LUN 1795.2

Attitude indicator (horizon) EHSI

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An attitude indicator is an instrument used in an aircraft to inform the pilot of the orientation of the aircraft relative to Earth’s horizon. LUN 1795.2 is a variant of LUN 1795, which can be used as an artificial horizon display.


Technical parameters

RS 232: 1× service port

ARINC 429 RX: 4× input port

GPIO: 4× digital input or 2× relay output

AN IN: 1× analog input

ARINC 407/Russian: 3× synchro/Resolver

Inputs: 1× vertical and lateral deviation

RS 232/422 (optional): 2× input port

ARINC 429 TX (optional): 2× output port

MIL 1553 (optional): 2× bus

DIN (optional): 2× digital input

General Parameters

Voltage (nom.): 27,5 V DC

Voltage (operative): 11…30 V DC

Current (nom.): 0,3 A

Power Consumption: 10,25 W

Operating temperature: -55 – 70 °C

Storage temperature: -55 – 85 °C

Humidity: max. 95 %

Connectors: Circular 37 pin

Dimensions: 132 × 123 × 123 mm

Weight: 1300 g ± 10 %

Display Parameters

Display area: 89,28 (H) × 89,28 (V)

Number of dots: 640 × 3 (H) × 640 (V)

Number of color: 262k (6bit/color)

Luminance: 1200 cd/m2

Viewing angle: >-80~80° (H), -70~80° (V)

Back-light unit: Edge-light, LED

It indicates pitch (fore and aft tilt) and bank (side to side tilt) and is a primary instrument for flight in instrument meteorological conditions. As an example, it also works with platform AN-12 replacing NPP 1485MK.

lun 1795 2 block diagram

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