HPU-74

FEATURES

• HSI Processor Unit used in EHSI-74 Electronic HSI System
• Processes input data from various sources such as VOR/LOC/Glideslope receivers, compass systems, DME, flight control systems, RNAV, VNAV, ADF, LORAN, TACAN to develop a display of horizontal navigation situation and other navigational data on EFD-74 Display
• 
  
  PLEASE NOTE: Inputs processed are version dependent, see table below for breakdown
• Versions available to interface with Foster RNAV912 systems (see table below)
• Version available that provides interface compatible with King autopilots (see table below)

SPECIFICATIONS

Env. Categories:	F2B/JY/XXXXXXA/BZ/AZA	Size:	4.875"W x 3.31"H x 13.97"L
Weight:	4.3 lbs.	Mounting:	Remote mounted, 1/2-ATR, short, dwarf
Temperature:	-55 to +70C	Altitude:	up to 55000 ft.
Power Requirements:	27.5 VDC, 1.1A (typical)

Part Number	HSI Processor Unit Description:
622-6198-001	Standard unit, displays inputs from 2-VOR,1-DME,1-ADF,NCS-31 RNAV, & analog or digital heading
622-6198-002	Same as -001 except can also display inputs from LRN, TACAN, and second ADF
622-6198-003	Same as -002 except RNAV interface is compatible w/ Foster RNAV612 and Foster LNS616A (w/SB4)
622-6198-012	Same as -002 except is capable of displaying cross-side NAV and cross-side LRN
622-6198-013	Same as -012 except RNAV interface is compatible with Foster RNAV612 and Foster LNS616A
622-6198-014	Same as -013 except course and heading datum outputs are biased to 393 mV/degree to provide interface compatible with King autopilots
622-6198-102	Same as -002 except ARINC 561 LRN data bus timeout is reduced and DME transfer will not affect RNAV data display color
622-6198-103	Same as -003 except ARINC 561 LRN data bus timeout is reduced and DME transfer will not affect RNAV data display color
622-6198-112	Same as -012 except ARINC 561 LRN data bus timeout is reduced, DME transfer will not affect RNAV data display color, and NAV (VOR/ILS) and DME may be independently switched
622-6198-113	Same as -013 except ARINC 561 LRN data bus timeout is reduced, DME transfer will not affect RNAV data display color, and NAV (VOR/ILS) and DME may be independently switched
622-6198-114	Same as -014 except ARINC 561 LRN data bus timeout is reduced, DME transfer will not affect RNAV data display color, and NAV (VOR/ILS) and DME may be independently switched

PLEASE NOTE: THE ABOVE LISTED PART NUMBERS REFLECT THE DIFFERENT UNITS ORIGINALLY AVAILABLE BY THE MANUFACTURER AND DO NOT NECESSARILY INDICATE OR REFLECT THE CURRENT AVAILBILITY OF THESE DIFFERENT UNITS BY SOUTHEAST AEROSPACE OR THE AFTERMARKET