MIL-1760 Training Classes | Systems Engineering
MIL-STD-1760, the Department of Defense Interface Standard for Aircraft/Store Electrical (and Optical) Interconnection System, defines a standard interface for conventional aircraft stores.
There are many working parts such as an interface bridge. A military standard-1760 interface bridge can include a housing, a translator device and an energy storage device. The housing can include a MIL-STD-1760 connector on a first end and a weapon side connector on a second end.
The translator device can translate a MIL-STD-1553B remote terminal (RT) protocol to a weapon side signaling protocol and translate the weapon side signaling protocol to the MIL-STD-1553B RT protocol. The energy storage device can be coupled to the operating power of the MIL-STD-1760 connector and can be configured to provide power to the translator device for a duration after the power from the MIL-STD-1760 connector is disconnected.
The protocols defined by the High Speed Network for MIL-STD-1760 have been incorporated into three weapons interface standards:
1. For MIL-STD-1760E, MIL-STD-1553 is a required interface, with the Class I option also providing SAE AS5653
2. For SAE AS5725, MMSI (Miniature Munitions Store Interface) Rev. D, EBR-1553 is a required interface, with the Class I option also providing AS5653
3. AS5653 is the only interface defined for SAE draft standard AS5726, the Interface for Micro Munitions, or IMM. This standard is expected to be published in 2009. IMM, which is intended for use on small weapons (under 50 pounds) and for UAVs, specifies the provision of 28V or 56V power over Fibre Channel, which enables the use of a small, 7-pin connector.
The Fibre Channel physical layer for MIL-STD-1760E is defined by SAE AS5653. This specifies the use of 75 coax cable, and a transmitter voltage range of 2.0 to 3.0 volts peak-to-peak, through the “High Bandwidth" HB2 and HB4 locations in the MILSTD-1760E connector. This voltage range is higher than the standard Fibre Channel range of 1.1 to 2.0 volts.
Another protocol incorporated into High-Speed 1760 is FFI, or Fast Fabric Initialization. FFI provides modifications to the standard Fibre Channel protocol for assigning switch addresses over a multi-switch fabric. For a weapons network, this could entail multiple switches, on the aircraft, and/or installed in launchers, racks or weapons. The benefits of FFI for a weapons network include deterministic switch addressing, along with reduced time for initialization and re-initialization following power outages.
Before adoption and widespread use of MIL-STD-1760, new store types were added to aircraft using dissimilar, proprietary interfaces. This greatly complicated the aircraft equipment used to control and monitor the store while it was attached to the aircraft: the stores management system, or SMS.
There are several main groups of MIL-STD-1760 signals such as the MIL-STD-704 power connections that provide the store with access to 28 VDC, three-phase wye 400 Hz, 115/200 VAC and 270 VDC aircraft power. Normally, only one of the last two supplies are routed, however, if both are made available, then they are never made active simultaneously.
Want to know more about MIL-1760? Tonex offers MIL-1760 Training, a 2-day course that covers technical aspects of the electrical interface between a military aircraft and its carriage stores.
Additionally, Tonex offers another 45 courses in Aerospace & Defense Engineering, including:
--Combat Systems Engineering Training (3 days)
--DO-178 Training/DO-178C Training/DO-254 Training (4 days)
--Applied Systems Engineering for Logisticians (3 days)
--Intro to Fiber Optics and Infrared Sensors (3 days)
For more information, questions, comments, contact us.