— 14 —
You can use supplied button or any momentary push-button you like that matches your boat’s interior.
Waterproof IP67 buttons of this type with integrated LED of various colours are widely available from
well-known international suppliers like DigiKey Electronics (
), Mouser Electronics
(
) and others. For example, Mouser part number 123-82-4151.1153 is an IP67 stainless
steel 16mm momentary push-button with white ring illumination (LED 12V, AC/DC).
Device provides 3.3 Volts to the external LED wire (YELLOW) and has a 200 Ohm built-in current-limiting
resistor (you can connect the LED directly to wires). Buttons with LEDs rated for 12 Volt will be brighter
than buttons rated for 24 Volt (actually they differ by current-limiting resistor inside). Buttons with LED
rated for 5 Volt and 3.3 Volt are recomemnded, also widely available.
YELLOW wire of the Device must be connected to LED’s anode (+), the BLUE wire must be connected to
the button, CLEAR wire must be shared between the LED’s cathode (-) and the second button terminal.
Terminals of the button supplied with the Device are shown in Figure 4. It is mandatory to crimp
contacts, soldering is optional. Soldering joints must be protected from the environment with paint or
lacquer.
3. Connection of the sound speaker
Device has a built-in 10 Watt audio amplifier and can output current up to 1 Ampere. The best performance
will be achieved with 4 Ohm speakers, the 8 Ohm speaker will sound a little quieter. Piezoelectric sound
emitters can also be used, but they may have adequate performance with tone signals only.
Device's RED wire should be connected to the "+" terminal of the speaker, and BLACK wire should be
connected to the "-" terminal of the speaker (see Figure 3). Sound volume can be adjusted in the settings.
(see Sections IV and V).
Note that Device audio amplifier power rails are directly connected to NMEA 2000 power
rails — Device audio output is not galvanically isolated from NMEA 2000 power. Therefore,
do not connect any other equipment to Device audio output and make sure that speaker cable
is routed well in a way that prevents its accidental short (between wires themselves or to the
vessel's common ground).
For maximum possible NMEA 2000 power short protection connect device to backbone via "NMEA
2000 power isolator" tee (e.g. Garmin part number 010-11580-00) and power the device from a
separate NMEA 2000 power cable with dedicated fuse.
