Print Friendly, PDF & Email

MIL-STD-1553 Classes

MIL-STD-1553 Classes: A data bus is a system within a computer or device, consisting of a connector or set of wires that provides transportation for data. A serial data bus allows multiple microprocessors to easily communicate with each other over a common pair of wires using a scheme similar to a telephone party line.

The MIL-STD-1553 standard describes the method of communication and the electrical interface requirements for subsystems connected to the data bus. The 1 Mbps serial communication bus is used to achieve aircraft avionic (MIL-STD-1553B) and stores management (MIL-STD-1760B) integration.

The 1553 standard is organized similar to most military standards with a foreword, scope, referenced document section, definitions, general requirements, the appendix and a tri-service Notice 2.

Some of the key MIL-STD-1553 elements are the bus controller, the embedded remote terminal (a sensor or subsystem that provides its own internal 1553 interface), the stand-alone remote terminal, bus monitor, and two other devices that are part of the 1553 integration; the twisted shielded pair wire data bus and the isolation couplers that are optional.

The physical layer looks something like this:

A single bus consists of a wire pair with 70–85 Ω impedance at 1 MHz Where a circular connector is used, its center pin is used for the high (positive) Manchester bi-phase signal.

Transmitters and receivers couple to the bus via isolation transformers, and stub connections branch off using a pair of isolation resistors and, optionally, a coupling transformer. This purpose of this is to reduce the impact of a short circuit and ensure that the bus does not conduct current through the aircraft.

A Manchester code is used to present both clock and data on the same wire pair and to eliminate any DC component in the signal (which cannot pass the transformers). The bit rate is 1.0 megabit per second. The combined accuracy and long-term stability of the bit rate is only specified to be within ±0.1%; the short-term clock stability must be within ±0.01%. The peak-to-peak output voltage of a transmitter is 18–27 V.

The bus is often made dual or triply redundant by using several independent wire pairs, and then all devices are connected to all buses. There is provision to designate a new bus control computer in the event of a failure by the current master controller.

Usually, the auxiliary flight control computer(s) monitor the master computer and aircraft sensors via the main data bus. A different version of the bus uses optical fiber, which weighs less and has better resistance to electromagnetic interference, including EMP. This is known as MIL-STD-1773. The “AS 1773” implementation has a dual rate of 1 Mbit/s or 20 Mbit/s.

MIL-STD-1553 Training Program

Tonex offers MIL 1553 Crash Course, a 3-day crash course covering MIL-1553 covering MIL-STD-1553 key concepts as a communication bus, MIL-STD-1553 implementation, MIL-1553 tools, MIL-STD-1553 verification and validation, MIL-STD-1553 cyber security and a survey of MIL-STD-1553 capable systems.

Who Should Attend

Project managers, avionics system engineers, Electronic warfare engineers, hardware and software engineers, or anyone else who wants to learn about MIL-STD-1553.

Related Course

MIL-1553 Training | MIL-STD-1553 Training, a 2-day course that covers key MIL-STD-1553 principles, features, protocol architecture, functional characteristics, technical components, design, operations, products, testing, cybersecurity and trends.

Why Tonex?

–Reasonably priced classes taught by the best trainers is the reason all kinds of organizations from Fortune 500 companies to government’s most important agencies return for updates in courses and hands-on workshops

–Excellent instructors with real life experience in their topics of specialization.

–We’re different because we take into account your workforce’s special learning requirements. In other words, we personalize our training – Tonex has never been and will never be a “one size fits all” learning program.

–Reasonably priced classes taught by the best trainers is the reason all kinds of organizations from Fortune 500 companies to government’s most important agencies return for updates in courses and hands-on workshops

–Ratings tabulated from student feedback post-course evaluations show an amazing 98 percent satisfaction score.

For more information, questions, comments, Contact us.

 

 

 

Request More Information

  • Please complete the following form and a Tonex Training Specialist will contact you as soon as is possible.

    * Indicates required fields

  • This field is for validation purposes and should be left unchanged.