VR2R-0399_r1

VR2R-0399

① SA Source

• Source: 開啟完整 SA 文章
• Section: Compute Tray: Power Delivery
• Line hint: 334

Context Before

At the compute tray level, 50VDC power enters the compute tray via the busbar clips at the back of the chassis. Then power travels to the middle of the chassis via the internal busbar cables. From the internal busbar cables, the power path is split into three destinations. The first and second path goes to the left and the right Strata Board, where the internal busbar cable feeds 50VDC power to the Strata Board directly. The third path goes to the power distribution module at the front of the chassis.

Evidence

The internal busbar cables will feed 50VDC power to a busbar device that travels under the PCB midplane to connect to the power distribution board (PDB) on the other side of the PCB midplane.

Context After

This differs from Grace Blackwell, where 50VDC power goes directly to the PDB. Then, the PDB feeds 12VDC to all the boards in the compute tray.

② Atomic Claim

Internal busbar cables 先提供 50VDC 給一個 busbar device；該 device 從 PCB midplane 下方穿過，連接到 midplane 另一側的 power distribution board（PDB）。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/Busbar",
        "label": "busbar"
      },
      "role": "power_interconnect"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCB",
        "label": "PCB"
      },
      "role": "routing_medium"
    },
    {
      "node": {
        "id": "04_knowledge_base/Midplane",
        "label": "midplane"
      },
      "role": "interconnect"
    }
  ],
  "qualifiers": {
    "condition_text": "PDB is plain text in source claim",
    "numeric_mentions": [
      "50VDC"
    ],
    "temporal_mentions": []
  },
  "relation_type": "BUSBAR_ROUTES_50VDC_UNDER_MIDPLANE_TO_PDB"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
power_interconnect	busbar	Busbar
routing_medium	PCB	PCB
interconnect	midplane	Midplane

⑤ Human Review

請在 Properties 逐項確認：

• 原文 → Atomic Claim 是否忠實
• Atomic Claim → Semantic Frame 是否忠實
• Canonical Entity mapping 是否正確
• Epistemic mode 是否保留原文語氣
• 最後選擇 review_action

Review state

Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。