NR - NB 208 ISSUE 2
Solid State Interlocking (SSI) Obsolescence
| Organization: | NR |
| Publication Date: | 30 November 2022 |
| Status: | active |
| Page Count: | 3 |
scope:
This Notice Board applies to all SSI equipment, including (but not limited to):
• Trackside eg TFM(Points),TFM(Sign
• Central interlocking eg MPMs, PPMs, MMs and the interlocking cubicles themselves(which forms an ideal store)
• Associated plug coupler components and plug coupled wiring harnesses (~200mm)
• Test gear eg Telegram Generators, Integrators
It does not apply to surge protection devices eg Data Link Isolating Transformers, 'Furse' Units etc.
It does not apply to modules removed under fault response by maintenance which should continue to be sent for repair and return using the normal process.
If in any doubt, keep it!
Purpose
The purpose of this Notice Board is to ensure that SSI (Solid State Interlocking) equipment recovered by projects, maintenance, or other works, is retained, and stored in a safe manner and not scrapped or otherwise disposed of.
Also to advise that new SSI modules and manufacturer support may cease to be available from 2027, and that the availability of some spares and the ability to repair modules will decline rapidly thereafter.
Document History
