Sandia Aerospace SAE 5-35 Installation Manual
SAE5-35
Altitude Data System
Installation Manual
SANDIA aerospace, Inc.SANDIA aerospace, Inc.
SANDIA aerospace, Inc.
SANDIA aerospace, Inc.SANDIA aerospace, Inc.
3700 Osuna Rd. NE, Suite 711
Albuquerque, NM 87109
305186-00
Rev . 3
This document and the information contained herein is the proprietary data of SANDIA aerospace,
Inc. No part of this document may be transmitted, reproduced, or copied in any form or by any
means without the prior written consent of SANDIA aerospace, Inc. Due to SANDIA aerospace’s
continued product and quality improvement programs, information contained in this document is
subject to change without prior notice.
Copyright 2000 SANDIA aerospace, Inc., All rights reserved. Printed in USA
Record of Revisions
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Table Of Contents
Record of Revisions.............................................................................................................. 1
T able of Contents................................................................................................................ 2
List of Illustrations.............................................................................................................. 2
Section 1 - General Description.......................................................................................... 3
1.1 Introduction............................................................................................................ 3
1.1.1 Product Description ....................................................................................... 3
1.2 T echnical Characteristics ........................................................................................ 3
1.2.1 Physical Characteristics ................................................................................ 3
1.2.2 Operational Characteristics .......................................................................... 3
1.2.3 Gillham Grey Code Output........................................................................... 4
1.2.4 AIM Outputs ................................................................................................ 4
1.2.5 Discrete Inputs ............................................................................................. 4
1.2.6 RS-232 Outputs............................................................................................ 4
1.2.6.1 Standard Mode ..................................................................................... 4
1.2.6.2 Extended Mode..................................................................................... 5
1.2.7 Certification ................................................................................................... 5
Environmental Qualification Form...................................................................................... 6
Section 2 - Installation Considerations ............................................................................... 7
2.1 Introduction............................................................................................................ 7
2.2 Mounting Considerations ....................................................................................... 7
2.3 Cooling ................................................................................................................... 7
Section 3 - Installation Procedures ..................................................................................... 8
3.1 General ................................................................................................................... 8
3.2 Equipment Required............................................................................................... 8
3.2.1 Equipment Supplied....................................................................................... 8
3.2.2 Equipment Not Supplied .................................................................................. 8
3.2.3 AIM Annuciator............................................................................................... 8
3.3 Mounting Tray Installation......................................................................................... 8
3.4 Static Port Connection ........................................................................................... 9
3.5 Electrical Installation .............................................................................................. 9
3.6 Calibration ............................................................................................................ 14
3.6.1 Equipment Required .................................................................................... 14
3.6.2 Calibration Procedures................................................................................. 15
3.6.3 Placarding .................................................................................................... 16
3.7 Continued Airworthiness...................................................................................... 16
List Of Illustrations
Figure 3-1 SAE5-35 Outline Dimensions (with tray) ...................................................... 9
Figure 3-2 J4/J5 Connector W iring ............................................................................... 11
Figure 3-3 J4/J5 Connector Hood Assembly................................................................. 11
Figure 3-4 J4 Pinout ...................................................................................................... 12
Figure 3-5 J5 Pinout ...................................................................................................... 12
Figure 3-6 Interconnect T o Popular Transponders........................................................ 13
Figure 3-7 Interconnect to Garmin & UPSAT GPS and MX20 .................................... 14
Figure 3-8 SAE5-35 Adjustment................................................................................... 16
Figure 3-9 Gillham Grey Code Chart .......................................................................17-19
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Section 1 General Description
1.1 INTRODUCTION
This manual describes the installation of the SANDIA aerospace SAE5-35 Altitude Data System. It
is intended for use by FAA certified repair stations to install the SAE5-35 Altitude Data System and
includes both the mechanical and electrical installation information for the SAE5-35. Calibration and
checkout procedures are included. The installer should insure that all functions are operating according to their intended purpose in their particular installation.
1.1.1 Product Description
The SAE5-35 is a solid state -1000 to 35,000 foot altitude data system that converts pressure altitude
into a digital output as set forth in the International Standard for SSR Pressure Altitude Transmis-
sion. The data output of the SAE5-35 is referenced to 29.92 inch HG (1013 Millibars). The SAE535 has been designed to provide altitude data to GPS and Terrain Awareness Systems in addition to
Mode C Transponders. The SAE5-35 outputs Gillham Grey Code to the transponder and two independent RS232 digital outputs that can be used by GPS or other systems requiring this format.
Additionally , the SAE5-35 includes SANDIA aerospace’s exclusive Altitude In-flight Monitoring
(AIM) feature. With the addition of an optional panel mounted switch and annunciator the AIM
mode will monitor and advise the pilot if the aircraft deviates from a selected altitude.
1.2 TECHNICAL CHARACTERISTICS
1.2.1 Physical Characteristics
Width: 4.87” (5.11” with mounting tray)
Height: 1.06” (1.57” with mounting tray)
Depth: 4.74” (4.80” with mounting tray)
Weight: 0.7 lbs. (.86 lbs. with mounting tray)
1.2.2 Operational Characteristics
Operating T emp. -20o C to + 55o C
Altitude: 35,000 feet
Voltage: 11 - 32 Vdc
Current 1.0 amps maximum with heater on
Accuracy: +/- 50 feet Typical
Resolution: Grey Code 100’
Burst Pressure 90 in Hg
Maximum Rate of Altitude Change: 12,000 Feet/Minute
<100 mA quiescent
RS232 10’
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1.2.3 Gillham Grey Code Outputs
a. 10 Bits available: D4, A4, A2, A1, B4, B2, B1, C4, C2, C1
b. Bit On Impedance: Less than 5 ohms
c. Bit Off Leakage: Less than 10uA
d. Maximum Current per bit: 20 mA
e. Minimum working current: 10 uA
f. Maximum voltage per bit: 50V
g. Minimum working voltage: 5V
h. Bit update rate: Less than 250 mS
i. Minimum strobe switching bandwidth: Greater than 10kHz
1.2.4 AIM Outputs
Maximum Lamp Current: 80 mA
Maximum off Voltage: 50V
1.2.5 Discrete Inputs
AIM SET, Strobe and RS232 Mode Select Inputs
Asserted: < 0.4 Vdc
Not Asserted: > 1.7 Vdc
Pull-up current: 150 uA
1.2.6 RS-232 Outputs
There are two modes of operation for the RS232 outputs. The Data Mode pin, J5 pin 4 selects the
data formats.
1.2.6.1 Standard Mode
When the Mode pin (J5 pin 4) is open:
a. Baud: 9600
b. Data bits: 8
c. Stop bit: 1
d. Parity: None
e. Output rate: 1 +/- .2 seconds
f. Message length: 1 1 bytes
g. Altitude resolution: 10 foot
h. W orks with Garmin and T rimble GPS
4 305186-00
1.2.6.2 Extended Mode
When the Mode pin (J5 pin 4) is grounded:
a. Baud: 1200
b. Data bits: 8
c. Stop bit: 1
d. Parity: None
e. Output rate: 1 +/- .2 seconds
f. Message length: 17 bytes
g. Altitude resolution: 10 foot
h. Temperature resolution: 1 degree C
i. For use with UPSAT MX20 and GPS receivers
1.2.7 Certification
TSO: C88a
Software: DO-178B Level C
Environmental: DO-160D(C1)CAA[(SM)(UF)]XXXXXXZBBBBTBXXXX
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