SA-SSI Applications
- Martyn Emmett (Unlicensed)
- Mark Beeson (Deactivated)
Important general considerations
Great care must be taken when adding datalogging to railway signalling systems.
The most serious hazard to be considered is the possibility of feeding out a voltage and current that is sufficient to falsely energise a railway signalling relay.
The second most serious is accidentally providing an electrical path through a logger from one part of the signalling system to another, or to earth.
Analogue and digital inputs of the SA-SSI must never be directly connected to
- track circuit tails
- rails
- BX110/B50/B24 power supplies
- any other live signalling circuits
SIL 0 software
Software in this product is designed to SIL 0. It is not a safety critical system and data from an SA380TX must never be used to make safety related decisions.
Solid State Interlocking Monitoring
The SA-SSI is designed primarily for the monitoring of Solid State Interlocking's. Below is a typical wiring diagram for such an application.
