INSTALLATION MANUAL AND OPERATING
Contents
1. OBS or LEG 3 MSG and or WPT may be flashing depending on the status of the GPS receiver Press the lamp test button all annunciations should light Continue pressing the lamp test button and cover the photocell window located on the left side of the front panel All annunciations should dim Annunciation brightness at the minimum dimming level may be adjusted by rotation of the dimmer control located on the right side of the MD41 case CW rotation lowers the dimming level Select NAV using the NAV GPS button The presentation on the HSI CDI will now be information from the VOR receiver Using a VOR test generator or eguivalent VOR signal verify that the presentation and operation of the HSI CDI is correct This will include course resolver left right meter to from meter and nav warn flag Now select GPS on the MD41 and tune the VOR receiver to an ILS frequency The MD41 will be forced to NAV mode and ILS information will be displayed on the HSI CDI NOTE this feature will not work if ILS Energize J1 pin 14 was not connected at the time of installation Next verify that OBS and LEG annunciations will cycle alternately when pressing the OBS LEG button two times Press the GPS APR button and the ARM annunciation will illuminate ARM can be canceled by pressing the GPS APR button a second time or by ACTV input from the GPS receiver GPS APR test will not work without a valid GPS signal Please refer to section 2 4 of the K2. REAR VIEW OF JI bottom CONNECTOR JI PINNO ler NO7 RELAY e a NC7 RELAY Fe ILS ENERGIZE TO AUTOPILOT Z MENITA ILS FROM NAV VOR REC for autopilot ete eels C8 RELAY A EON NC8 RELAY g E N natn ia NO8 RELAY em e GPS APR ACTV ANNUNCIATION l SE ta OBS HOLD logic low to GPS reset MSG ANNUNCIATION V oseh WPT ANNUNCIATION enje 14 VDC UNIT PWR 324 334 ONLY i PORE 28 VDC UNIT PWR 328 338 328 5V 338 5V ONLY V satel ce ILS FROM NAV VOR REC for ILS override optional 15 ss C7 RELAY loose APR ARM ANNUNCIATION EET GPS DISPLAYED gnd to GPS ENE C5 RELAY pe NC5 RELAY renset DIM LOW to lighting bus for push button lighting O dement DIM HIGH to lighting bus for push button lighting DD isdans NO5 RELAY p one TO NAV CIRCUIT BREAKER for fault monitoring pe GPS ARM momentary logic low to GPS Jose POWER GROUND FIGURE 3 1 SCHEMATIC PINOUT 25 PIN DSUB REV 4 Jan 09 1997 10 KOL KJE 00000000 000000000 s Note 1 All relays shown in NAV position FIGURE 3 2 SCHEMATIC PINOUT 50 PIN DSUB REV 4 Jan 09 1997 11 MD156 Front Mounting Plate Optional must be ordered from Mid Continent Inst ae TA AN CJ l aa ENN lt po 1 61 x A Be l Z ACTUAL SIZE Note 1 Use four 4 40 X 3 8 to 1 0 Flat Head Phillips Screws for Mounting MCI PN 7016165 supplied MD155 punch is available for hole cutout FIGURE 3 3 CUTOUT DIMENSIONS
3. HSI CDI GPS APR Momentary switch when pressed will arm GPS Approach Mode OBS LEG Alternate action switch when pressed will select between OBS and LEG modes LAMP TEST Momentary switch for testing annunciation lamps Note Screwdriver adjustable control located on right side of case sets annunciator low dimming level 1 2 4 2 ANNUNCIATIONS NAV NAV VOR information presented on the HSI or CDI GPS GPS information presented on the HSI or CDI ARM GPS is armed for automatic transition to approach mode ACTV GPS is actively engaged in the approach mode REV 4 Jan 09 1997 OBS This will activate the course selector and also disable the automatic GPS waypoint sequencing to the next leg LEG This will disable the course selector input to the GPS and will enable automatic GPS waypoint sequencing to the next leg of the pre planned route MSG GPS message alert from the GPS receiver WPT GPS waypoint alert from the GPS receiver 1 2 5 INTERFACE APPR ARM Select JI Pin 24 APPR ARM J1 Pin 16 OBS LEG Select JI Pin 9 GPS APR ACTV JI Pin 8 ILS Override JI Pin 14 AP ILS Energize JI Pin 3 NAV Receiver ILS J1 Pin 4 MSG and WPT annunciation GPS DISPLAYED JI pin 17 REV 4 Jan 09 1997 Provides a momentary logic low to GPS receiver when approach arm is selected Receives a logic low from the GPS receiver to annunciate ARM Provides a logic low to the GPS receiver when OBS is selected Receives a l
4. level light conditions A 19 pole relay assembly is included within the MD41 to simplify installation of the switching between NAV VOR GPS and the associated HSI CDI All relays have gold plated contacts and are nitrogen filled for high reliability Two versions are available that will allow the lighted selection buttons to operate from a 5 volt instrument dimming bus These part numbers are as follows MD41 328 5V and MD41 338 5V A MD156 adapter plate is available for front mount installations Also a MD155 punch is available for instrument hole cutout 1 2 SPECIFICATIONS TECHNICAL 1 2 1 PHYSICAL CHARACTERISTICS Mounting Panel Width 3 50 Inches Height 1 350 Inches Depth 4 625 Inches Weight 0 75 Ibs REV 4 Jan 09 1997 1 2 2 ENVIRONMENTAL CHARACTERISTICS TSO Compliance TSO C129 Applicable Documents RTCA DO 160C DO 208 Operating Temperature Range 55 C to 70 C Humidity 95 Non Condensing Altitude Range 0 to 55 000 ft Vibration Cat M and N Operational Shock Rigid Mounting 6 G Operational 15 G Crash Safety 1 2 3 SPECIFICATIONS ELECTRICAL Design All Solid State MD41 324 334 14VDC 0 65 Amps MD41 328 338 28VDC 0 40 Amps MD41 328 5V 338 5V 28VDC 0 40 Amps Relay contact current rating 2 Amps DC Available relay poles SPDT 19 1 2 4 FRONT PANEL CONTROLS AND ANNUNCIATIONS 1 2 4 1 CONTROLS NAV GPS Alternate action switch when pressed will select NAV VOR or GPS presentation on
5. 41 328 28V Horiz Mount MD41 334 14V or MD41 338 28V Vert Mount MD41 328 5V 28volt 5 volt button lighting Horiz Mount MD41 338 5V 28volt 5 volt button lighting Vert Mount J1 Connector Kit 25 pin MCI PN 7014517 J2 Connector Kit 50 pin MCI PN 7014509 Installation Manual MCI PN 7016074 4 40 x 1 0 Mounting Screws 4ea MCI PN 7016165 Mu o gt 3 3 MOUNTING THE MD41 Plan a location in the aircraft for the MD41 to be mounted as close to the pilot s field of view as possible The preferable location is near the HSI CDI that will be displaying the GPS information Avoid mounting close to heater vents or other high heat sources Allow a clearance of at least 3 inches from back of unit for plug removal The indicator is secured in place behind the panel since it is designed for rear mount only Make a panel cutout as shown in Figure 3 3 Secure the indicator in place with four 4 40 x 3 8 to 1 0 flat head phillips screws A MD156 adapter plate is available for front mount installations Also a MD155 punch is available for hole cutout 3 4 INSTALLATION LIMITATIONS Wire the aircraft harness according to figure 3 5 or 3 6 Use at least 24 AWG wire for all connections You MUST use shielded wire where shown Avoid sharp bends and routing cable near high energy sources Care must be taken to tie the harness away from aircraft controls and cables Normal installation techniques should be applied REV 4 Jan 09 1997 9
6. AND C8 ARE CONTROLLED BY NAV GPS SELECT VITCH 5 ALL WIRING SHALL BE 24 AWG UNLESS OTHERWISE NOTED 6 USE INTERLOCK ONLY IF EXTER RELAYS ARE TO BE ADDED JUMPER MUST BE OPENED INSIDE UNIT ON RELAY BOARD ANNUNCIATE INTERLOCK AR 7 PIN 27 IS ALSO USED FOR OTHER G JNDS POWER GND note 6 ANNUNCIATE INTERLOCK v FIGURE 3 5 WIRING DIAGRAM MD41 324 334 KLN 90B 14V REV 4 Jan 09 1997 14 NOTE 6 21l 28VDC OR SV DIM TO DIM BUS for JIM LOW z AIRCRAFT PWR za O MD41 CIRCUIT GND 2A NO5 3 AUTOPILOT ILS ENERGIZE to autopilot pushbutton lighting BREAKER 4 J ILS ENERGIZE FROM NAV RECEIVER for autopilot localizer engage NAV CIRCUIT BREAKER for fault monitoring Z 6 8 7 8 14 S ENERGIZE FROM NAV RECEIVER note 1 8 GPS APR ACTV LEG CONTROL C ANN 11 WPT ANN 24 APPR ARM SELECT 186 APRR ARM 17 GPS DISPLAYED 1 FLAG 19 FLAG 20 21 A 25 Ni 22 ROTOR C A ROTOR H i 31 TATOR F A 27 note 8 STATOR G k 28 A gt 7 37 E U HSI CD FROM TO D BAR LEFT A te D BAR RIGHT ROTOR C A TJ ROTOR H G STATOR A STATOR G ST
7. ATOR D A STATOR E U ri NAV CONVERTER NAV FLAG4 NAV FLAG NAV FROM AV TO NAV D BAR LEFT f NAV D BAR RIGHT AV ROTOR C A NAV ROTOR H i AV STATOR F A NAV STATOR G U NAV STATOR D A IAV STATOR E U ex a Fi NOTES 1 CONNECT ONLY IF SYSTEM IS TO BE FORCED TO NAV WHEN ILS SELECTED 2 RELAYS IN NORMALLY CLOSED POSITION WITH NAV SELECTED 3 REFER TO BENDIX KING INSTALLATION MANUAL FOR ACTUAL NSTALLATION 4 RELAYS C1 C2 C3 C4 C5 C7 AND C8 ARE CONTROLLED BY NAV GPS SWITCH 5 ALL WIRING SHALL BE 24 AWG OTHERWISE NOTED 6 MD41 WILL HAVE BUTTON LIGHTING MD41 3 338 5V WILL HAVE 5V PUSHBUTTON LIGHTING NTERLOCK note Z 7 USE INTERLOCK ONLY IF EXTERNAL RELAYS ARE TO BE ADDED NTERLOCK JUMPER MUST BE OPENED INSIDE UNIT ON RELAY BOARD 1 8 PIN 27 IS ALSO USED FOR OTHER GROUNDS POWER GND FIGURE 3 6 WIRING DIAGRAM MD41 328 338 328 5V 338 5V KLN 90B 28V REV 4 Jan 09 1997 15 SECTION 4 POST INSTALLATION CHECKOUT 4 1 PRE INSTALLATION TESTS With the MD41 disconnected turn on the avionics master switch and verify that aircraft power is on pin 12 for 14VDC systems and pin 13 for 28V DC systems Using an ohm meter verify pin 25 is aircraft ground 4 2 OPERATING INSTRUCTIONS Turn off the avionics master switch and connect the mating connector to the MD41 Turn on the avionics master switch and the MD41 should come on with the following annunciations 1 NAV or GPS
8. FOR PANEL MOUNTING REV 4 Jan 09 1997 12 nav Y arm oss f msa GPS ACTV LEG WPT JLAMP NAV GPS OBS GPS NAV TEST CONTROL x GPS APR LEG GPS NAV CONTROL vzr FIGURE 3 4 OUTLINE DRAWING REV 4 Jan 09 1997 13 14VDC DIM TO DIM BUS for pushbutton lighting DIM LOW 14VDC AIRC PWR a TO MD41 CIRCUIT BREAKER POWER GND AUTOPILOT ILS ENERGIZE to autopilot ILS ENERGIZE FROM NAV RECEIVER for autopilot localizer engage TO NAV CIRCUIT BREAKER for fault monitoring C7 NC7 1 NO7 c8 NC8 NO8 SOB ILS ENERGIZE FROM NAV RECEIVER note 1 8 ACTV 9 CONTROL F O 15 11 ANN 14 24 APPR ARM SELECT 30 116 APRR ARM iiz 17 GPS DISPLAYED 1 LEFTA A RIGHT4 U c A H U 31 F DF note 7 G N 25 bi 37 i U I CDI D BAR LEFT A D BAR RIGHT U ROTOR C A ROTOR H U lg A U NAV CONVERTER NAV D BAR LEFT ce DJ NAv D BAR RIGHT U NAV ROTOR C A ROTOR H U STATOR F f TJ 6 D A E i NOTES 1 CONNECT ONLY IF 3 S TO BE FORCED TO NAV MODE WHEN ILS IS SELECTED 2 RELAYS IN NORMALLY CLOSED POSITION WITH NAV SELECTED 3 REFER TO BENDIX KING INSTALLATION MANUAL FOR ACTUAL NSTALLATION 4 RELAYS C1 C2 C3 C4 C5 C7
9. LN 90B installation manual for the remaining system tests No periodic maintenance or calibration is necessary for continued airworthiness of the MD41 REV 4 Jan 09 1997 16 ENVIRONMENTAL QUALIFICATION FORM RTCA DO160C NOMENCLATURE MD41 GPS ANNUNCIATION CONTROL UNIT MODEL NO MD41 TSO NO C129 CLASS Al MANUFACTURER TEST SPECIFICATION MPS 7015613 MANUFACTURER MID CONTINENT INSTRUMENT CO INC 9400 E 34 WICHITA KS 67226 PHONE 316 630 0101 Temperature and Altitude 4 0 Equipment tested to Categories Al amp F2 except as noted Low Temperature 4 5 1 High Temperature 4 5 2 amp 4 5 3 In Flight Loss of Cooling 4 5 4 Cooling air not required Altitude 4 6 1 Decompression 4 6 2 Overpressure 4 6 3 Not Tested Shock Equipment tested per DO 160C Operational Par 7 2 1 Crash Safety Vibration Equipment tested without shockmounts to Categories M and N Table 8 1 ca CE Equipment identified as Category X no test required Equipment identified as Category X no test required Fluids Susceptibility Equipment identified as Category X no test required REV 4 Jan 09 1997 17 Environmental Qualification cont Conditions Sand and Dust Fungus Salt Spray Magnetic Effect Power Input Voltage Spike Audio Frequency Susceptibilit Induced Signal Susceptibility Radio Frequency Susceptibility Radio Frequency Emissions Lightning Induced Transient Susceptibility Lightning Direct Effects REV 4 J
10. MID CONTINENT INSTRUMENTS INSTALLATION MANUAL AND OPERATING INSTRUCTIONS MD41 Series GPS ANNUNCIATION CONTROL UNIT FOR ALLIED SIGNAL KLN 90B MD41 328 28vde Horizontal Mount MD41 338 28vde Vertical Mount shown on page 13 MD41 324 14vde Horizontal Mount MD41 334 14vde Vertical Mount shown on page 13 MID CONTINENT INST CO INC MANUAL NUMBER 7016074 MANUAL REVISION AND HISTORY MANUAL MD41 324 334 328 338 REVISION OCT 25 1995 Rev I MANUAL NUMBER 7016074 This revision level of this manual consist of the following changes Add MD41 334 338 vertical mount versions REVISION NOV 06 1995 Rev 2 Add MD41 328 5V 338 5V These part numbers have 5 volt push button lighting REVISION JAN 24 1996 Rev 3 Added GPS annunciation interlock REVISION JAN 09 1997 Rev 4 Revised DO160C section 4 0 environmental test data Test D1 is now F2 REV 4 Jan 09 1997 SECTION 1 1 1 1 2 1 2 1 1 22 1 2 3 1 2 4 1 2 4 1 1 2 4 2 1 2 5 1 2 6 1 2 7 SECTION 2 2 1 22 2 3 2 4 29 SECTION 3 3 1 3 2 3 3 3 4 SECTION 4 4 1 4 2 FIGURE NO 3 1 3 2 3 3 3 4 3 5 3 6 REV 4 Jan 09 1997 TABLE OF CONTENTS GENERAL DESCRIPTION INTRODUCTION SPECIFICATIONS TECHNICAL PHYSICAL CHARACTERISTICS ENVIRONMENTAL CHARACTERISTICS SPECIFICATIONS ELECTRICAL FRONT PANEL CONTROLS AND ANNUNCIATIONS CONTROLS ANNUNCIATIONS INTERFACE EQUIPMENT LIMITATIONS MAJOR COMPONENTS INSTALLATION CONSIDERA
11. TIONS COOLING EQUIPMENT LOCATION ADDITIONAL ANNUNCIATIONS ADDITIONAL RELAYS ROUTING OF CABLES INSTALLATION PROCEDURE GENERAL INFORMATION UNPACKING AND INSPECTING MOUNTING THE MD41 INSTALLATION LIMITATIONS POST INSTALLATION CHECKOUT PRE INSTALLATION TEST OPERATING INSTRUCTIONS LIST OF ILLUSTRATIONS SCHEMATIC PINOUT 25 PIN DSUB SCHEMATIC PINOUT 50 PIN DSUB CUTOUT DIMENSION FOR PANEL MOUNTING OUTLINE DRAWING WIRING DIAGRAM MD41 324 334 14V WIRING DIAGRAM MD41 328 338 328 5V 338 5V 28V APPENDIX ENVIRONMENTAL QUALIFICATION FORM SECTION 1 GENERAL DESCRIPTION 1 1 INTRODUCTION The MD41 is a self contained GPS Annunciation and Control unit It combines all the necessary functions required for switching HSI CDI data inputs between a conventional NAV VOR receiver and the Allied Signal KLN 90B approach certified GPS receiver In addition the MD41 contains several GPS status annunciations used to indicate modes selected by the front panel switches and various inputs from the GPS receiver A special ILS override feature has been incorporated to cause the MD41 to automatically switch to the NAV mode when the NAV VOR receiver is tuned to an ILS frequency Other features include dual 16 000 hour lamps used for all annunciations internally lighted selection switches automatic photocell dimming and built in annunciation self test A external annunciation dimming adjustment is provided for balancing low
12. an 09 1997 Description of Conducted Tests Bid arani or pre ia e Mamma ee a ee eee TT oci ie pr Equipment tested to Category Z Equipment identified as Category X no tests required DE Equipment identified as Category X no tests required Equipment identified as Category X no test required 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 20 0 21 0 23 0 4 0 18
13. ed by the Administrator The MD41 324 328 334 338 328 5V 338 5V is TSO D and certified for use with the Bendix King KLN 90B system Any attempts to install the MD41 324 328 334 338 328 5V 338 5V in an installation other than the Bendix King KLN 90B is prohibited This will void the TSO NOTE Anytime the MD41 is disconnected or removed from the aircraft the HSI CDI will be inoperative in both NAV VOR and GPS 1 2 7 MAJOR COMPONENTS The system is comprised of one major component the MD41 GPS Annunciation Control Unit REV 4 Jan 09 1997 7 SECTION 2 INSTALLATION CONSIDERATIONS 2 1 COOLING No direct cooling is required As with any electronic equipment overall reliability may be increased if the MD41 is not located near any high heat source or crowded next to other equipment Means of providing a gentle air flow will be a plus 2 2 EQUIPMENT LOCATION The MD41 must be mounted as close to the pilot s field of view as possible The preferable location is near the HSI CDI that will be displaying the GPS information The unit depth with connector attached must also be taken into consideration A MD156 adapter plate is available for front mounting 2 3 ADDITIONAL ANNUNCIATIONS Depending upon the installation and approving agency you may be required to provide additional NAV Source Select external annunciators near the HSI CDI Spare relay contacts on the MD41 J1 or J2 connector may be used for this purpo
14. ogic low from the GPS receiver when a transition is made from arm to active Receives a logic low from the NAV VOR receiver when tuned to an ILS frequency This will force the MD41 into NAV mode regardless of the NAV GPS selection This connection is optional Provides an ILS ground to the autopilot computer This AP ILS energize will follow the MD41 NAV GPS selection When in GPS mode a ground will appear on J1 pin 3 when ACTV is annunciated Receives an ILS energize input from the NAV VOR receiver This will provide an ILS energize output to J1 pin 3 when NAV is selected on the MD41 A logic low will cause the appropriate annunciation to illuminate GPS receiver must be able to accept 100ma Provides a ground to the GPS receiver when NAV is selected on the MD41 1 2 6 EQUIPMENT LIMITATIONS The MD41 series control units contain specific dash numbers to be used with various GPS receivers The installer must match the correct controller part number with the GPS receiver being installed The conditions and tests required for TSO approval of this article are minimum performance standards It is the responsibility of those desiring to install this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO standards The article may be installed only if further evaluation by the applicant documents an acceptable installation and is approv
15. se 2 4 ADDITIONAL RELAYS The MDAI contains 19 relay poles Some installations may require more than 19 poles due to data lines superflags etc If this should occur you may use one spare relay pole to switch additional relays In cases where it may be more desirable to have all the relay switching done at a remote location i e remote mounted equipment one relay pole on the MD41 may be used for switching this bank of relays Please note that the maximum relay contact rating for the MD41 is 2 amps DC 2 5 ROUTING OF CABLES Care must be taken not to bundle the MD41 logic and low level signal lines with any high energy sources Examples of these sources include 400 HZ AC Comm DME HF and transponder transmitter coax Always use shielded wire when shown on the installation print Avoid sharp bends in cabling and routing near aircraft control cables REV 4 Jan 09 1997 8 SECTION 3 INSTALLATION PROCEDURES 3 1 GENERAL INFORMATION This section contains interconnect diagrams mounting dimensions and other information pertaining to the installation of the MD41 After installation of cabling and before installation of the equipment ensure that power is applied only to the pins specified in the interconnect diagram 3 2 UNPACKING AND INSPECTING EQUIPMENT When unpacking equipment make a visual inspection for evidence of damage incurred during shipment The following parts should be included ja MD41 324 14V or MD
Download Pdf Manuals
Related Search