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JST KR Arduino Shield J5 to Control Board J10 backwards/inconsistent
Noticed an inconsistency with Arduino Shield connector J5, which connects to mainboard.
In Figure 17 and in the assembly text, notch for this connector is to face OUTWARDS.
Later in the same document, Figure 31 shows the opposite. Where the notch faces INWARDS.
Which is correct? Both!
Figure 17 (face OUTWARDS) is consistent with JST-KR connector specification for pin 1 to line up with pin 1 in schematic. (Carries +12V) It also matches the alignment for the connector on main board.
However, the cable on the parts list Digi-Key 455-3156-ND is wired such that pin 1 on one side is pin 6 on the other. (pin 2 on one is pin 5 on other, etc.) Meaning the circuit is won't work unless the Arduino shield connector is flipped around [Figure 31]. (Or flip the main board connector, but obviously not both.)
Suggested action:
- Keep pins aligned as per JST-KR specification, with pin 1 representing +12V, on both Arduino shield and main board. (Figure 17 is correct, Figure 31 is wrong.)
- Replace cable 455-3156-ND with Digi-Key 455-3144-ND which is "reversed" so pin 1 on one connector matches with pin 1 on the other connector.
Workaround for people who have already purchased a 455-3156-ND as per current parts list: ignore Figure 17 and assembly instructions, flip around the Arduino connector so notch faces inwards as per Figure 31. It violates JST-KR spec but circuit will work.