CONTROL 12 OR 24 VOLT D C WITH ILLUMINATED M 129 TWO POSITION PANEL ROCKER SWITCH INCLUDES FOG SIGNAL CODES RULE 35 FOR UNDERWAY A...

Page 2: ...ting 9 Drawings 10 15 WARNING This instruction manual contains important instructions for operating this product Read this manual thoroughly before operating the product Failure to properly follow all...

Page 3: ...ate control for automating sound signals in conditions of restricted visibility fog signals as prescribed by International Navigation Rules IMO COLREGS Part D Rule 35 The M 485B will output signals fo...

Page 4: ...rescribed in paragraphs a or b of this Rule sound at intervals of not more than 2 minutes three blasts in succession namely one prolonged followed by two short blasts PACKAGE CONTENTS The M 485B Horn...

Page 5: ...r Support 1 920 793 4507 INSTALLATION Initial Setup Internal to the M 485A there is a jumper located at position J2 on the circuit board as shown below The jumper is in this position as shipped from t...

Page 6: ...0 793 4507 To change the M 485B output to the restricted visibility codes for SAIL vessels gently pull the jumper up off the pins and move it to disconnect the jumper circuit as shown below NOTE When...

Page 7: ...75 9 52 mm thickness 1 The hole in the panel should be cut per the switch cutout depicted on drawing 3 7575 NOTE If the switch is to be used without the P548 04 mounting bezel the hole will need to be...

Page 8: ...location on J1 and install it in terminal J8 3rd terminal location right next to the existing red horn cable wire 4 Make connections according to wiring diagram 3 7597 or wiring diagram 3 7582 if the...

Page 9: ...on on the vessel is a standard single pole switch the horn should sound when it is depressed but the automated signal code will continue to sound the horn uninterrupted on the M 485B MAINTENANCE The M...

Page 10: ...B is sending current to solenoid valve but air horn is not sounding Solenoid valve body is installed backwards in air line Verify solenoid valve installation is correct An arrow on the valve body indi...

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