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Mid-Continent Instruments and Avionics 
Revision A, July 10, 2014 

 

Manual Number 9018205 

 

SECTION 2  PRE-INSTALLATION 

2.1 

COOLING

 

The MD93 will become warm when in use; however no external cooling is required. This is normal and 
within operational parameters. No special mounting considerations are required, although mounting to a 
metal surface can help dissipate any heat generated and extend the life of the product. 

2.2 

EQUIPMENT LOCATION 

The MD93 Digital Clock / Dual USB Charging Port is designed for a circular rear panel mount 
configuration, allowing for installation in a cockpit or cabin. Clearance should be provided for the input 
mating connector which may require an additional inch of clearance beyond the rear of the unit. 

2.3 

ROUTING OF CABLES 

Avoid sharp bends in cabling and routing near aircraft control cables. Avoid close proximity and contact 
with aircraft structures, avionics equipment or other obstructions that could chafe wires during flight and 
cause undesirable effects. 

 

 

 

Summary of Contents for MD93 Series

Page 1: ... Digital Clock USB Charger Mid Continent Instruments and Avionics Mid Continent Instrument Co Inc dba Mid Continent Instruments and Avionics 9400 E 34th Street N Wichita KS 67226 USA Manual Number 9018205 PH 316 630 0101 FX 316 630 0723 Revision A July 15 2014 ...

Page 2: ... has been made to keep it free of errors some may occur When reporting a specific problem please describe it briefly and include the manual part number the paragraph figure table reference and the page number Send your comments to Mid Continent Instruments and Avionics Attn Technical Publications 9400 E 34th Street N Wichita KS 67226 USA PH 316 630 0101 FX 316 630 0723 ks customerservice mcico com...

Page 3: ...REVISION HISTORY ECO Revision Date Detail A 07 15 2014 Initial release ...

Page 4: ...S 7 SECTION 2 PRE INSTALLATION 8 2 1 COOLING 8 2 2 EQUIPMENT LOCATION 8 2 3 ROUTING OF CABLES 8 SECTION 3 INSTALLATION 9 3 1 GENERAL 9 3 2 PRE INSTALLATION INSPECTION 9 3 3 PARTS 9 3 3 1 INCLUDED PARTS 9 3 3 2 OPTIONAL AVAILABLE PARTS 9 3 3 3 INSTALLER SUPPLIED PARTS 9 3 4 CABLE HARNESS 10 3 4 1 WIRE GAUGE SELECTION 10 3 4 2 PIN ASSIGNMENT INFORMATION 10 3 4 3 HARNESS VERIFICATION 10 3 5 INSTALLAT...

Page 5: ...N 12 4 3 3 LOW INPUT VOLTAGE SHUTDOWN 12 4 3 4 OVER TEMPERATURE 12 SECTION 5 CLOCK CHRONOMETER OPERATION 13 5 1 DESCRIPTION 13 5 2 CONSTRUCTION 13 5 3 OPERATIONAL MODES 13 5 3 1 LOCAL TIME OPERATION SETTING 14 5 3 2 UNIVERSAL TIME OPERATION SETTING 15 5 3 3 FLIGHT TIMER 16 5 3 4 ELAPSED TIMER 17 5 3 5 DISPLAY TEST MODE 18 SECTION 6 CONFORMANCE 18 6 1 INSTRUCTIONS FOR CONTINUED AIR WORTHINESS 18 ...

Page 6: ...nce Plan Early generation or smaller consumer electronics typically accept one 1 0 amp during charging However newer electronics such as tablets and larger devices can accept and in some cases require up to 2 1 amps to charge and operate As a high power DCP the MD93 can provide up to 2 1 amps to charge any USB device including the higher demand products Unlike most dual USB chargers which provide ...

Page 7: ...when aircraft power is removed 1 4 TECHNICAL SPECIFICATIONS 1 4 1 Electrical Attributes Input Voltage 10 32 VDC Input Power 31 watts max 2 2 amps 14 VDC 1 1 amps 28 VDC Output Voltage 5 VDC 0 25 VDC per USB port Output Power 2 1 amps max per USB port Efficiency 85 nominal Clock Accuracy Less than 1 0 seconds per 24 hour period Table 1 Electrical Attributes 1 4 2 Physical Attributes Weight 0 25 pou...

Page 8: ... life of the product 2 2 EQUIPMENT LOCATION The MD93 Digital Clock Dual USB Charging Port is designed for a circular rear panel mount configuration allowing for installation in a cockpit or cabin Clearance should be provided for the input mating connector which may require an additional inch of clearance beyond the rear of the unit 2 3 ROUTING OF CABLES Avoid sharp bends in cabling and routing nea...

Page 9: ...TION When unpacking this equipment make a visual inspection for evidence of any damage that may have occurred during shipment 3 3 PARTS 3 3 1 Included Parts The following parts are included Digital Clock Dual USB Charging Port MCIA P N 6420093 Installation Manual MCIA P N 9018205 Installation Kit MCIA P N 9018178 o Mating Connector 4 pin o Pins 6 4 required 2 spares o Screws 5 6 32 x 3 8 Flat Head...

Page 10: ...2800 obsolete or 11 01 0200 obsolete See the Molex Hand Crimp Tool User Manual for crimp procedures 3 4 2 Pin Assignment Information See Table 4 for pinout definition and Figure 2 for pin locations Pin Number Signal 1 Aircraft Power 2 Ground 3 Aircraft Lighting Bus 4 Flight Timer Input Table 4 Figure 2 Power Input Connector Pinout MD93 Rear View 3 4 3 Harness Verification WARNING Failure to instal...

Page 11: ...t A voltage equal to the aircraft bus voltage 100 corresponds to maximum brightness If the lighting voltage is less than 10 of the power input voltage dimming will be automatically controlled by the ambient light sensed by the photocell built into the unit To adjust the brightness range of the clock for optimal daytime and night time viewing as well as balance amongst other panel instruments use t...

Page 12: ...f surviving a short circuit event without permanent damage The unit enters an over current condition so that the average current is significantly reduced and the device is protected 4 3 2 Over Current Protection The MD93 monitors current draw individually on each port During an over current condition the output is turned off until the over current condition is removed Once the overcurrent conditio...

Page 13: ...er is removed for well over ten years 5 3 OPERATIONAL MODES The MD93 modes of operation for clock functions are in order local time universal time flight timer and elapsed timer Note When the clock is in local time function there are no annunciations to indicate as this is the default mode of operation The mode button MODE is used to alternate between four different operational modes specifically ...

Page 14: ...ements increments hours Current time is displayed Pressing the buttons have no function HOURS Set MINUTES Set 12 24 HR Select Time is displayed with minutes flashing Pressing the buttons decrements increments minutes Note Setting local time minutes also sets universal time minutes Displays current mode 12 flashing or 24 flashing in seconds location Hr shown in minutes location Pressing either or b...

Page 15: ...ed UTC is annunciated Pressing the buttons have no function HOURS Set MINUTES Set Time is displayed with minutes flashing Pressing the buttons decrements increments minutes Note Setting universal time minutes also sets local time minutes Press Hold MODE for 2 sec Press MODE Press MODE SECONDS Display Displays current mode SEC on seconds on or SECoFF seconds off Pressing either or buttons toggles b...

Page 16: ...d on the MD93 The default flight timer shown normally in FLIGHT mode is a resettable timer Pressing and holding either or button will display the non resettable flight timer Upon releasing the or button the resettable flight timer will be displayed For more detailed operation of flight timer refer to Figure 11 below Figure 9 Flight Timer Mode RESETTABLE FLIGHT TIMER Flight timer is displayed in te...

Page 17: ...p the timer Pressing the button resets the timer If the timer is counting and the button is pressed the timer will reset to zero and begin counting immediately Note If the timer is active the user can change modes e g to local time and timer will still remain active but only when power is maintained to the clock For detailed timer operation refer to Figure 13 Figure 11 Elapsed Timer Mode TIMER RUN...

Page 18: ... all annunciators shall be activated until the buttons are released Figure 13 Test Mode SECTION 6 CONFORMANCE 6 1 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS No periodic scheduled maintenance or calibration is necessary for continued airworthiness of the MD93 Digital Clock Dual USB Charging Port If the unit fails to perform to specifications the unit must be removed and serviced by Mid Continent Inst...

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