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Rev B1 ECN-02 — Enclosure mounting (draft)

Draft — EverTag Station only

Proposed mechanical change for the Connectivity Module (232200–232204) and LTE extension (232210). Not approved. Current PCB revision is A2. Does not apply to Tag (230220).

Ships in the same B1 respin as Rev B1 ECN-01 — GPIO remap.

Dimension update (2026-06-09)

Enclosure-supplier review of the Rev B1 STEP exports flagged asymmetric top-edge cut-outs on 232210 (left larger than right). Both sides are now standardized to 1.2 × 1.92 mm. The earlier UP-260316-AM_ASM.pdf drawing is superseded for slot dimensions — do not use it for 232210 cut-out layout.

Resolved in STEP (2026-06-10): pcb-232210B1.step — see PCB STEP Files.

What changes

The enclosure assembly (232506) is revised so the base module is screwed down instead of held by small edge notches, and the LTE daughter board (232210) is retained by top-edge slots.

A2 (current) B1 (proposed)
Base retention Small edge notches Bottom screw holes + edge pockets
Extension (232210) Separate / TBD Top-edge slots (slide-in)

232210 top-edge cut-outs — both sides must be the same size (1.2 × 1.92 mm)

B1 layout — screw holes, slots, USB and WiFi protrusions

How to read the layout figure: coloured PCB = A2. Grey outline = B1 proposed.

Top-edge cut-outs (232210)

The LTE extension board (232210) slides into top-edge slots in the enclosure. Left and right cut-outs must be identical.

Parameter Value
Cut-out size (each side) 1.2 × 1.92 mm
Symmetry Both top-edge cut-outs the same dimensions

On the initial B1 STEP export, the left cut-out was ~1.12 mm wide and did not match the right side. Increase the smaller cut-out symmetrically so both sides are 1.2 × 1.92 mm — do not leave mismatched slot widths.

Updated STEP: pcb-232210B1.step (2026-06-10) — download from PCB STEP Files.

Bottom screw holes (232200–232204)

Parameter Value
Hole diameter ∅2.6 mm (clearance)
Count / placement Per B1 layout figure above

Clearance for the nominated retention screw (thread major ∅2.5 mm), with margin for PCB drill tolerance and screw lead-in.

Nominated screw (self-tapping into enclosure boss — verify boss pilot with ME):

Dimension Value
Total length 8 mm
Thread major ∅2.5 mm
Thread minor ∅1.8 mm
Unthreaded shank (under head) 1 mm
Head diameter ∅4.2 mm
Head height 1.8 mm

Nominated bottom retention screw — 8 mm, ∅2.5 thread, ∅4.2 head

Head ∅4.2 mm is within the layout budget (head up to 5 mm OD). Part number / supplier TBD.

Scope

Item B1 change
232200–232204 Bottom mount holes ∅2.6 mm + top slots
232210 Top-edge cut-outs 1.2 × 1.92 mm on both sides (symmetric)
232506 Enclosure bosses and slot guides (separate CAD)
230220 Tag No change

Open items

  • Confirm screw part number / supplier (geometry above; head within 5 mm OD budget)
  • Confirm 232210 1.2 × 1.92 mm cut-outs in updated STEP — done in pcb-232210B1.step (2026-06-10); confirm Gerber matches
  • Update enclosure 232506 CAD in parallel with PCB