L3Harris Commercial Aviation Solutions (CAS) is now known as Acron Aviation.

GH-3900RSU Electronic Standby Instrument System (ESIS)

The GH-3900RSU (Remote Sensor Unit) houses rate/level sensors, air data transducers and optional accelerometers, delivers attitude, altitude, airspeed and navigation data to the high-resolution wide-screen DU-42 display for business, regional, commercial aircraft and helicopters.

The Acron Aviation GH-3900RSU Electronic Standby Instrument System
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Product overview

At only 1.5 inches deep, the Acron Aviation GH-3900RSU™ Electronic Standby Instrument System (ESIS) is the thinnest and widest electronic standby instrument available for business, regional and commercial aircraft and helicopters. Highlighting the system’s design is a Remote Sensor Unit (RSU) which enables the 4.2-inch (diagonal) landscape display to be installed virtually anywhere on the panel. The GH-3900RSU ESIS is designed to meet the needs of Part 23 (Class III & IV), Part 25 aircraft and Part 27/29 rotorcraft.

Key features

Two pieces, one flexible solution

The two-piece design of the GH-3900RSU gives aircraft designers and avionics installers the greatest possible flexibility when it comes to its location. Utilizing a two-part system design that separates the display from the sensor array, the 1.5-inch-deep unit can be installed almost anywhere behind the aircraft's panel.

The GH-3900RSU, which houses rate/level sensors, air data transducers and optional accelerometers delivers attitude, altitude, airspeed and navigation data to the display, ensuring pilots will have the critical information they need in case of main instrument system failures. Heading data is also available using an ARINC 429 source or the Acron Aviation MAG-3000 magnetometer.

User defined display configurations

The GH-3900RSU allows the avionics installer to easily define data I/O interface, Static Source Error Correction (SSEC) and Velocity Maximum Operation (VMO) values, along with customizing the display parameters to meet individual requirements.

Product specifications

DU-42 Display

Dimensions (L x W x H)

  • 1.50 in. x 5.25 in. x 3.00 in.
  • (38 mm x 133 mm x 76 mm)
  • Excluding knob and connector

Weight and power

  • 1.5 lb. max (0.68 kg)
  • +28 VDC, nominal

Interfaces

  • ARINC 429 Inputs (3) and Output (1)
  • USB Serial Bus (1)
  • RS-232 Serial Bus (1)
  • I2C Serial Bus (1)
  • Analog Input (1)

Certifications

  • TSO-C2d, C3e, C4c, C6e, C8e, C10b, C34e, C35d, C36e, C40c, C46a, C66c, C95a, C106, C113a

Software/hardware

  • DO-178B Level B / DO-254 Level B

GH3900RSU

Dimensions (L x W x H)

  • 8.32 in. x 3.19 in. x 3.35 in.
  • (211 mm x 81 mm x 85 mm)
  • Excluding knob and connector

Weight and power

  • 3 lb. max (1.36 kg)
  • +28 VDC, nominal

Interfaces

  • ARINC 429 Inputs (7) and Outputs (3)
  • RS-422 Serial Bus (1)
  • RS-232 Serial Bus (1)
  • Discrete Inputs (6) and Outputs (2)
  • Analog Inputs (2)
  • Pneumatic Pressure Ports

Certifications

  • TSO-C2d, C3e, C4c, C6e, C8e, C10b, C46a, C95a, C106

Software/hardware

  • DO-178B Level A / DO-254 Level A

Downloads

Customer support

Aircraft on ground: Immediate support

We have a global network of support centers to support customers with aircraft on the ground issues.

Technical pubs, repairs and spares

For the latest technical publications and contact details for our repairs and spares depots.

Related services

SkyParts Global offers direct access to high quality, OEM-reliable parts and out-of-production aerospace equipment as Used Serviceable Material. We also have hundreds of global dealers selling avionics for business and general aviation platforms, as well as helicopters. Our authorized network is committed to providing the absolute best product sales support.

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