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Microair Avionics 

EC2002 Altitude Encoder 

16

th

 April 2010 

EC2002 Installation Manual 01R12.doc 

Page  8  of  16 

 

 

 

 

3.2

 

Electrical Requirements 

All  wiring  associated  with  the  EC2002  installation  in  an  aircraft,  should  comply  with  FAA  AC  43.13-1A 
Chapter 11 or equivalent requirements. All wiring should be a minimum 22AWG in size. 

 

Power  may  be  supplied  to  the  EC2002  as  a  switched  supply  from  the  transponder,  or  directly  from  the 
aircraft bus. The EC2002 can operate with a supply voltage ranging from +10V to +33V. The maximum current 
requirement for the EC2002 is 200mA (heater element full on, 24V Supply). 

 

Where the power for the EC2002 is to be supplied from the aircraft bus, the positive line should be switched 
and passed via a circuit breaker with a rating of no greater than 1 A. Both the switch and the circuit breaker 
should  be  clearly  labelled  as  “ALTITUDE  ENCODER”.  A  dedicated  ground  line  should  be  run  from  the 
EC2002 to the transponder, and be grounded to the transponder’s power ground to ensure correct signal levels. 

 
 
 
 

EC2002Pin 

Assignment 

TRANSPONDER PIN ASSIGNMETS 

Microair 

T2000SFL 

King 

KT76A 

Terra 

TRT250 

Narco 

AT-150 

Garmin 

GTX 320 

Collins 

TDR-950 

D4 

21 

 

 

 

 

 

A1 

12 

A2 

10 

17 

10 

A4 

11 

16 

B1 

12 

15 

12 

RS232 In 

 

 

 

 

 

 

RS232 Out 

 

 

 

 

 

V+ 

A/C V+ 

A/C V+ 

18 

14 

A/C V+ 

B2 

13 

10 

11 

10 

B4 

17 

14 

12 

11 

C1 

18 

14 

10 

12 

C4 

20 

18 

13 

13 

C2 

19 

11 

11 

14 

V+ 

A/C V+ 

A/C V+ 

18 

14 

A/C V+ 

15 

GND 

A/C Gnd 

A/C Gnd 

13 

A/C Gnd 

 

Notes 

1.

 

V+ means input voltage, either switched from the transponder or direct from the aircraft bus. 

2.

 

A/C V+ means aircraft supply voltage – positive. 

3.

 

A/C Gnd means aircraft ground – negative. 

4.

 

Where the power is not supplied directly from the transponder, it is recommended that an indicator 
light be installed to show when power is being supplied to the encoder. 

Содержание EC2002

Страница 1: ...Microair Avionics Pty Ltd 601 Curtin Ave E Pinkenba QLD 4008 Australia Tel 61 7 4160 8200 e mail support microair aero...

Страница 2: ...Microair Avionics Pty Ltd CURRENT REVISION STATUS Revision Date Change 1 0 23 09 03 Initial Draft 01R2 18 05 07 Specifications and calibration procedures updated 01R3 28 06 07 Minor amendments 01R4 0...

Страница 3: ...DUCTION 4 1 1 ATSO APPROVAL 4 1 2 RTCA COMPLIANCE 4 2 0 DESCRIPTION 5 3 0 INSTALLATION 6 3 1 PHYSICAL REQUIREMENTS 6 3 2 ELECTRICAL REQUIREMENTS 8 4 0 SERIAL ALTITUDE OUTPUT 9 5 0 FIELD CALIBRATION 11...

Страница 4: ...ecification installation methods and calibration procedures of the EC2002 Altitude Encoder 1 1 ATSO Approval Pending 1 2 RTCA Compliance The EC2002 hardware development is compliant to RTCA DO 254 lev...

Страница 5: ...NPT fitting The transducer output is digitised into a numerical value and outputted as an altitude via the 10 line Gillham interface and simultaneously to the serial data interface The EC2002 will typ...

Страница 6: ...he purpose of mounting Microair recommends that the installer should consider the fact that the encoder may have to be dismounted to allow for recalibration periodically The retaining hardware should...

Страница 7: ...y to remove the top cover and set the serial data output switches for the correct data format and resolution The switch settings have no effect on the Gillham output lines Refer to section 4 0 for for...

Страница 8: ...should be clearly labelled as ALTITUDE ENCODER A dedicated ground line should be run from the EC2002 to the transponder and be grounded to the transponder s power ground to ensure correct signal leve...

Страница 9: ...ude digits T 25 checksum carriage return AL 05200T 25D8 CR Magellan 1200bps MGL sign five altitude digits T 25 checksum carriage return MGL 05200T 250C CR Northstar Garmin 2400bps ALT space five altit...

Страница 10: ...ON Garmin Trimble 25 steps ON OFF ON OFF ON ON Microair 100 steps ON OFF OFF OFF ON OFF Microair 25 steps ON OFF ON OFF ON OFF Microair 10 steps ON ON OFF OFF ON OFF Microair 1 steps ON ON ON OFF ON O...

Страница 11: ...ibration check over any altitude range from 1000 feet to 38 000 feet Where the technician is required to adjust the EC2002 refer to section 5 1 IMPORTANT NOTE To complete the calibration process of th...

Страница 12: ...5 050 and note the transition error Step 4 If the average transition error from steps 2 3 is greater than 25ft use an appropriate blunt tool to press either the HIGH or LOW keys to increase or decreas...

Страница 13: ...Microair Avionics EC2002 Altitude Encoder 16th April 2010 EC2002 Installation Manual 01R12 doc Page 13 of 16 6 0 TECHNICAL DRAWING WEIGHT 95g 3 oz...

Страница 14: ...Microair Avionics EC2002 Altitude Encoder 16th April 2010 EC2002 Installation Manual 01R12 doc Page 14 of 16 7 0 WIRING DIAGRAMS 7 1 Gillham Output 7 2 Serial Output...

Страница 15: ...lures due to abuse misuse accident unauthorised alteration or repairs carried out by parties other than Microair Avionics or an approved Microair Avionics Service Centre This warranty does not cover f...

Страница 16: ...Microair Avionics EC2002 Altitude Encoder 16th April 2010 EC2002 Installation Manual 01R12 doc Page 16 of 16 Supplied by...

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