It should come as no surprise that MIL-STD-1553 connectors play a big role in improving signal transfer in data buses used in avionics, aerospace, and military vehicles. But what is it about these connectors that suit them for such rugged, demanding use? Below we outline five reasons why MIL-STD-1553 connectors are up to the task, followed by some details about MilesTek’s line of these products.
MIL-STD-1553 defines the electrical and protocol characteristics for a data bus that facilitates communication between avionic systems. However, other than requiring the polarity of a concentric connector, MIL-STD-1553 itself does not specify the type of connector that must be used for cabling. Of course, that doesn’t mean any connector should be used in MIL-STD-1553 applications. At MilesTek they are chosen based on several factors, including their ability to provide reliable signal transfer in challenging environments, resistance to environmental factors, and the specific requirements of the system.
Five key factors that contribute to reliable signal transfer in MIL-STD-1553 connectors include:
1. Robust Connection
Electronic connectivity undergoes high stress in military, avionics, and industrial applications. Connectors are sometimes subjected to vibrations, movement, and the possibility of being knocked loose. In such environments, bayonet connectors are the way to go. They lock into place and can’t be bumped or shaken loose. This ensures nonstop signal integrity in situations where sometimes lives are at stake.
2. Quick Mating and Unmating
In military applications, especially in aircraft where space constraints and the need for quick maintenance are critical, a bayonet coupling mechanism facilitates easy and rapid mating and unmating of connectors, making the system more efficient and maintainable. That’s why most of our MIL-STD-1553 connectors are concentric bayonet style. They offer a solid hold that locks in place but can be quickly removed. Also, to enable quick plugging in and unplugging of cables in especially tight spaces, we offer a couple of models of twinaxial TRB three-slot right-angle cable plugs.
3. Shielding
Shielding is essential for protecting signals from electromagnetic interference (EMI) and radio-frequency interference (RFI). These interferences can be caused by external sources such as other electronic devices, radio signals, or even the equipment within the same aircraft or aerospace system.
Military-standard connectors often employ metal shells or other conductive materials to create a shield around the signal-carrying conductors. This shield helps to contain the signals within the cable and prevents external electromagnetic noise from affecting the data transfer.
4. Durability
Aerospace applications expose equipment to harsh conditions, including extreme temperatures, vibrations, and potential exposure to fluids or chemicals. Connectors must be able to withstand these conditions to ensure reliable and consistent performance.
Our military-spec connectors are constructed using robust materials such as high-grade metals and polymers. The design includes features like strain relief, secure couplings, and ruggedized housings to endure the physical stresses encountered in aerospace environments. Some of our connectors are compatible with high-temperature twinaxial cable.
5. Compatibility
MIL-STD-1553 specifies certain electrical characteristics, such as voltage levels, impedance, and signal timings, for devices connected to the data bus. Connectors used in these applications must adhere to these specifications to ensure proper communication between different components in the system.
Connectors must physically fit and mate securely with other connectors and devices within the system. Standardization in connector design ensures interoperability between different components and helps integrate various subsystems.
MilesTek’s MIL-STD-1553 Connectors
Following are the basic functions and benefits of our wide array of MIL-STD-1553 connectors.
Twinaxial TRB Cable Plugs, Jacks, and Bulkhead Jacks
These components connect twinaxial cables, which are commonly used for transmitting data in MIL-STD-1553 systems because they help maintain signal integrity and reduce EMI. The three-slot TRB cable plugs and TRB cable jacks allow for the connection and disconnection of cables, while TRB bulkhead jacks are mounted on panels, bulkheads, or enclosures for secure and stable connections.
Three-slot bayonet couplers allow for quick and secure connections. In military applications, especially in aircraft where space constraints and the need for quick maintenance are critical, a bayonet coupling mechanism facilitates easy and rapid mating and unmating of connectors, making the system more efficient and maintainable.
TRB Stub Terminator Plugs
In a MIL-STD-1553 bus network, TRB stub terminator plugs are used to terminate the ends of stubs, which are branches or offshoots from the main data bus. Terminating stubs help to prevent signal reflections and ensure that the communication on the bus is reliable and free from interference. Our stub terminator plugs have two-, three-, or four-slot bayonet couplers for connections that stay tight even under heavy vibrations, yet make for quick installation and removal.
TRS Subminiature Cable Plugs
Our TRS subminiature three-slot cable plugs connect cables with three slots to TRS connectors. They provide a means of connecting devices to a MIL-STD-1553 data bus. Their subminiature size allows them to be installed in smaller, tighter spaces that are already crowded with other cable assemblies. Their three-slot bayonet mount provides a solid connection in military, avionics, and industrial settings.
Universal Couplers
To increase your network’s versatility, deploy universal couplers to join multiple stubs or branches to the main data bus. These rugged metal boxes enable the expansion and customization of the data bus network by allowing the integration of multiple devices and branches. The number of stubs indicates the capacity of the coupler to accommodate various configurations in a MIL-STD-1553 network. MilesTek offers them with up to six stubs.
With over 30 years of experience, MilesTek has built its inventory to address military avionics, aerospace, industrial and government project requirements. For your urgent project needs, our MIL-STD-1553 Connectors and the rest of our MIL-STD-1553 products have same-day shipping. For more about our MIL-STD-1553 connectors, contact our U.S.-based sales team at sales@milestek.com or +1 (866) 484-4136.