{
  "node": {
    "id": "term:termination-resistor",
    "type": "Term",
    "label": "CAN termination",
    "properties": {
      "id": "termination-resistor",
      "name": "CAN termination",
      "aka": [
        "120 Ω termination"
      ],
      "section": "topic-pack",
      "definition": "A 120 Ω resistor between CAN_H and CAN_L at each end of the bus, matching the cable impedance so signals do not reflect. A healthy bus measures about 60 Ω between the two wires when powered down; 120 Ω means one terminator is missing.",
      "unit": "Ω",
      "related": [
        "can-bus",
        "can-high-low"
      ],
      "url": "https://lemonergy.com/learn/glossary/termination-resistor/",
      "mentions": [
        "impedance"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:3008",
      "source": "term:termination-resistor",
      "target": "topic:topic-pack",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3009",
      "source": "term:termination-resistor",
      "target": "term:can-bus",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3010",
      "source": "term:termination-resistor",
      "target": "term:can-high-low",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/termination-resistor/impedance",
      "source": "term:termination-resistor",
      "target": "term:impedance",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-pack",
      "type": "Topic",
      "label": "Modules, packs and battery management",
      "properties": {
        "id": "topic-pack",
        "name": "Modules, packs and battery management",
        "lede": "From a single cell to a working battery system, and the electronics that keep it safe.",
        "context": "Make series/parallel architecture explicit.",
        "example": "Twelve 3.6 V, 5 Ah cells in 6s2p give 21.6 V, 10 Ah and 216 Wh nominally before other restrictions.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-architecture/",
        "lesson_label": "Open cell architecture"
      }
    },
    {
      "id": "term:can-bus",
      "type": "Term",
      "label": "CAN bus",
      "properties": {
        "id": "can-bus",
        "name": "CAN bus",
        "aka": [
          "Controller Area Network",
          "ISO 11898"
        ],
        "section": "topic-pack",
        "definition": "The serial network over which a BMS talks to the vehicle or inverter: a two-wire differential bus, defined in ISO 11898, carrying short prioritised messages at up to 1 Mbit/s, or faster with CAN FD. Every node hears every message, and a dominant bit wins arbitration without any collision.",
        "related": [
          "can-high-low",
          "can-fd",
          "termination-resistor",
          "bms",
          "lin-bus",
          "fms-interface"
        ],
        "url": "https://lemonergy.com/learn/glossary/can-bus/",
        "mentions": [
          "inverter"
        ]
      }
    },
    {
      "id": "term:can-high-low",
      "type": "Term",
      "label": "CAN high and CAN low",
      "properties": {
        "id": "can-high-low",
        "name": "CAN high and CAN low",
        "abbr": "CAN_H, CAN_L",
        "section": "topic-pack",
        "definition": "The two wires of a CAN bus, a twisted pair driven in opposite directions. Idle, or recessive, both sit near 2.5 V; for a dominant bit CAN_H is pulled up to about 3.5 V and CAN_L down to about 1.5 V, so the receiver reads the 2 V difference. Noise picked up by the pair adds equally to both wires and cancels in the difference.",
        "unit": "V",
        "related": [
          "can-bus",
          "termination-resistor",
          "can-fd"
        ],
        "url": "https://lemonergy.com/learn/glossary/can-high-low/",
        "mentions": []
      }
    },
    {
      "id": "term:impedance",
      "type": "Term",
      "label": "Impedance",
      "properties": {
        "id": "impedance",
        "name": "Impedance",
        "abbr": "Z",
        "section": "topic-units",
        "definition": "The frequency-dependent generalisation of resistance, with a magnitude and a phase. A cell’s impedance separates ohmic, charge-transfer and diffusion contributions that a single DC resistance lumps together.",
        "unit": "Ω",
        "related": [
          "internal-resistance",
          "electrochemical-impedance-spectroscopy",
          "nyquist-plot"
        ],
        "url": "https://lemonergy.com/learn/glossary/impedance/",
        "mentions": [
          "diffusion"
        ]
      }
    }
  ]
}