Theory Of Operation; Hardware Description; Figure 1 - Key Numbering; Figure 2 - Hardware Description Front View - Maretron CKM Series User Manual

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Theory of Operation

Key position will be reported via the NMEA2000® Standard 127501 "Binary Status Report" CAN
message. Each button is considered a separate binary (on or off) switch and will be numbered as
follows:

Figure 1 - Key Numbering

There is a total of twelve blue LEDs, each configurable via CAN message to act as a function
indicator. The LEDs are located above the top row of keys and below the bottom row of keys. The
icons on each key are lit by an LED backlight located behind the icon. LEDs can be tied to a
channel of any device on the CAN network that reports the NMEA2000® standard 127501 "Binary
Status Report" message. When the associated channel reports it is in the "on" state, the LED will
be turned on and set to the function indicator brightness level. When the associated channel
reports it is in the "off" state, the LED would be extinguished.

Hardware Description

Figure 2 - Hardware Description Front View

CKM12 User's Manual Rev.1.1
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