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INSTALLATION MANUAL AND
OPERATING INSTRUCTIONS
MD41-( ) Series GPS ANNUNCIATION CONTROL UNIT
MD41-1324
MD41-1334
MD41-1328
MD41-1338
Mid-Continent Instruments and Avionics
th
9400 E. 34
Street N., Wichita, KS 67226 USA
Phone 316-630-0101 Fax 316-630-0723
FOR ALLIED SIGNAL KLN 90B
14vdc
14vdc
28vdc
28vdc
Horizontal Mount
Vertical Mount (shown on page 11)
Horizontal Mount
Vertical Mount (shown on page 11)
Manual Number 7019747
REV. 2 Jan 2, 1998
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Summary of Contents for Midcontinent MD41 Serie
- Page 1 INSTALLATION MANUAL AND OPERATING INSTRUCTIONS MD41-( ) Series GPS ANNUNCIATION CONTROL UNIT FOR ALLIED SIGNAL KLN 90B MD41-1324 14vdc Horizontal Mount MD41-1334 14vdc Vertical Mount (shown on page 11) MD41-1328 28vdc Horizontal Mount MD41-1338 28vdc Vertical Mount (shown on page 11) Mid-Continent Instruments and Avionics Manual Number 7019747 9400 E.
- Page 2 MANUAL REVISION AND HISTORY MANUAL: MD41-1324, -1328, -1334, -1338, -1328(5v), -1338(5v) REVISION: 1 Oct. 18, 1997 MANUAL NUMBER: 7019747 This revision level of this manual consist of the following changes: Added AlliedSignal KI 208A/209A Navigation Indicators to be used with the MD41-1300 series ACU in place of the MD41-244/248 series Relay Units.
- Page 3 TABLE OF CONTENTS SECTION 1 GENERAL DESCRIPTION INTRODUCTION SPECIFICATIONS, TECHNICAL 1.2.1 PHYSICAL CHARACTERISTICS 1.2.2 ENVIRONMENTAL CHARACTERISTICS 1.2.3 SPECIFICATIONS, ELECTRICAL 1.2.4 FRONT PANEL CONTROLS AND ANNUNCIATIONS 1.2.4.1 CONTROLS 1.2.4.2 ANNUNCIATIONS 1.2.5 INTERFACE 1.2.6 EQUIPMENT LIMITATIONS 1.2.7 MAJOR COMPONENTS SECTION 2 INSTALLATION CONSIDERATIONS COOLING EQUIPMENT LOCATION ROUTING OF CABLES...
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Page 4: Section 1 General Description
SECTION 1 GENERAL DESCRIPTION INTRODUCTION The MD41-( ) is a compact, self -contained GPS Annunciation and Control unit. It combines all the necessary functions required to interface the Allied Signal KLN 90B approach-certified GPS receiver with the MD41-244/248 remote mounted relay transfer system. - Page 5 1.2.3 SPECIFICATIONS, ELECTRICAL Design All Solid State MD41-1324/1334 (14VDC) 0.40 Amps MD41-1328/1338 (28VDC) 0.30 Amps MD41-1328(5V)/1338(5V) (28DC) 0.30 Amps 1.2.4 FRONT PANEL CONTROLS AND ANNUNCIATIONS 1.2.4.1 CONTROLS NAV/GPS Alternate action switch, when pressed, will select NAV (VOR) GPS presentation on HSI/CDI. GPS/APR Momentary switch, when pressed, will arm GPS Approach Mode.
- Page 6 1.2.5 INTERFACE (cont.) Lamp Test Receives ground from remote test switch J1 Pin 7 to light all annunciations.(optional connection) APR ARM Select Provides a momentary logic low to the J1 Pin 6 GPS receiver when approach arm is selected. APR ARM Receives a logic low from the GPS receiver J1 Pin 4 to annunciate ARM.
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Page 7: Equipment Limitations
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. -
Page 8: Section 2 Installation Considerations
SECTION 2 INSTALLATION CONSIDERATIONS 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. EQUIPMENT LOCATION The MD41-( ) must be mounted as close to the pilot’s field of view as possible. -
Page 9: Section 3 Installation Procedures
SECTION 3 INSTALLATION PROCEDURES 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. - Page 10 REAR VIEW OF J1 (bottom) CONNECTOR PIN NO. 1 ---------------------------- GPS ANNUNCIATION (receives ground from remote transfer relays) 2 ---------------------------- NAV ANNUNCIATION (receives ground from remote transfer relays) 3 ---------------------------- MSG ANNUNCIATION (receives logic low from GPS receiver) 4 ---------------------------- ARM ANNUNCIATION (receives logic low from GPS receiver) 5 ---------------------------- DIMMER IN (from aircraft dimming bus for push-button lighting)
- Page 11 Note 1: Use two 4-40 X 3/8” Flat Head Phillips Screws for Mounting FIGURE 3-2 OUTLINE DRAWING REV. 2 Jan 2, 1998...
- Page 12 FIGURE 3-3 WIRING DIAGRAM, MD41-1324/1334/1328/1338, 1328(5V)/1338(5V), MD41-244/248 for KLN 90B REV. 2 Jan 2, 1998...
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Page 13: Section 4 Post Installation Checkout
SECTION 4 POST INSTALLATION CHECKOUT PRE INSTALLATION TESTS With the MD41-( ) disconnected, turn on the avionics master switch and verify that aircraft power is on pin 13 for. Using an ohm meter, verify pin 25 is aircraft ground. OPERATING INSTRUCTIONS Turn off the avionics master switch and connect the mating connector to the MD41-( ). -
Page 14: Environmental Qualification Form
ENVIRONMENTAL QUALIFICATION FORM RTCA / DO160C NOMENCLATURE: MD41-( ) GPS ANNUNCIATION CONTROL UNIT MODEL NO: MD41-( ) TSO NO: C129 CLASS A1 MANUFACTURER TEST SPECIFICATION: MPS 7015613 MANUFACTURER: Mid-Continent Instruments and Avionics 9400 E. 34 Street N. Wichita, KS 672226 Phone (316) 630-0101 Conditions Section... - Page 15 Environmental Qualification (cont.) Conditions Section Description of Conducted Tests Sand and Dust 12.0 Equipment identified as Category X, no test required Fungus 13.0 Equipment identified as Category X, no test required Salt Spray 14.0 Equipment identified as Category X, no test required Magnetic Effect 15.0 Equipment tested to Class Z...
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