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Equipment Installation Manual,
GDC31 Roll Steering Converter

APPENDIX C - TYPICAL INTERCONNECT

The following section contains typical interconnect diagrams to aid in wiring the GDC31.

All wiring, wire gauge and wire type shall be according to the INSTALLATION section of this manual.

Mounting shall use the hardware called out in this manual or AN / MS equivalent fasteners.

NOTE:

Many autopilot units provide both an AC and a DC excitation signal. Verify the HSI or DG is connected
to the autopilot signal and reference as shown in that diagram. Refer to the HSI or DG manufacturer’s
data and the autopilot manufacturer’s data for additional information.

1049-2510-01 G.doc

1049-2510-01

Rev G

Page 32 of 47

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Summary of Contents for GDC31

Page 1: ...T INSTALLATION MANUAL For the GDC31 ROLL STEERING CONVERTER P N 1049 4000 XX 001 REV G DAC International 6702 McNeil Drive Austin TX 78729 Copyright 2004 DAC International All rights reserved 1049 2510 01 G doc 1049 2510 01 Rev G Page 1 of 47 www travelholidayhotel com ...

Page 2: ...l kits into one universal kit and added instructions for configuration Added wiring diagram for Bonanza A 36 E306 7 26 04 LW D Omit approval pending E321 9 17 04 LW E Add numerous wiring diagrams E327 10 22 04 LW F Add additional wiring diagrams correct table 4 E389 3 30 05 LW G Add lighting bus circuit diagram to all wiring diagrams Omit jumper on drawings Fig 9 11 Add note to installation sectio...

Page 3: ...puts 10 AP Offset Input 11 Annunciator Output 11 Flag Input 11 Certification 11 Reliability 11 OPERATION 12 Overview 12 Analog Output 12 Reference Inputs Excitation 12 ARINC 429 Output 12 GPS Mode Annunciator Control 13 Super Flag Input 13 INSTALLATION 14 Material Not Supplied 14 Special Tools 14 Mounting Considerations 15 Wiring Considerations 15 Steering Output Scale Factor Determination 16 Conf...

Page 4: ...OUTPUT 31 Label 121 Bank Angle Command 31 Label 312 Ground Speed 31 APPENDIX C TYPICAL INTERCONNECT 32 Figure 1 Typical Interconnect 33 Figure 2 KI 525 525A with KA 52 KA 57 34 Figure 3 ARINC HSI with Century IV 35 Figure 4 ARINC HSI with S TEC 50 55 or 60 36 Figure 5 NSD 360A NSD 1000 with Century IV 37 Figure 6 NSD 360A NSD 1000 with S TEC 50 or 55 38 Figure 7 ARINC HSI with Century II or III 39...

Page 5: ...hard over The GDC31 provides lateral roll data only no pitch data is supplied by the GDC31 The ARINC 429 output can drive digital autopilots or converters The pilot simply selects between heading mode and GPS mode using the supplied switch annunciator In heading mode the autopilot operates as always tracking the heading bug of the HSI or DG In GPS mode the GDC31 RSS signal drives the autopilot s h...

Page 6: ...ter ARINC 429 High Speed 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 GDC31 software was developed in accordance with RTCA DO 178B to criticality level C PMA The Model GDC31 is approved via PMA Environmental The Model GDC31 meets the DO 160D environmental categories listed later in this m...

Page 7: ...for 28V operation For 14V operation see the section titled INSTALLATION Wiring Considerations Complete installation kits are available under kit part number 1049 4200 10 Individual pieces are available under the part numbers shown Contact DAC International sales to place orders Part Number Description Qty 1049 4200 10 Installation Kit GDC31 Data Converter M24308 2 3F Connector Receptacle 25 pin D ...

Page 8: ...lation Coupler 1049 4200 50 Installation Kit Isolation Coupler Complete installation kits are available separately under kit part number 1049 4200 50 Individual pieces are available under the part numbers shown Contact DAC International sales to place orders Part Number Description Qty 1049 4200 50 Installation Kit Isolation Coupler M24308 2 2F Connector Receptacle 15 pin D Sub 1 M39029 63 368 Soc...

Page 9: ...tional attaches to the airframe via four mounting holes See the paragraph titled Isolation Coupler Outline Drawing for further details Height 1 25 in Width 4 5 in Includes mounting flange Depth 2 41 in Weight 0 2 lb Annunciator Height 0 753 Width 0 753 Includes mounting flange Depth 1 99 Weight 0 05 lb Electrical Input Voltage 14 28 VDC 10Vdc 32Vdc operational Input Current 0 1 Amp maximum at 28 V...

Page 10: ...Rate 01 Low Speed 12 5kBaud 02 High Speed 100 kBaud Reference Inputs General Description AC or DC excitation used to excite the heading bug on the HSI or DG The GDC31 uses the reference input to produce a steering signal with correct phase and amplitude characteristics Two reference inputs are provided Use only one depending on the autopilot type The unused input will be a no connect See typical i...

Page 11: ...s a SPST switch intended to control an external GPS mode annunciator The GDC31 closes the contacts when the steering output is valid It cycles the contacts between open and closed at a 1 Hz rate if steering data is invalid Closed contacts connect pins P1 24 and P1 12 Max current 250mA Flag Input Description Valid input to the GDC31 at J1 25 supplied from a GPS receiver Super Flag output 14 or 28V ...

Page 12: ...ative to the reference input Certain installations Century II and III for example will not accept a heading error signal referenced to ground so require the Isolation Coupler in order to transformer isolate the GDC31 output signal Reference Inputs Excitation The GDC31 contains two reference inputs to accommodate the wide range of reference voltages available Input Ref1 will accommodate excitation ...

Page 13: ... GDC31 will cause the mode annunciator to blink at a 1 Hz rate and command the steering output to zero degrees of bank wings level The GPS mode annunciator blinks if either the super flag input is invalid or the serial data from the GPS is missing or not the correct format see Appendix A Super Flag Input The GDC31 reads the Super Flag 14 or 28Vdc from the GPS receiver If the flag is greater than 5...

Page 14: ...ble by the pilot Complete an electrical load analysis in accordance with AC 43 13 1B Chapter 11 prior to starting the aircraft modification to insure the aircraft has sufficient load capability Complete an aircraft weight and balance prior to aircraft modification to insure the aircraft has sufficient weight and CG margin Material Not Supplied The following items are required for the installation ...

Page 15: ... the pilot s primary field of view near the HSI or CDI Wiring Considerations Wiring should be done in accordance with AC 43 13 1B Chapter 11 Refer to the typical interconnect diagram later in this manual for specifics Use 22 to 24 AWG wire for all connections Fabricate wiring harness refer to the interconnect diagrams and pin description Test all the wiring for continuity and for shorts Insure air...

Page 16: ...nputs 2 each Tables 1 and 2 describe the program pin combinations for the various scale factors To determine the appropriate setting for a given autopilot first determine the autopilot excitation amplitude in volts AC or DC Next determine the autopilot scale factor from the autopilot maintenance data The scale factor needs to be expressed as volts degree of bank Divide the scale factor by the exci...

Page 17: ...n 1 0 011590 Open Ground 1 0 007687 Ground Open 1 0 003844 Ground Ground 1 Table 1 RSS Output Scaling Selection for Ref 1 input 1 For 14 volt aircraft maximum AC output signal is limited to 6 3 Vrms 210mV per degree or 8 9 Vdc 297mV per degree Gain Settings Using Ref 2 input J1 6 Scaling J1 10 J1 22 0 033444 Open Open 2 0 025606 Open Ground 2 0 016983 Ground Open 2 0 008492 Ground Ground 2 Table 2...

Page 18: ... signal produces a right turn a negative error signal produces a left turn Determine the correct phasing from the autopilot maintenance data then wire P1 13 accordingly If the phasing is incorrectly wired the autopilot will turn the opposite direction when coupled to the GDC31 Roll Steering Converter Phase P1 13 IN Phase with Reference Open OUT of Phase with Reference Ground Table 3 Phase Selectio...

Page 19: ...ordinator rate gyro Determine the autopilot type if it is rate based then connect J1 23 to program pin common J1 11 Baud Rate Selection The GDC31 will accept four 4 baud rates for GPS data configured using program pins P1 9 and P1 21 Baud Rate P1 9 P1 21 9600 Open Open 2400 Open Ground 4800 Ground Open 19200 Ground Ground Table 5 Serial Baud Rate Selection Note Use Program Pin Common J1 11 as grou...

Page 20: ...heckout in this manual Removal Mode Annunciator 1 Open the circuit breaker powering the GDC31 2 Pull firmly on the edges of the lens to disengage the lamp assembly from the body The lamp assembly will hinge out and away from the body 3 Release the two 2 pawls by unscrewing the flat head screws located inside the body 4 Unplug the lamp module from the sleeve Replacement Mode Annunciator 1 Open the ...

Page 21: ...serve that the control wheel turns left and right in response to the heading bug operation 7 Center the control wheel using the heading bug 8 Create and activate a flight plan in the GPS unit according to existing maintenance and or flight manual instructions 9 Place the HDG GPS Mode selector in the GPS position Observe GPS illuminates and is not blinking 10 Remove power from the GPS receiver 11 O...

Page 22: ...ates and is not blinking 8 Observe that the aircraft turns to intercept the course selected in Step 6 Note The GDC31 limits the intercept angle to 45º maximum Intercept angle difference between Desired Track and Track 9 Observe that the aircraft captures the course without overshoot or undershoot 10 Operate the heading bug observe that the heading bug has no effect 11 Select HDG on the HDG GPS Mod...

Page 23: ...ustrated Parts Catalog IPC 3 Wiring diagram information contained in the installation data package should be placed in the aircraft operator s appropriate airplane Wiring Diagram Manual 4 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 Inspe...

Page 24: ...rves L M and C Fixed Wing Turbojet Turbofan Turboprop and reciprocating Instrument Panel or Fuselage 9 0 Explosion Proofness X Not Tested 10 0 Waterproofness X Not Tested 11 0 Fluids Susceptibility X Not Tested 12 0 Sand and Dust X Not Tested 13 0 Fungus Resistance X Not Tested 14 0 Salt Spray X Not Tested 15 0 Magnetic Effect A 0 3 meter to 1 0 meter 16 0 Power Input B Alternator Rectifiers 17 0 ...

Page 25: ...mmon 12 GPS Lamp A GPS Mode Annun Relay Armature 13 Phase Select Phase select program pin 14 Power Common 28 Vdc Return 15 AP COM Autopilot Common ground 16 Serial Common RS232 Common 17 Reserved PGM Enable 18 AP REF1 Autopilot Reference 30Vac max 1 19 AP OFFSET Autopilot Offset Input A P Common 6Vdc max 20 429 Shield ARINC 429 Shield Common 21 BAUDSEL0 Serial Baud Rate Select 0 22 GAINSEL0 Autopi...

Page 26: ...Equipment Installation Manual GDC31 Roll Steering Converter OUTLINE DRAWINGS GDC31 Outline Note Dimensions are in inches 1049 2510 01 G doc 1049 2510 01 Rev G Page 26 of 47 ...

Page 27: ...l GDC31 Roll Steering Converter Switch Annunciator Outline PANEL CUTOUT 1 2 6 8 11 3 4 5 7 9 10 12 PIN OUT REAR VIEW Outline for part number P10280 Note Dimensions are in inches 1049 2510 01 G doc 1049 2510 01 Rev G Page 27 of 47 ...

Page 28: ...Equipment Installation Manual GDC31 Roll Steering Converter Isolation Coupler Outline 1049 2510 01 G doc 1049 2510 01 Rev G Page 28 of 47 ...

Page 29: ...CH ASSEMBLY Assemble the slide latch mechanism part number P10219 or P10053 onto the mating connector as pictured using the hardware supplied with the slide latch SLIDE LATCH SCREW CONNECTOR FLAT WASHER NUT LOCK WASHER 1049 2510 01 G doc 1049 2510 01 Rev G Page 29 of 47 ...

Page 30: ...4800 or 19200 baud Insure the GDC31 is configured for the correct baud rate refer to Serial Baud Rate Selection located earlier in this manual Aviation Data Format Description STX ASCII Start of Transmission character other data C284 cr track in degrees magnetic ex 284º D162 cr ground speed in knots ex 162 kt GR0050 cr crosstrack L left or R right in hundredths of nautical miles ex Right 0 5nm I28...

Page 31: ...rning 11 normal S sign bit 0 positive roll angle SDI source destination identifier always zero Data Range 180 Resolution 0 01 Label 312 Ground Speed Label 312 shall be formatted as follows 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 P SSM S Ground Speed PAD SDI Label 312 P odd parity SSM sign status matrix 00 fail ...

Page 32: ...ALLATION section of this manual Mounting shall use the hardware called out in this manual or AN MS equivalent fasteners NOTE Many autopilot units provide both an AC and a DC excitation signal Verify the HSI or DG is connected to the autopilot signal and reference as shown in that diagram Refer to the HSI or DG manufacturer s data and the autopilot manufacturer s data for additional information 104...

Page 33: ...PE SELECT 23 PHASE SELECT 13 PROGRAM PIN COMMON 11 1 2 3 4 PROGRAM PINS GPS INTERFACE AUTOPILOT INTERFACE 5 6 7 1 SEE TABLE 5 SEE TABLES 1 AND 2 2 SEE TABLE 4 3 SEE TABLE 3 4 FOR EXCITATION VOLTAGES GREATER THAN 15 VOLTS PEAK 5 6 FOR USE WITH AUTOPILOTS THAT USE A SIGNAL REFERENCE 7 SEE TABLES 1 AND 2 FOR EXCITATION VOLTAGES LESS THAN 15 VOLTS PEAK SEE TABLES 1 AND 2 THAT IS A VOLTAGE ABOVE AIRFRA...

Page 34: ... FLAG RS232 COM GPS RECEIVER HEADING ERROR LIGHTING BUS P 12 6 3 2 5 11 8 1 10 4 7 KI 525 525A BENDIX KING SIGNAL GROUND 15V 15V j Y f P10280 8 3 12 6 10 GPS HDG 6 8 10 3 25 16 15 14 1 19 24 6 12 5 RSC 2A 7277 2 2 F KA 57 BENDIX KING RSS CONVERTER GDC31 BENDIX KING F K 5 C 1 2 KA 52 TO AUTOPILOT RADIO COUPLER Super Flag Serial Com Serial In Lamp B Lamp A AP Out Offset Ref 2 AP Com A A 14 OR 28VDC ...

Page 35: ...EADING ERROR 7 1 5 4 2 11 GPS HDG 8 10 3 6 12 5 18 12 15 24 10 7 P10280 4 8 1 12 11 SWITCH ANNUN 11 22 1 3 14 25 16 3 6 2 5 P2 25 1041A 26 23 22 WILCOX 24 J2 M G RD 444 447 SPERRY J H N GPS RECEIVER SUPER FLAG RS232 COM RS232 OUT NOTE ID496 COMPUTER MUST BE ARINC TYPE ID496 X1XX2 GDC31 RSS CONVERTER D P201 KING E B A KPI 550 C H C Y X EXC Z HEADING PN 101 D E B C A COLLINS LIGHTING BUS A NIGHT DAY...

Page 36: ...ND HDG ERR IN SIG COM EXCITATION A NIGHT DAY A 14 OR 28VDC Figure 4 ARINC HSI with S TEC 50 55 or 60 Equipment Installation Manual GDC31 Roll Steering Converter 1049 2510 01 G doc 1049 2510 01 Rev G Page 36 of 47 HDG 10 P10280 SWITCH ANNUN COLLINS A C B E D PN 101 HEADING Z Y X EXC C H RS232 OUT RS232 COM SUPER FLAG LIGHTING BUS C B A 22 23 24 GPS RECEIVER J H G SPERRY RD 444 447 P201 D E KING KPI...

Page 37: ...rial Com Serial In Gain Sel 0 Prog Com Lamp B Lamp A AP Out Offset Ref 2 HEADING ERROR COMMON 14V 14V 13 36 43 GDC31 RSS CONVERTER CENTURY IV ID496 5 12 6 24 19 22 11 1 14 15 16 25 3 49 HDG GPS 10 6 12 3 8 P10280 19 20 NSD 360A NSD 1000 7 4 10 1 8 11 5 2 3 6 12 21 LIGHTING BUS GPS RECEIVER RS232 COM SUPER FLAG RS232 OUT SWITCH ANNUN 11 4 2 5 1 7 A NIGHT DAY A 14 OR 28VDC RSC 7277 2 2 2A ...

Page 38: ... 8 1 10 4 7 NSD 1000 NSD 360A 19 20 P10280 8 3 12 6 10 GPS HDG 31 3 25 16 14 1 11 23 19 24 12 5 RSC 2A 7277 2 2 RSS CONVERTER GDC31 39 4 50 S TEC 25 27 S TEC 55 38 28 43 P1 15 6 Super Flag Serial Com Serial In Type Sel 0 Prog Com Lamp B Lamp A AP Out Offset Ref 2 AP Com EXCITATION GND 10VDC EXCITATION HEADING ERROR SIGNAL REF 60 P1 S TEC A NIGHT DAY A 14 OR 28VDC Figure 6 NSD 360A NSD 1000 with S ...

Page 39: ... 7 RD 444 447 SPERRY PN 101 COLLINS KING KPI 550 1041A WILCOX P10280 SWITCH ANNUN 3 12 6 10 8 2 GPS 11 GDC31 4 HDG 1 5 7 1049 4801 01 CD 33 PIGTAIL CD 33 PIGTAIL HDG COM ROLL EXCITATION ROLL EXCITATION HEADING ERROR 13 14 11 6 5 RSC 7277 2 2 2A 10 4 3 9 12 2 1 E A F D E A B D 14 OR 28VDC 4 13 ISOLATION COUPLER 12 14 11 2 9 6 10 5 CENTURY IC388 3 CENTURY IC388 MC 1 3 Super Flag Serial Com Serial In...

Page 40: ...19 X FLIGHT COMPUTER P19 X 2 10 A 4 5 AP OUT 3 Strap for GPS baud rate per GDC31 installation manual NIGHT DAY 6 2 12 5 11 1 8 22 GAINSEL0 PHASE SELECT TYPE SELECT BAUDSEL1 BAUDSEL0 14 1 21 9 AP OFFSET 23 19 13 PROG PIN COMMON GAINSEL1 GPS LAMP B 11 10 24 GPS LAMP A AP REF2 AP COM 12 6 15 RSS CONVERTER SWITCH ANNUNC P10280 10 7 GDC31 X 20 19 P19 X 1 F KFC 150 6 RSC 2A SIGNAL GND CHASSIS GND 12 GPS...

Page 41: ...RSC 7277 2 2 2A 7 5 1 4 2 11 SWITCH ANNUNC RSS CONVERTER GAINSEL1 GAINSEL0 PHASE SELECT TYPE SELECT AP OFFSET GPS LAMP A GPS LAMP B AP OUT AP REF2 PROG PIN COMMON AP COM 20 EXC A NIGHT DAY 21 11 24 6 2 5 3 12 10k 23 19 13 10 22 11 8 1 7 4 10 6 12 15 5 SWITCH ANNUNC P10280 NSD 360A NSD 1000 IG 832 A C EXC 19 GDC31 8 19 400HZ RTN AC HDG IN CHASSIS GND 35 20 12 6 3 HDG GPS 10VAC 400HZ SPERRY ARC 400B...

Page 42: ...R HDG 10 P10280 SWITCH ANNUN A B 52D54 E D DG 12 3 6 1 8 4 7 3 2 1 11 2 GPS COUPLER ISOLATION 2 8 10 7 4 1 5 1 24 Lamp B Serial Com 3 Serial In Super Flag 25 16 10 Gain Sel 1 Type Sel 0 1 14 23 Offset Prog Com 19 11 15 7277 2 2 46 RSC 2A GROUND S TEC 5 4 Ref 1 Lamp A AP Out 12 18 5 GDC31 RSS CONVERTER 6 S TEC 55 S TEC 15 25 50 60 3 HDG ERROR SIG REF EXCITATION 8 A NIGHT DAY A 14 OR 28VDC Figure 10...

Page 43: ...PER FLAG IN 16 25 14 3 1 7277 2 2 2A DC HDG IN CA 550A FD DC HEADING DATUM SPERRY ARC 400B 10VDC REG 10VDC REG SIGNAL GND CHASSIS GND NIGHT DAY A 6 3 2 5 8 11 12 1 4 7 GAINSEL1 GAINSEL0 PHASE SELECT TYPE SELECT AP OFFSET BAUDSEL1 BAUDSEL0 23 9 21 19 22 13 10 GPS LAMP A GPS LAMP B AP OUT AP REF2 PROG PIN COMMON AP COM 6 24 11 12 5 15 35 21 SWITCH ANNUNC 10 P10280 RSS CONVERTER GDC31 27 24 10 J1 P4 ...

Page 44: ...section Strap for GPS baud rate per NIGHT 6 11 12 DAY 2 3 5 1 8 AP OFFSET BAUDSEL1 BAUDSEL0 TYPE SELECT 21 SERIAL IN 14 3 1 9 23 19 PHASE SELECT GPS LAMP A GPS LAMP B PROG PIN COMMON 11 GAINSEL1 GAINSEL0 13 22 10 AP REF2 12 24 6 RSS CONVERTER P10280 10 7 4 SWITCH ANNUNC CD175 GDC31 AP OUT 5 17 20 12 GPS SCHEMATIC SWITCH ANNUNC 3 2A 7277 2 2 RSC 12 6 8 HDG 10 P10280 2 11 4 1 5 7 CD220 HDG CRS DC EX...

Page 45: ... 5 12 18 7 10 IU445 003 17 IU445 004 11 P10280 SWITCH ANNUN 3 12 6 10 8 2 GPS 11 GDC31 4 HDG 1 5 7 1049 4801 01 CD 33 PIGTAIL ROLL EXCITATION ROLL EXCITATION HEADING ERROR 13 14 11 6 5 10 4 3 9 12 2 1 E A D 4 13 ISOLATION COUPLER 12 14 11 2 9 6 10 5 CENTURY IC388 2 1 3 Super Flag Serial Com Serial In Phase Sel Gain Sel 0 Prog Com Lamp B Lamp A AP Out AP Com Ref 1 NSD 1000 NSD 360A EXC EXC HDG SIGN...

Page 46: ... BUS RS232 OUT RS232 COM SUPER FLAG 12 2 6 5 3 4 HDG 10 P10280 SWITCH ANNUN T S HSI 70C HH JJ 12 3 6 1 8 4 7 3 2 1 11 2 GPS COUPLER ISOLATION 2 8 10 7 4 1 5 1 24 Lamp B 14 OR 28VDC Serial Com 3 Serial In Super Flag 25 16 1 14 15 7277 2 2 RSC 2A 5 4 Ref 1 Lamp A AP Out 12 18 5 GDC31 RSS CONVERTER 6 ARC 1000 3 H EXC C H C ERR HDG 2 28 26VAC 400HZ AC HDG SIG AC HDG COM A NIGHT DAY A ...

Page 47: ... SERIAL COM 25 16 BAUDSEL0 SERIAL IN TYPE SELECT AP OFFSET BAUDSEL1 21 14 3 1 9 19 23 RSC 14 OR 28VDC 2A KFC 200 KFC 300 COMPUTER Y DAY 12 2 3 5 11 1 8 P S j 10 4 7 PHASE SELECT PROG PIN COMMON GAINSEL1 GAINSEL0 GPS LAMP A GPS LAMP B AP REF2 11 13 22 10 24 12 6 AP OUT AP COM 15 5 SWITCH ANNUNC KI 525A f A1 P10280 RSS CONVERTER GDC31 K 15 VDC REG SIGNAL GND SCHEMATIC 3 6 10 8 1 GPS HDG 2 5 4 7 SWIT...

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