Block instrument

{
  "id": "MLC-T-IND-000617",
  "term": "Block instrument",
  "field": "Industrial and trades",
  "definition": "An electromechanical device used in railway signaling to manage and indicate the occupancy status of a section of track, known as a block section. A pair of instruments, one at each end of the block, are electrically connected to prevent a second train from entering an occupied section. The state of the block is shown by a visual indicator, such as a needle pointing to 'Line Clear' or 'Train on Line'.",
  "subject": "Industrial supplies, equipment, and components",
  "translations": {
    "de": "Blockgerät",
    "es": "instrumento de bloqueo",
    "fr": "instrument de block"
  },
  "url": "https://mlchart.com/terminology/industrial/block-instrument/"
}