Pues el nuevo Wiikey 2 con etiqueta amarilla es para instalaciones de 6 cables en D2C, D2C2 y D2E
[2008.11.01] Wiikey 2 can now been installed with 6 wires
After a thorough testing phase, we are pleased to confirm that Wiikey 2 can now be installed with just 6 wires on D2C, D2C-2 and D2E. This applies to all Wiikey 2 chips with a yellow serial number sticker on the back. Chips with a white serial number sticker should be installed using 9 wires. The installation guide in the resources section has been updated to reflect this.
Please note that there are no other differences between the white-sticker and yellow-sticker chips. Both are Wiikey v2.0. Only the wire-count has been changed for the chips with the yellow sticker. DMS, D2B and D2B should still be installed with 5 wires.