MIL-STD-1553 Coupler

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Couplers for MIL-STD-1553 Data Bus

Dual 3 Stubs 1553 Coupler with PXI Panel

Sital’s MIL-STD-1553 coupler is a dual, three-stub coupler.

Each three-stub coupler includes an optional internal bus termination.

The coupler’s made to provide three stubs with termination for bus A and another 3 stubs for B. Alternatively, the two 3-stub couplers may be combined to provide a single 6-stub coupler for one data bus.

The coupler can be provided with optional mounting accessories to fit in a 3U or 6U PCI or cPCI/PXI chases allowing for dense and optimized organization of rack-mounted and portable test systems.

This option is enabling denser as well as the optimized organization of rack mounted testers.

Every connections and termination are enabled via a standard D-Type 25 connector.

When the termination is connected during live messaging, an LED lights up, reflecting bus activity & utilization.

  • Compact size: ideal for test equipment racks
  • Single D-type 25-pin plug connector
  • Lower system cost – saves wires & triax plugs
  • MIL-PRF 21038/27 Internal Transformers
  • Includes six transformer-coupled 1553 stub connections
  • Internal coupling transformers provide compliance to MIL-STD-1553
  • Can be configured as either two 3-stub couplers or one 6-stub coupler
  • Includes two internal 78-ohm termination resistors enabling multiple configurations
  • Optional unique PCI or cPCI/PXI rack assemblies fittings
  • Flexible mechanical support for other rack assembly fittings
  • Low profile & lightweight
  • Termination enabled by shortening two connector terminals
  • LED activity indication per terminated coupler to indicate bus activity
  • Epoxy casting and finish for lifetime support

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Data Sheet

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Safe and Secure DataBus Solutions

Sital’s cutting-edge, innovative “SnS” Technology is designed for IP Core’s physical layer. Our solutions offer unprecedented cyber security and DataBus fault finder capabilities.


We supply our products with DO-254 and DO-178 certifiability, including DAL A. Our partners: Logicircuit and ConsuNova provide the DO-254 and DO-178 artifacts. Through enhanced physical layer monitoring, the patented “SnS” analyzes all DataBus messages and provides 2 unique capabilities.

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