GDC Data Converter EQUIPMENT INSTALLATION MANUAL For the GDC DATA CONVERTER P/N ---( ) ARINC TO ARINC DAC International McNeil Drive Austin, TX Copyright, DAC International. All rights reserved. -- IR.doc -- Rev IR Page of
GDC Data Converter Table Of Contents RECORD OF REVISIONS... INTRODUCTION:... DESCRIPTION:... PART NUMBERS:... REGULATORY COMPLIANCE:... Software... SUPPLIED EQUIPMENT... SPECIFICATIONS:... Physical:... Electrical:... Data Input:... Data Output:... Reliability:... OPERATION:... Timeout of Input Data... REMOVAL AND REPLACEMENT... Removal... Replacement... EQUIPMENT CHECKOUT... CONTINUED AIRWORTHINESS:... ENVIRONMENTAL:... CONNECTOR PIN OUT:... TYPICAL INTERCONNECT... OUTLINE DRAWING... SLIDE LATCH ASSEMBLY... APPENDIX A... Pressure Altitude Modifications... Baro-corrected Altitude Modifications... Mach Number Modifications... Computed Airspeed Modifications... True Airspeed Modifications... Altitude Rate Modifications... Static Air Temperature Modifications... -- IR.doc -- Rev IR Page of
GDC Data Converter RECORD OF REVISIONS REV DESCRIPTION DATE APPROVED IR INITIAL RELEASE E -- LW -- IR.doc -- Rev IR Page of
GDC Data Converter INTRODUCTION: This manual contains installation data, specifications and Instructions for Continued Airworthiness for the DAC International Model GDC Data Converter, Part Number ---( ). DESCRIPTION: GDC Data Converters with software version ( ) are designed to convert data received from a Digital Air Data Computer in ARINC format into ARINC format. PART NUMBERS: The GDC Data Converter is available under the following part number: ---( ) ARINC to Converter Software part number, where ( ) contains the number zero for initial release, or any letter, A Z to denote a minor change. REGULATORY COMPLIANCE: Software The Model GDC software was developed in accordance with RTCA/DO-B to criticality level C. -- IR.doc -- Rev IR Page of
GDC Data Converter SUPPLIED EQUIPMENT Each Data Converter is shipped with the following items: Part Number Description Qty ---( ) GDC Data Converter -- Installation Kit, GDC Data Converter Complete installation kits are available under kit part number --. Individual pieces are available under the part numbers shown. Contact DAC International sales to place orders. Part Number Description Qty -- Installation Kit, GDC M/-F Connector, Receptacle, pin D-Sub M/- Socket, Crimp Style, female P Slide Latch Kit P Backshell, -Pin D-Sub -- Equipment Installation Manual for the GDC -- IR.doc -- Rev IR Page of
GDC Data Converter SPECIFICATIONS: Physical: The GDC attaches to the airframe via four mounting holes. See the paragraph titled Outline Drawing for further details. Height... Width... (Includes mounting flange) Depth... Weight... lb. Electrical: Input Voltage... VDC Nominal (Vdc Vdc operational) Input Current... Amp at VDC Data Input: Format...ARINC Baud Rate... kbaud Data Output: Format...ARINC Baud Rate... kbaud Reliability: MTBF...Greater than, hours. -- IR.doc -- Rev IR Page of
GDC Data Converter OPERATION: The GDC Data Converter fitted with software ( ) converts the following ARINC labels to ARINC format: Label (Octal) Description Rate Altitude (Pressure).mS Altitude (Barometric).mS Mach () ms Computed Airspeed, CAS ms True Airspeed ms Altitude Rate.mS Static Air Temperature () ms Any other labels received from the ARINC source are discarded. () Non-standard ARINC label. See Appendix A The converted ARINC data labels are transmitted at the rates described in the table above. Timeout of Input Data Labels not received for five () or more times shall be considered stale. The GDC shall halt transmission of stale data. Rate.mS ms ms Time-out ms ms ms (. seconds) -- IR.doc -- Rev IR Page of
GDC Data Converter REMOVAL AND REPLACEMENT Removal. Open the circuit breaker powering the GDC.. Remove the connector by disengaging the slide latch then pulling the connector free.. Remove four () screws securing the unit to the airframe. Replacement. Open the circuit breaker powering the GDC.. Attach the unit to the airframe with four () screws.. Seat the connector pressing on the engaging the slide to secure.. Close circuit breaker.. Perform operational test of the GDC as prescribed in the aircraft maintenance manual. EQUIPMENT CHECKOUT The GDC provides conversion of the ARINC data produced by the DADC into ARINC format for use by the Weather RADAR system. There are no operator controls associated with the GDC unit. The DADC and Weather RADAR must both be operational in order to perform this functional checkout.. Apply power to the DADC and Weather RADAR. Perform the functional test of the RADAR system according to existing, approved maintenance data. -- IR.doc -- Rev IR Page of
GDC Data Converter CONTINUED AIRWORTHINESS: This section provides data intended to assist the installer with establishing Instructions for Continued Airworthiness as required by FARs.,.,. and... Maintenance Manual information for the GDC, which includes system description, removal instructions, installation instructions and functional testing is contained in DAC International Installation Manual, -- (this document).. Line Replaceable Unit (LRU) part numbers and other parts contained in the installation data package should be placed in the aircraft operator s appropriate airplane Illustrated Parts Catalog (IPC).. Wiring diagram information contained in the installation data package should be placed in the aircraft operator s appropriate airplane Wiring Diagram Manual.. Scheduled Maintenance Program tasks are as follows: a. Recommended Periodic Scheduled Servicing:... None required b. Recommended Periodic Scheduled Preventive Maintenance Tests... None Required c. Recommended Periodic Inspections:... None Required d. Recommended Periodic Overhaul Period... None Required e. Special Inspection Requirements... None Required. Application of Protective Treatments... None Required. Special Tools... None Required. Electrical Loads for this appliance are as specified in the DAC International Installation Manual, -- (this manual).. There are no Airworthiness limitations associated with the installation of this appliance. -- IR.doc -- Rev IR Page of
GDC Data Converter ENVIRONMENTAL: The GDC meets the environmental test categories detailed below in accordance with RTCA/DO-D, Environmental Conditions and Test Procedures for Airborne Equipment. NOMENCLATURE: Model GDC Data Converter PART NO: ---XXXX MANUFACTURER: DAC International ADDRESS: McNeil Drive, Austin, TX Section Category Remarks. Temperature and Altitude D, Ft Temperature controlled. Temperature Variation B Partially controlled temperature. Humidity A Standard Humidity. Operational Shock and Crash Safety D Fixed wing. Vibration L, M, C Fixed Wing Turbojet, Turbofan, Turboprop and reciprocating. Explosion Proofness X Not Tested. Waterproofness X Not Tested. Fluids Susceptibility X Not Tested. Sand and Dust X Not Tested. Fungus Resistance X Not Tested. Salt Spray X Not Tested. Magnetic Effect A. meter to. meter. Power Input B Alternator / Rectifiers. Voltage Spike B volts. AF Conducted Susceptibility Power B Inputs. Induced Signal Susceptibility A. Radio Frequency Susceptibility V volts/meter (Radiated and Conducted). Emission of Radio Frequency Energy B. Lightning Induced Transient X Not Tested Susceptibility. Lightning Direct Effects X Not Tested. Icing X Not Tested. ESD X Not Tested Alternator / Rectifiers -- IR.doc -- Rev IR Page of
GDC Data Converter CONNECTOR PIN OUT: The GDC contains a single -pin male connector, J, per MIL-C-, part number M/-F. The mating connector, P, is described previously under the section Equipment Supplied. Pin Signal Function A+ Vdc Primary Power Reserved (RS Output) Reserved (RS Input) Reserved (+Vdc Vpp) RX-A Receive A RX-B Receive B TX-A Transmit A TX-B Transmit B Power Common Vdc Return Aircraft Common Chassis ground Reserved (RS return) Reserved (/PGM Enable) Common RX Shield Spare (Common) Common TX Shield J Pin Description NOTE: Do not use pins labeled Reserved. These are for factory test and In-Circuit-Programming -- IR.doc -- Rev IR Page of
POWER SUPPLY GDC P + VDC COMMON CHASSIS RX-A RX-B TX-A TX-B <- ->.A + VDC BUS DADC TX-A TX-B SHIELD RX-A RX-B SHIELD RADAR Equipment Installation Manual, GDC Data Converter TYPICAL INTERCONNECT -- IR.doc -- Rev IR Page of
GDC Data Converter OUTLINE DRAWING Note: Dimensions are in inches. -- IR.doc -- Rev IR Page of
GDC Data Converter SLIDE LATCH ASSEMBLY Assemble the slide latch mechanism, part number P, onto the mating connector as pictured using the hardware supplied with the slide latch. NUT LOCK WASHER FLAT WASHER CONNECTOR SLIDE LATCH SCREW -- IR.doc -- Rev IR Page of
GDC Data Converter -- IR.doc -- Rev IR Page of APPENDIX A Pressure Altitude Modifications Pressure altitude shall be received as ARINC BNR label. The input format is expected to be as follows: P SSM Altitude ('s compliment if negative) pad (octal) : positive : fail/warning : no computed data : negative Resolution:. foot Pressure altitude shall be transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Altitude ('s compliment if negative) SDI (octal) : fail/warning : no computed data : test (not used) : normal (input SSM positive or negative) S = sign bit, =positive SDI = Source Designation Indicator set to Range: +/- Resolution:. foot
GDC Data Converter Baro-corrected Altitude Modifications Baro-corrected altitude shall be received as ARINC BNR label. The input format is expected to be as follows: P SSM Baro Altitude ('s compliment if negative) pad (octal) : positive : fail/warning : no computed data : negative Operational Range: - to, feet Resolution:. foot Baro-corrected altitude shall be transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Baro Altitude ('s compliment if negative) SDI (octal) : fail/warning : no computed data : test (not used) : normal (input SSM positive or negative) S = sign bit, =positive SDI = Source Designation Indicator set to Range: +/- Resolution:. foot -- IR.doc -- Rev IR Page of
GDC Data Converter Mach Number Modifications Mach Number shall be received as a modified version of ARINC BNR label. The format transmitted to the GDC differs from standard ARINC in that the data is shifted two places right and the maximum value is limited to Mach.. The input format is expected to be as follows: P SSM pad Binary mach number pad (octal) : positive : fail/warning : no computed data : negative Operational Range:. to. Resolution:. Mach Note: This input format is not standard ARINC. Input data shall be reformatted and transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Binary mach number pad SDI (octal) : fail/warning (input SSM fail/warning or negative) : no computed data : test (not used) : normal (input SSM positive) S = sign bit, =positive SDI = Source Designation Indicator set to Range:. Resolution:. -- IR.doc -- Rev IR Page of
GDC Data Converter Computed Airspeed Modifications Computed Airspeed shall be received as ARINC BNR label. The input format is expected to be as follows: P SSM Airspeed ('s comp. if negative) pad (octal) : positive : fail/warning : no computed data : negative Operational Range: to knots Resolution:. knots Computed Airspeed shall be transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Airspeed ('s compliment if negative) pad SDI (octal) : fail/warning (input SSM fail/warning or negative) : no computed data : test (not used) : normal (input SSM positive) S = sign bit, =positive SDI = Source Designation Indicator set to Range: +/- knots Resolution:. knot -- IR.doc -- Rev IR Page of
GDC Data Converter True Airspeed Modifications True Airspeed shall be received as ARINC BNR label. The input format is expected to be as follows: P SSM Airspeed ('s comp. if negative) pad (octal) : positive : fail/warning : no computed data : negative Operational Range: to knots Resolution:. knot True Airspeed shall be transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Airspeed ('s compliment if negative) pad SDI (octal) : fail/warning (input SSM fail/warning or negative) : no computed data : test (not used) : normal (input SSM positive) S = sign bit, =positive SDI = Source Designation Indicator set to Range: +/- knots Resolution:. knot -- IR.doc -- Rev IR Page of
GDC Data Converter Altitude Rate Modifications Altitude Rate shall be received as ARINC BNR label. The input format is expected to be as follows: P SSM Rate ('s comp. if negative) pad (octal) : positive : fail/warning : no computed data : negative Operational Range: +/-, feet/minute Resolution: feet/minute Altitude Rate shall be transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Altitude Rate ('s compliment if negative) : fail/warning : no computed data : test (not used) : normal (input SSM positive or negative) S = sign bit, =positive SDI = Source Designation Indicator set to Range: +/- fee/minute Resolution: feet/minute pad SDI (octal) -- IR.doc -- Rev IR Page of
GDC Data Converter Static Air Temperature Modifications Static Air Temperature shall be received as ARINC BNR label. The format transmitted to the GDC differs from standard ARINC in that the data is shifted two places right. The input format is expected to be as follows: P SSM pad Temperature ('s compliment if negative) : positive : fail/warning : no computed data : negative Operational Range: Resolution: - to + degrees. degree pad (octal) Note: This input format is not standard ARINC. Static Air Temperature shall be transmitted as ARINC BNR label. The transmit format shall be as follows: P SSM S Temperature ('s compliment if negative) : fail/warning : no computed data : test (not used) : normal (input SSM positive or negative) S = sign bit, =positive SDI = Source Designation Indicator set to Range: Resolution: to degees. degree C pad SDI (octal) -- IR.doc -- Rev IR Page of