LUN 1795.2 - Altitude Indicator (Horizon) EHSI

An altitude indicator is an instrument used in an aircraft to inform the pilot of the orientation of the aircraft relative to Earth's horizon. 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 na example, it also works with platform AN-12 replacing NPP 1485MK.

 

 

 

Technical specification

Peripheries
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
Dimensions 132 × 123 × 123 mm
Weight 1300 g ± 10 %
Voltage (nom.) 27,5 V DC
Voltage (operative) 11...30 V DC
Current (nom.) 0,3 A
Power consumption 10,25 W
Humidity max. 95 %
Operating temperature -55 - 70 °C
Storage temperature -55 - 85 °C
Connector Circular 37 pin

 

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

 

Block diagram

lun 1795 2 block diagram

list of signals and systems

 GPS1  ARINC 429 from GARMIN GTN 625
 GPS2  ARINC 429 from GARMIN GTN 675
 VOR1  Russian Synchro from KURS-MP-2 (or KURS-MP-70)
 VOR2  Russian Synchro from KURS-MP-2 (or KURS-MP-70)
 Vertical/Lateral Deviation  From KURS-MP-2 (or KURS-MP-70)
 Mag. Heading  Russian Resolver from TKS-P or GMK or GIK

 

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