SG102 Attitude Heading Reference System

SG102 Attitude Heading Reference System

The upgraded SG102 Attitude Heading Reference System (AHRS) has an initialization time that is 3X faster and now comes with a selectable low- and high-speed ARINC 429 output, which allows for additional interface option with radar systems, satellite communication antennas, and other avionics.

It is a solid-state three-axis instrument certified for primary heading reference and standby attitude. Pitch and roll information are also provided for the stabilization of other equipment such as weather radar, FLIR cameras, etc.

Designed as a plug-compatible replacement for the BendixKing KG 102, the SG102 is ideally suited as an upgrade for existing BendixKing KCS 55A compass systems. A full set of heading outputs (XYZ, ARINC 429 and RS-232) is also available to allow upgrade of other common directional gyros. Weighing just over two pounds, the SG102 system also includes our sealed magnetic transducer (magnetometer) for stabilized magnetic heading.

Offering a superior approach to inertial reference, the SG102 continues our tradition of innovative, modular solutions that enable you to easily and affordably upgrade your aircraft.

The SG102 is available in three versions depending on the application


  • SG102-000: Fixed-Wing Piston Aircraft
  • SG102-100: Fixed-Wing Turbine Aircraft
  • SG102-200: High-Vibration Version for Helicopters

Product Images

Operational & Functional Benefits

  • Certified for primary heading reference and secondary attitude
  • Solid state, plug-compatible upgrade for the Bendix/King KG102A directional gyro
  • Compatible with all common directional gyro interfaces
  • Pitch and roll output for auxiliary applications requiring stabilization

Documents

Product Support

SG102 & SG102/D Software Version History


Software updates require the use of the SG102 Maintenance Adapter, part number 90230-A.

Note:

Only SG102 units with MOD 2 (serial numbers 11-3100 or higher) and SG102/D units are compatible with software version 1.50 and higher.
Only SG102 units with MOD 1 (serial numbers 11-2501 through 11-3099) are compatible with software versions 1.25 through 1.35.

1.62 – Released 5/15/2015 – SG102 MOD 2 and SG102/D Units Only (Field loadable from version 1.61 only)
  • Improves performance during low-bank turns.
    Corrects the slaving meter output on the SG102 P2 connector for proper indication on King KA 51A/B slaving accessories.
1.61 – Released 9/30/2014 – SG102 MOD 2 and SG102/D Units Only (Not field loadable)
  • Change to production calibration process.
1.35 – Released 9/25/2014 – MOD 1 Units Only
  • Change to internal temperature profile.
1.51 – Released 4/11/2014 – SG102 MOD 2 and SG102/D Units Only
  • Support of SG102/D.
  • Performance enhancements during startup and long term turning.
​1.50 – Released 2/4/2014 – MOD 2 Units Only
  • Support of MOD 2 hardware.
  • Provides selectable high speed ARINC 429.
  • Initialization time reduced to 1 minute nominal.
1.31 – Released 2/16/2011
  • Improved SG102 tolerance to MT102 rotational misalignment in aircraft.
1.30 – Released 11/5/2009
  • Improves performance during and after maneuvers.
1.26 – Released 9/24/2009
  • Supports new calibration procedure.
1.25 – Released 6/26/2009
  • Enhanced performance to support the Reversionary Attitude feature in SN3500/SN4500 units.
  • Supports continuous turns around a point at bank angles above 8 degrees.
  • Supports aerobatic operations up to 150° per second roll rate.
1.10 – Released 10/31/2008
  • Supports MOD 1 SG102 hardware.
1.00 – Released 12/18/2007
  • Initial release.
SIL SG102-11: Software version 1.62 for SG102 with MOD 2 and SG102/D – 5/6/2015
SIL SG102-10: Software version 1.61 for SG102 with MOD 2 and SG102/D – 10/15/2014
SB SG102-08: Software version 1.35 for SG102 with MOD 1 – 9/19/2014
SB MT102-02: Inspection of MT102 – 3/28/2014
SIL MT102-01: Inspection of MT102 – 3/13/2014
  • Superseded by SB MT102-02
SIL SG102-07: MOD 2 Release – 3/6/2014
SIL SG102-06: Software version 1.31 – 2/16/2011
SIL SG102-05: Software version 1.30 – 11/5/2009
SIL SG102-04: Software version 1.26 – 9/24/2009
SIL SG102-03: Software version 1.25 – 6/26/2009
SIL SG102-01: Installation manual correction – 3/6/2008

SG102 Software Update Access