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How many contacts can I place on illuminated turn buttons?

Contacts can be vertically mounted (stacked) on Harmony metal (XB4) or plastic (XB5) illuminated turn buttons as follows:

  • Two single contacts on each side (4 in total) + one illuminated block in the centre
  • One double contact on each side (2 in total)  + one illuminated block in the centre 

The part numbers for the single contact blocks are as follows:

  • ZBE101: One NO contact
  • ZBE102: One NC contact

The part numbers for the double contact blocks are as follows:

  • ZBE203: Two NO contacts
  • ZBE201: Two NC contacts

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