VAL Avionics NAV 2000 Guia de Instalação descarregar pdf (Página 274)

Accessory Installation and Configuration

15-6 SkyView System Installation Guide - Revision R

Wire Color

Notes

Red

Connected through a pilot-accessible switch to

10 to 15 volt DC supply.

Must handle up to 10 amps.

Black

Must have a constant connection to ground.

This is required for the warning light to

operate when controller is powered off or not

functioning. Line must handle up to 10 amps.

White

Connected to a light bulb (or resistor & LED)

tied to switched ship’s power. This line is

grounded when the heater controller is

powered off or not functioning. Connection

can handle no more than 1 amp. Current

depends on light source connected.

Table 50–Controller Power Wiring Details

Heater Status Connection

The probe heater functions properly whether or not you make this connection. It is

simply a status output for your convenience.

The white heater status wire is grounded when the probe heater is turned off or not

functioning properly. This wire should be connected to a light on the panel, whose other

terminal is connected to switched aircraft power. When the heater is on and functioning

properly, the white heater status line is open, leaving the indicator light turned off. When there

is no power to the heater controller–or it is not functioning properly–the white line is

grounded, turning the indicator light on. This parallels annunciator behavior in FAA certificated

aircraft.

Aircraft Spruce P/N 17-410 is an example of a light that will work for this application. An LED

and resistor in series will also suffice. If you use an LED as the indicator, you must choose a

resistor that delivers the appropriate current to the LED, and can accommodate the power

required for its current and voltage drop. Also note that the power and ground connections on

LEDs are not reversible.

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VAL Avionics NAV 2000 Guia de Instalação Página 274