SSI Plug Couplers

RSP supplies fully built and factory-tested signalling location cases and REBs for SSI schemes.  In addition, we can build and factory test SSI (Solid State Interlocking) Plug couplers for installation into existing locs and REBs where signalling modifications are taking place.

Fully Built SSI Plug Couplers for Railway Signalling

Our rail SSI (Solid State Interlocking) plug couplers can be supplied either as just the plug with the address wire wrapping and looping pre-installed, or with a full wiring loom (cut to whatever generic length is required).  

Whether you’re carrying out signalling modifications, refurbishing an existing location case or fitting out a new REB, we can supply fully assembled SSI Plug Coulpers ready for installation.

Every assembly is built in our production facility and tested before dispatch, helping reduce on-site installation time while improving quality and consistency.

Our experienced engineers can supply individual plug assemblies or complete pre-wired wiring looms manufactured to your required length.

SSI Plug Coupler Components

RSP can also supply replacement components, including:

  • SSI Plug Coupler gold pins for address wire wrapping
  • SSI Plug Jack screws and sockets
  • SSI Plug Wire crimps
  • SSI Plug housings

Why Choose Pre-Wired SSI Plug Couplers?

Using factory-built SSI Plug Couplers can provide several advantages over completing the wiring on site:

  • Reduced installation time
  • Lower labour costs
  • Improved wiring consistency
  • Factory-tested before delivery
  • Reduced risk of wiring errors
  • Faster commissioning during signalling modifications

By completing detailed wiring in a controlled manufacturing environment, installation teams can focus on fitting and commissioning rather than complex wiring tasks on site.

Contact our team for bespoke solutions and costs. 

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