Kahlenberg M-511C User manual

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 1 of 7
INSTALLATION, OPERATION, AND MAINTENANCE
M-511C A.C. WHISTLE CONTROL
1) GENERAL - The function of the Whistle Control is to provide convenient operation of
sound signaling device from a single control panel for At-Will, Restricted Visibility, and
Maneuvering signaling as required. The M-511C also generates the SOLAS General Alarm
Signal, or may be integrated with another alarm system on board which generates this signal.
2) DESCRIPTION - The M-511C is a compact solid state electronic Whistle Control
within a watertight powder coat finished aluminum enclosure. It is operated from a flush
mounted membrane switch keypad with embossed keys.
3) OPERATION -
•CURRENT REQUIREMENT OF M-511C: .25 Amps
•SWITCHING CAPACITY OF M-511C: 1.75 Amps Maximum
•D.C. VOLTAGE REQUIREMENT: 12 TO 24 VOLT D.C.
•A.C. VOLTAGE REQUIREMENT: 100-240 VOLT A.C.
CAUTION: THE M-511C IS FUSE PROTECTED, HOWEVER, BE CERTAIN NOT
TO EXCEED THE 1.75 AMP MAXIMUM SWITCHING CAPACITY. THIS CAN
OCCUR IF MULTIPLE DEVICES ARE CONNECTED SUCH AS ADDITIONAL
LIGHTS OR SOUND PRODUCING DEVICES. A SUITABLE RELAY MUST BE
INSTALLED FOR CONTROLLING THESE DEVICES.
The M-511C A.C. Whistle Control circuit board is powered by 12 or 24 DC voltages with a
current requirement of .25 amps (maximum) and a switching capacity of 1.75 amps (maximum).
This unit also includes a power supply circuit board that accepts 100-240 Volt A.C. 50/60 Hz
power. The A.C. connections are made within the additional galvanized electrical box added to
the back of the unit. Both the A.C. and D.C. inputs of the timer may be connected
simultaneously. In this way, in case of A.C. power loss, the M-511C will continue to operate on
D.C. backup power.
The M-511C is designed to activate a solenoid valve or similar horn-activating device operating
on the same voltage as the M-511C. Activation of the horn can be accomplished several ways
depending upon the type of signal desired. For “At-Will” operations use the “Manual/At-Will”
button, this button will signal the device instantly at all times regardless of the mode of
operation. There are five (5) predetermined Restricted Visibility codes within the M-511C and
they are indicated on the associated button of the keypad. For a definition of these codes and
their uses, refer to the reference sheet included with these instructions. Pressing the “Auto
On/Off” button activates the five code buttons. Upon activation of the Automatic mode, the red
LED light of the activated code will light and signaling of the device for that code will
commence after a 10 second delay. This designed delay is to prevent commencement of the

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 2 of 7
activated code prior to selection of a new code or proper preparation at listening posts. A new
code can be selected at any time during automatic operation and will commence after the 10
second delay. Termination of the Automatic Mode can be accomplished by either depressing the
“Auto On/Off” button, activating any of the Maneuvering Signal codes, activating the “At-Will”
button (the latter two will also cause instantaneous signaling of the device), or activating the
“General Alarm” button.
The M-511C has the ability to change the cycle times between restricted visibility signaling. The
default setting is 120 seconds between blasts, which is also regulation. When initially powered
up the 120 second LED on the “Auto On/Off” will be lit, signifying the 2-minute interval. The
other two intervals are 90 seconds, and 60 seconds. To change the signaling interval depress and
hold the “Auto On/Off” button for 5 seconds then release and the next LED will be lit, continue
this procedure until the desired interval is attained.
For quick easy signaling of required maneuvering codes the M-511C includes four (4) preset
codes with a descriptive reference included on the keypad. For a complete explanation of these
codes please refer to the attached reference sheet. When a maneuvering code button is pressed,
the horn will instantaneously signal the code and terminate the Auto mode (if on).
The M-511C is designed to be used as a single unit or in conjunction with other M-511C units,
and with multiple remote “At-Will” buttons, such as the Kahlenberg M-131A, M-126, or any
customer supplied two contact button. Refer to the wiring diagram included with these
instruction sheets for your particular application.
The M-511C is also equipped with a General Alarm code which is activated by depressing and
holding the “General Alarm” button for 3 seconds. This function will stop all other functions on
the M-511C and can only be stopped by depressing the “Auto On/Off” button. When the General
Alarm is activated all three LED’s on the “Auto On/Off” button will be illuminated at the same
time.
**NOTE: The “Horn 1, Horn 2 Select” button is inoperable on the M-511C. This switch
functions only when this unit is supplied with the Kahlenberg KB-30 Electronic Horn/Hailer
unit.
4) INSTALLATION -
WARNING: HIGH VOLTAGE MAY BE PRESENT INSIDE ENCLOSURES. BE SURE
TO SHUT OFF POWER, TAG OUT, AND VERIFY NO VOLTAGE IS PRESENT
BEFORE INSTALLING OR ATTEMPTING TO SERVICE THIS UNIT. FAILURE TO
FOLLOW THIS WARNING COULD RESULT IN SERIOUS INJURY OR DEATH.
The M-511C mounts easily into a console and is secured by fastening the bezel to the console

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 3 of 7
with four (4) #8 x 1-1/4" self clinching studs already attached. An opening of 4-3/8" wide by 2-
7/8" high should be made in the console where the unit is to be placed. See the enclosed
template drawing 2-5437 for details. The M-511C is shipped with 1 loose gasket for
installations exposed to the elements. The gasket has a removable adhesive backing and is used
to provide a seal between the Bezel and Console. Simply remove the adhesive backing and
secure in place. An additional bead of RTV silicone sealant may be applied around the
perimeter of the Bezel for additional weather protection. Refer to the enclosed wiring diagram
3-6238 and 3-6399 for typical wiring diagrams for the M-511C. The drawings reference the
previous version of the timer (M-511A), but remain accurate in all respects for the “C” revision
of this unit. For custom installations not matching these wiring diagrams, please refer to custom
diagrams supplied or contact Kahlenberg for assistance.
5) CARE AND MAINTENANCE - The M-511C Whistle Control is designed to provide
many years of maintenance free operation and there are no spare parts we suggest you keep on
hand. However if any parts listed on the attached Parts List drawings are required for any
reason, please refer to the associated part number when ordering. If the M-511C should fail to
operate properly please contact Kahlenberg Brothers Company for recommended action or return
to Kahlenberg for prompt analysis and repair.
When cleaning the membrane switch panel, we recommend the use of Windex (or equivalent) or
a mild soap/water solution applied with a soft cotton cloth.
6) DRAWING REFERENCES
Outline Dimensions: #3-6429
Parts List: #3-6431
Wiring Diagrams:
A.C. Input Voltage, D.C. Output, for use with D.C. solenoid valves: #3-6399
A.C. Input Voltage, A.C. output: #3-6238
**For custom installations other than those shown in the above wiring diagrams see
custom wiring diagrams provided by Kahlenberg or contact Kahlenberg Bros. Company
with specific requirements.

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 4 of 7
RESTRICTED VISIBILITY CODES
RULE 35
INTERNATIONAL & INLAND
IN OR NEAR AN AREA OF RESTRICTED VISIBILITY, WHETHER BY DAY OR NIGHT,
THE SIGNALS PRESCRIBED IN THIS RULE ARE AS FOLLOWS:
One Prolonged Blast (Every 2 minutes)
Making Way through the water
Two Prolonged Blasts (Every 2 minutes)
Underway but stopped and making no way through the water
One Prolonged Blast and Two Short Blasts (Every 2 minutes)
Vessel not under command
Vessel restricted in her ability to manuever
Vessel constrained by her draft
Sailing Vessel
Vessel engaged in fishing
Vessel engaged in towing or pushing another vessel
One Prolonged Blast and Three Short Blasts (Every 2 minutes)
A Vessel towed or if more than one Vessel is towed the last Vessel
of the tow, if manned. When practicable, this signal shall be
made immediately after the signal made by the towing Vessel.
One Short Blast, One Prolonged Blast, One Short Blast (Every
Minute) Vessel at Anchor
*Note: The above is intended as a quick reference guide only and in no way is intended to
be a replacement for the complete Rule 35 as included in the 72' COLREGS

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 5 of 7
MANEUVERING CODES
RULE 34
INTERNATIONAL - RULE (A)
WHEN VESSELS ARE IN SIGHT OF ONE ANOTHER, A POWER-DRIVEN VESSEL
UNDERWAY, WHEN MANEUVERING AS AUTHORIZED OR REQUIRED BY THESE
RULES, SHALL INDICATE THAT MANEUVER BY THE FOLLOWING SIGNALS ON
HER WHISTLE:
One Short Blast
“I am altering my course to Starboard”
Two Short Blasts
“I am altering my course to Port”
Three Short Blasts
“I am operating Astern Propulsion”
Five Short Blasts
“Danger”
Failure to understand intentions or actions, or in doubt
*Note: The above is intended as a quick reference guide only and in no way is intended to
be a replacement for the complete Rule 34 as included in the 72' COLREGS
ALT STBD
ALT PORT
ASTERN
DANGER

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 6 of 7
INLAND - RULE (A)
WHEN POWER-DRIVEN VESSELS ARE IN SIGHT OF ONE ANOTHER AND MEETING
OR CROSSING AT A DISTANCE WITHIN HALF A MILE OF EACH OTHER, EACH
VESSEL UNDERWAY, WHEN MANEUVERING AS AUTHORIZED OR REQUIRED BY
THESE RULES:
One Short Blast
“I intend to leave you on my Port side”
In Agreement
Two Short Blasts
“I intend to leave you on my Starboard side”
In Agreement
Three Short Blasts
“I am operating Astern Propulsion”
In Agreement
Five Short Blasts
“Danger”
Doubt Safety of Proposed Maneuver
*Note: The above is intended as a quick reference guide only and in no way is intended to
be a replacement for the complete Rule 34 as included in the 72' COLREGS
ALT STBD
ALT PORT
ASTERN
DANGER

Kahlenberg Instruction Sheet 323 Rev. 6/29/2011, Page 7 of 7
INLAND - RULE (C)
WHEN IN SIGHT OF ONE ANOTHER (I) A POWER DRIVEN VESSEL INTENDING TO
OVERTAKE ANOTHER POWER DRIVEN VESSEL SHALL INDICATE HER INTENTION
BY THE FOLLOWING SIGNALS ON HER WHISTLE:
One Short Blast
“I intend to overtake you on your Starboard side”
In Agreement
Two Short Blasts
“I intend to overtake you on your Port side”
In Agreement
Five Short Blasts
“Danger”
Failure to understand intentions or actions, or in doubt
GENERAL EMERGENCY ALARM CODE:
Seven Short Blasts followed by 1 long blast (repeats every 10 seconds)
IMO SOLAS GENERAL EMERGENCY ALARM SIGNAL
*Note: The above is intended as a quick reference guide only and in no way is intended to
be a replacement for the complete Rule 34 as included in the 72' COLREGS
ALT STBD
ALT PORT
DANGER

Wiring Conversion from M-511 to M-511A
D.C. Versions
M-511 M-511A
(+) in Terminal 5
(-) in Terminal 3
S Terminal2
A Terminal3
R Terminal2
A.C Version
M-511 M-511A
Black Black
White Brown
Red Orange
Green (Ground)
Red(Disregard)

AT THIS JUMPER THERE ARE 3 PINS. JUMPER IS PLACED OVER TWO PINS ON THE RIGHT
AS SHIPPED FROM FACTORY.