Garmin GRA 5500 Installation Manual

Contents

Garmin GRA 5500 Installation Manual Manual pdf 51 page image

GRA 5500 Installation Manual 190-01277-00Page 4-4 Rev. A4.3.2 ARINC 429The GRA 5500 provides two independently configurable ARINC 429 output interfaces which conform toARINC 429 electrical specifications when loaded with up to 5 standard ARINC 429 receivers.In non-GIFD (retrofit) installations, GRA 5500 altitude information is output from this interface. TheARINC 429 outputs can be configured for low speed (12.5 kbps) or high speed (100 kbps) operation.The ARINC 429 labels in Table 4-5 can be output from the unit and are configurable via the GRA 5500Retrofit Installation Tool (see Section 3.7.2):During “No Computed Data” conditions (operation above 2550 ft AGL or insufficient return signalconditions below 2550 ft AGL) the sign/status matrix bits of Label 164 and Label 165 are set to indicate“No Computed Data” and the altitude bits of each label are set to indicate 4000 ft. If a unit fault is foundduring normal operation, the sign/status matrix bits of Label 164 are set to indicate “Fail” and the altitudebits are set to indicate 4000 ft. During a “Fail” state Label 165 is not transmitted.4.3.3 Configuration ModuleUse of a configuration module in Garmin Integrated Flight Deck (GIFD) installations is not required. Fornon-GIFD (retrofit) installations, use of a configuration module is optional to retain configuration settingsoutside of the individual LRU.Table 4-4 ARINC 429Pin Name Pin I/OARINC 429 OUT 1 A 52 OutARINC 429 OUT 1 B 55 OutARINC 429 OUT 2 A 10 OutARINC 429 OUT 2 B 4 OutTable 4-5 ARINC 429 Output LabelsLabel Description Output Data Rate/Period164 Radio Altitude (BNR format) 20 Hz/50 msec165 Radio Altitude (BCD format) 20 Hz/50 msec377 Equipment Identification 20 Hz/50 msecTable 4-6 Configuration ModulePin Name Pin I/OCONFIG MODULE DATA** 40 OutCONFIG MODULE CLOCK** 47 OutCONFIG MODULE GROUND** 48 --CONFIG MODULE POWER** 53 Out**Signals have ESD (Electrostatic Discharge) protection, but no lightning protection.DRAFT